{"id":3586,"date":"2026-04-03T06:50:35","date_gmt":"2026-04-03T06:50:35","guid":{"rendered":"https:\/\/motorcyclechain.top\/?post_type=product&#038;p=3586"},"modified":"2026-04-03T06:50:38","modified_gmt":"2026-04-03T06:50:38","slug":"420-standard-motorcycle-chain-12-700mm-pitch-15-6-kn","status":"publish","type":"product","link":"https:\/\/motorcyclechain.top\/nl\/product\/420-standard-motorcycle-chain-12-700mm-pitch-15-6-kn\/","title":{"rendered":"420 Standaard Motorfietsketting | 12.700 mm steek, 15,6 kN"},"content":{"rendered":"<div style=\"font-family: 'Segoe UI',Arial,sans-serif; color: #333; max-width: 1100px; margin: 0 auto; padding: 2% 3%; box-sizing: border-box; word-break: break-word; overflow-wrap: break-word;\">\n<p><!-- \u2550\u2550\u2550 OVERVIEW \u2550\u2550\u2550 --><\/p>\n<h2 style=\"font-size: clamp(18px,2.5vw + 11px,26px); color: #1a3c6e; border-left: 4px solid #e8a020; padding-left: 12px; margin-top: 0; margin-bottom: 16px;\">Productoverzicht<\/h2>\n<div style=\"font-size: clamp(14px,2vw + 10px,18px); line-height: 1.8;\">\n<p>The <strong>420 motorcycle chain<\/strong> is a roller drive chain with a 12.700 mm pitch and 6.35 mm inner width \u2014 the narrowest and lightest of the commonly-used 1\/2-inch pitch family. It occupies the lightest end of the standard motorcycle chain spectrum, designed for engines where output is moderate and where minimising rotating mass and chain weight genuinely contributes to overall machine performance. At 0.57 kg\/m and 15.6 kN tensile strength, the 420 handles the torque range of 50cc to approximately 125cc four-stroke engines with comfortable headroom.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3589 aligncenter\" src=\"https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/420-Standard-Motorcycle-Chain-1-1.webp\" alt=\"420 Standaard Motorfietsketting 1 (1)\" width=\"600\" height=\"600\" srcset=\"https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/420-Standard-Motorcycle-Chain-1-1.webp 600w, https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/420-Standard-Motorcycle-Chain-1-1-480x480.webp 480w\" sizes=\"auto, (min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 600px, 100vw\" \/><\/p>\n<p>The 420 pitch is standard fitment on most 50cc mopeds, entry-level 125cc motorcycles, many off-road dirt bikes in the 50\u2013110cc class, and a wide variety of ATVs and smaller recreational off-road vehicles. Its light weight is genuinely beneficial on these machines \u2014 a 420 chain is measurably lighter than a 428 or 520 unit, and on a 70kg machine with a 4kW engine, that matters more than on a 200kg touring bike with a 60kW engine.<\/p>\n<\/div>\n<p><!-- \u2550\u2550\u2550 SPEC TABLE \u2550\u2550\u2550 --><\/p>\n<h2 style=\"font-size: clamp(18px,2.5vw + 11px,26px); color: #1a3c6e; border-left: 4px solid #e8a020; padding-left: 12px; margin-top: 40px; margin-bottom: 16px;\">Specificaties<\/h2>\n<div style=\"overflow-x: auto; width: 100%; margin: 16px 0;\">\n<table style=\"width: 100%; border-collapse: collapse; min-width: 680px; font-size: clamp(12px,1.5vw + 8px,14px);\">\n<thead>\n<tr style=\"background: #1a3c6e; color: #fff;\">\n<th style=\"padding: 9px 7px; text-align: center; border: 1px solid #2a4c7e;\">Kettingnr.<\/th>\n<th style=\"padding: 9px 7px; text-align: center; border: 1px solid #2a4c7e;\">Steek (mm)<\/th>\n<th style=\"padding: 9px 7px; text-align: center; border: 1px solid #2a4c7e;\">Struiktype<\/th>\n<th style=\"padding: 9px 7px; text-align: center; border: 1px solid #2a4c7e;\">Breedte (mm)<\/th>\n<th style=\"padding: 9px 7px; text-align: center; border: 1px solid #2a4c7e;\">Pendiameter (mm)<\/th>\n<th style=\"padding: 9px 7px; text-align: center; border: 1px solid #2a4c7e;\">Lengte van de pen (mm)<\/th>\n<th style=\"padding: 9px 7px; text-align: center; border: 1px solid #2a4c7e;\">Diameter van de rol (mm)<\/th>\n<th style=\"padding: 9px 7px; text-align: center; border: 1px solid #2a4c7e;\">Plaat T Binnenzijde (mm)<\/th>\n<th style=\"padding: 9px 7px; text-align: center; border: 1px solid #2a4c7e;\">Plaat T Buitendiameter (mm)<\/th>\n<th style=\"padding: 9px 7px; text-align: center; border: 1px solid #2a4c7e;\">Treksterkte (kN)<\/th>\n<th style=\"padding: 9px 7px; text-align: center; border: 1px solid #2a4c7e;\">Gewicht (kg\/m)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f0f5ff;\">\n<td style=\"padding: 9px 7px; text-align: center; border: 1px solid #d0dce8; font-weight: bold;\">420<\/td>\n<td style=\"padding: 9px 7px; text-align: center; border: 1px solid #d0dce8;\">12.700<\/td>\n<td style=\"padding: 9px 7px; text-align: center; border: 1px solid #d0dce8;\">Gekruld<\/td>\n<td style=\"padding: 9px 7px; text-align: center; border: 1px solid #d0dce8;\">6.35<\/td>\n<td style=\"padding: 9px 7px; text-align: center; border: 1px solid #d0dce8;\">3.96<\/td>\n<td style=\"padding: 9px 7px; text-align: center; border: 1px solid #d0dce8;\">14.70<\/td>\n<td style=\"padding: 9px 7px; text-align: center; border: 1px solid #d0dce8;\">7.77<\/td>\n<td style=\"padding: 9px 7px; text-align: center; border: 1px solid #d0dce8;\">1.50<\/td>\n<td style=\"padding: 9px 7px; text-align: center; border: 1px solid #d0dce8;\">1.50<\/td>\n<td style=\"padding: 9px 7px; text-align: center; border: 1px solid #d0dce8;\">15.6<\/td>\n<td style=\"padding: 9px 7px; text-align: center; border: 1px solid #d0dce8;\">0.57<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- \u2550\u2550\u2550 COMPARISON: 420 vs 428 vs 520 pitch selection \u2550\u2550\u2550 --><\/p>\n<h2 style=\"font-size: clamp(18px,2.5vw + 11px,26px); color: #1a3c6e; border-left: 4px solid #e8a020; padding-left: 12px; margin-top: 40px; margin-bottom: 16px;\">420 vs 428 vs 520 \u2014 Choosing the Right Pitch<\/h2>\n<div style=\"font-size: clamp(14px,2vw + 10px,18px); line-height: 1.8; margin-bottom: 16px;\">\n<p>All three pitches belong to the 12.70 mm (1\/2 inch) pitch family but carry different inner widths and consequently different roller contact areas. The pitch number encodes both pitch (first two digits: &#8220;42&#8221; = 4\/8 inch \u00d7 10 = 12.7 mm; &#8220;52&#8221; = 5\/8 inch \u00d7 10 = 15.875 mm) and width class (last two digits). For bikes currently running a 420, attempting to fit a 428 or 520 requires sprocket replacement \u2014 the sprockets are not interchangeable between inner width families. Confirm your existing chain&#8217;s stamped number before ordering any replacement.<\/p>\n<\/div>\n<div style=\"overflow-x: auto; width: 100%; margin: 16px 0;\">\n<table style=\"width: 100%; border-collapse: collapse; min-width: 500px; font-size: clamp(12px,1.5vw + 8px,14px);\">\n<thead>\n<tr style=\"background: #1a3c6e; color: #fff;\">\n<th style=\"padding: 9px 8px; text-align: left; border: 1px solid #2a4c7e;\">Specificatie<\/th>\n<th style=\"padding: 9px 8px; text-align: center; border: 1px solid #2a4c7e; background: #2d5490;\">420 (This Chain)<\/th>\n<th style=\"padding: 9px 8px; text-align: center; border: 1px solid #2a4c7e;\">428<\/th>\n<th style=\"padding: 9px 8px; text-align: center; border: 1px solid #2a4c7e;\">520<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f0f5ff;\">\n<td style=\"padding: 8px; border: 1px solid #d0dce8;\">Steek (mm)<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8; font-weight: bold;\">12.700<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">12.700<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">15.875<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 8px; border: 1px solid #d0dce8;\">Inner width (mm)<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8; font-weight: bold;\">6.35<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">7.85<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">6.35<\/td>\n<\/tr>\n<tr style=\"background: #f0f5ff;\">\n<td style=\"padding: 8px; border: 1px solid #d0dce8;\">Roller diameter (mm)<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8; font-weight: bold;\">7.77<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">8.51<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">10.16<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 8px; border: 1px solid #d0dce8;\">Tensile strength (kN)<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8; font-weight: bold;\">15.6<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">17.8<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">26.5<\/td>\n<\/tr>\n<tr style=\"background: #f0f5ff;\">\n<td style=\"padding: 8px; border: 1px solid #d0dce8;\">Gewicht (kg\/m)<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8; font-weight: bold;\">0.57<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">0.71<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">0.91<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 8px; border: 1px solid #d0dce8;\">Typical engine displacement<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8; font-weight: bold;\">50\u2013125cc<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">125\u2013250cc<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">250\u2013600cc<\/td>\n<\/tr>\n<tr style=\"background: #f0f5ff;\">\n<td style=\"padding: 8px; border: 1px solid #d0dce8;\">Common applications<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8; font-weight: bold;\">Mopeds, mini dirt bikes, small ATVs<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">125\u2013250cc street, off-road<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">Mid-range sport and naked bikes<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 8px; border: 1px solid #d0dce8;\">Sprocket interchangeability<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8; font-weight: bold;\">420 sprockets only<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">428 sprockets only<\/td>\n<td style=\"padding: 8px; text-align: center; border: 1px solid #d0dce8;\">520 sprockets only<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div style=\"font-size: clamp(14px,2vw + 10px,18px); line-height: 1.8; margin-top: 12px;\">\n<p>The 420&#8217;s narrower width versus the 428 (6.35 vs 7.85 mm inner) is the most significant physical difference between the two same-pitch options. Both use 12.70 mm pitch \u2014 and that&#8217;s the only dimension that matters for sprocket mesh \u2014 but the 420&#8217;s narrower roller means it will not seat correctly in a 428 sprocket&#8217;s tooth spacing. Always check whether your sprockets are stamped 420 or 428 before ordering, especially on bikes where previous owners may have upgraded the <a href=\"https:\/\/motorcyclechain.top\/nl\/product-category\/motorcycle-chain\/\"><strong>motorfietsketen<\/strong><\/a> without replacing the sprockets.<\/p>\n<\/div>\n<p><!-- \u2550\u2550\u2550 ADVANTAGES AND TRADE-OFFS \u2550\u2550\u2550 --><\/p>\n<h2 style=\"font-size: clamp(18px,2.5vw + 11px,26px); color: #1a3c6e; border-left: 4px solid #e8a020; padding-left: 12px; margin-top: 40px; margin-bottom: 16px;\">Advantages and Trade-offs of the 420<\/h2>\n<div style=\"font-size: clamp(14px,2vw + 10px,18px); line-height: 1.8; margin-bottom: 16px;\">\n<p>The 420 pitch occupies a clear niche. Understanding both what it does well and where its limits are helps ensure you&#8217;re choosing the right specification for your actual riding needs, not simply defaulting to a &#8220;bigger is better&#8221; upgrade that adds weight without benefit.<\/p>\n<\/div>\n<div style=\"display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 20px;\">\n<div style=\"flex: 1; min-width: 240px; background: #f0f5ff; border: 1px solid #d0dce8; border-radius: 8px; padding: 3%; box-sizing: border-box;\">\n<h3 style=\"font-size: clamp(14px,1.8vw + 10px,17px); color: #1a3c6e; margin: 0 0 12px;\">Where the 420 works well<\/h3>\n<ul style=\"list-style: none; padding: 0; margin: 0;\">\n<li style=\"display: flex; gap: 8px; padding: 6px 0; font-size: clamp(13px,1.6vw + 9px,15px); border-bottom: 1px solid #dde5f5;\"><span style=\"color: #1a6ec8;\">\u2714<\/span>50\u2013125cc scooters and mopeds on paved roads \u2014 the output is well within the 15.6 kN load capacity with substantial safety margin<\/li>\n<li style=\"display: flex; gap: 8px; padding: 6px 0; font-size: clamp(13px,1.6vw + 9px,15px); border-bottom: 1px solid #dde5f5;\"><span style=\"color: #1a6ec8;\">\u2714<\/span>Mini dirt bikes and pit bikes where weight reduction is a genuine performance factor in the power-to-weight ratio<\/li>\n<li style=\"display: flex; gap: 8px; padding: 6px 0; font-size: clamp(13px,1.6vw + 9px,15px); border-bottom: 1px solid #dde5f5;\"><span style=\"color: #1a6ec8;\">\u2714<\/span>Budget-conscious replacement on bikes that OEM-spec 420 \u2014 upgrading to a heavier pitch means new sprockets too, which is rarely cost-justified<\/li>\n<li style=\"display: flex; gap: 8px; padding: 6px 0; font-size: clamp(13px,1.6vw + 9px,15px);\"><span style=\"color: #1a6ec8;\">\u2714<\/span>Recreational ATVs and lightweight off-road vehicles where the drivetrain is rarely close to its load limits<\/li>\n<\/ul>\n<\/div>\n<div style=\"flex: 1; min-width: 240px; background: #fff8f0; border: 1px solid #e8d0b0; border-radius: 8px; padding: 3%; box-sizing: border-box;\">\n<h3 style=\"font-size: clamp(14px,1.8vw + 10px,17px); color: #7a3c00; margin: 0 0 12px;\">Where to consider an upgrade<\/h3>\n<ul style=\"list-style: none; padding: 0; margin: 0;\">\n<li style=\"display: flex; gap: 8px; padding: 6px 0; font-size: clamp(13px,1.6vw + 9px,15px); border-bottom: 1px solid #f0ddc0;\"><span style=\"color: #c07020;\">\u2717<\/span>High-performance 125\u2013150cc engines producing above approximately 12\u201315 kW \u2014 the safety factor at 15.6 kN may be insufficient under sustained hard acceleration<\/li>\n<li style=\"display: flex; gap: 8px; padding: 6px 0; font-size: clamp(13px,1.6vw + 9px,15px); border-bottom: 1px solid #f0ddc0;\"><span style=\"color: #c07020;\">\u2717<\/span>Off-road use with frequent water crossings or sustained mud exposure \u2014 consider the 420H (reinforced) or a sealed variant for better service life<\/li>\n<li style=\"display: flex; gap: 8px; padding: 6px 0; font-size: clamp(13px,1.6vw + 9px,15px);\"><span style=\"color: #c07020;\">\u2717<\/span>Riders who cannot commit to the 400\u2013500 km lubrication interval the non-sealed standard chain requires \u2014 the sealed 4205-O or 415H-O (O-ring sealed) handles longer intervals better<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p><!-- \u2550\u2550\u2550 LUBRICATION \u2550\u2550\u2550 --><\/p>\n<h2 style=\"font-size: clamp(18px,2.5vw + 11px,26px); color: #1a3c6e; border-left: 4px solid #e8a020; padding-left: 12px; margin-top: 40px; margin-bottom: 16px;\">Lubrication Schedule and Method<\/h2>\n<div style=\"font-size: clamp(14px,2vw + 10px,18px); line-height: 1.8; margin-bottom: 16px;\">\n<p>A 420 standard chain should be lubricated every 400\u2013600 km under normal paved-road conditions, or more frequently if you ride in wet or dusty environments. The curled-bushing construction means the internal joint relies entirely on externally applied lubricant \u2014 once that film dries out or is displaced by road grime, pin-bushing wear accelerates rapidly. On scooters covering short daily distances, time can also be a practical trigger: if three weeks have passed since the last lubrication regardless of mileage, lube the chain before the next ride.<\/p>\n<\/div>\n<ol style=\"list-style: none; padding-left: 0; margin: 0 0 16px;\">\n<li style=\"display: flex; gap: 10px; padding: 8px 0; font-size: clamp(14px,2vw + 10px,18px); border-bottom: 1px solid #f0f0f0; align-items: flex-start;\"><span style=\"flex-shrink: 0; background: #1a3c6e; color: #fff; border-radius: 50%; min-width: 26px; height: 26px; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: bold;\">1<\/span><br \/>\nClean the chain first with a degreaser or dedicated chain cleaner. Rinse with water and allow to dry \u2014 applying lubricant over old grit traps abrasive material against the roller surfaces.<\/li>\n<li style=\"display: flex; gap: 10px; padding: 8px 0; font-size: clamp(14px,2vw + 10px,18px); border-bottom: 1px solid #f0f0f0; align-items: flex-start;\"><span style=\"flex-shrink: 0; background: #1a3c6e; color: #fff; border-radius: 50%; min-width: 26px; height: 26px; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: bold;\">2<\/span><br \/>\nApply chain lubricant to the inside of the chain links \u2014 the inner faces between rollers and plates \u2014 while rotating the rear wheel by hand. This targets the surfaces where roller-to-sprocket and pin-to-bushing contact occurs.<\/li>\n<li style=\"display: flex; gap: 10px; padding: 8px 0; font-size: clamp(14px,2vw + 10px,18px); border-bottom: 1px solid #f0f0f0; align-items: flex-start;\"><span style=\"flex-shrink: 0; background: #1a3c6e; color: #fff; border-radius: 50%; min-width: 26px; height: 26px; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: bold;\">3<\/span><br \/>\nApply a thin coat to the outer plate surfaces to reduce corrosion on the plate faces, particularly relevant during wet seasons or in salt-air coastal environments.<\/li>\n<li style=\"display: flex; gap: 10px; padding: 8px 0; font-size: clamp(14px,2vw + 10px,18px); border-bottom: 1px solid #f0f0f0; align-items: flex-start;\"><span style=\"flex-shrink: 0; background: #1a3c6e; color: #fff; border-radius: 50%; min-width: 26px; height: 26px; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: bold;\">4<\/span><br \/>\nWipe excess lubricant from the outer plate faces after 2 minutes. Excess oil flings off at speed onto the rear tyre and also collects road dust, which negates the lubrication benefit.<\/li>\n<li style=\"display: flex; gap: 10px; padding: 8px 0; font-size: clamp(14px,2vw + 10px,18px); align-items: flex-start;\"><span style=\"flex-shrink: 0; background: #1a3c6e; color: #fff; border-radius: 50%; min-width: 26px; height: 26px; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: bold;\">5<\/span><br \/>\nAllow lubricant to dry before riding. Check chain slack at the same time \u2014 correct slack for most small-displacement machines is 25\u201330 mm of vertical movement at the midpoint of the lower chain run. Check your owner&#8217;s manual for the model-specific figure.<\/li>\n<\/ol>\n<div style=\"font-size: clamp(13px,1.6vw + 9px,15px); background: #f7f9fc; border-left: 3px solid #1a3c6e; padding: 12px 16px; border-radius: 4px; margin: 0 0 20px; line-height: 1.7;\">Climate note: In humid Korean summer conditions or during the monsoon period, lubricate after any ride longer than 300 km or after any wet ride. Road spray strips lubricant from non-sealed chains more rapidly than dry conditions suggest.<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3590\" src=\"https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/Motorcycle-Chain-application-1-1.webp\" alt=\"Motorcycle Chain application 1-1\" width=\"1595\" height=\"985\" srcset=\"https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/Motorcycle-Chain-application-1-1.webp 1595w, https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/Motorcycle-Chain-application-1-1-1280x790.webp 1280w, https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/Motorcycle-Chain-application-1-1-980x605.webp 980w, https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/Motorcycle-Chain-application-1-1-480x296.webp 480w\" sizes=\"auto, (min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1595px, 100vw\" \/><\/p>\n<p><!-- \u2550\u2550\u2550 SPROCKETS \u2550\u2550\u2550 --><\/p>\n<h2 style=\"font-size: clamp(18px,2.5vw + 11px,26px); color: #1a3c6e; border-left: 4px solid #e8a020; padding-left: 12px; margin-top: 40px; margin-bottom: 16px;\">Sprockets for Motorcycle Chains \u2014 Gear Ratio and Selection<\/h2>\n<div style=\"font-size: clamp(14px,2vw + 10px,18px); line-height: 1.8;\">\n<p>The front and rear <a style=\"color: #1a6ec8;\" href=\"https:\/\/chains-sprockets.com\/\" target=\"_blank\" rel=\"noopener\">sprockets<\/a> define the final drive ratio \u2014 the ratio of rear sprocket tooth count to front sprocket tooth count. On a 420-equipped machine with 14 front teeth and 42 rear teeth, the ratio is 3.0:1, meaning the rear wheel turns once for every three crankshaft rotations at the engine&#8217;s output shaft (after the gearbox). Increasing the rear sprocket tooth count (or reducing front) raises the ratio, giving more acceleration at the cost of top speed. Reducing rear teeth (or adding front) lowers the ratio, raising top speed while reducing low-end pull.<\/p>\n<p>For the standard 420 specification, sprocket material is typically steel \u2014 providing the best durability match for a chain expected to cover 8,000\u201315,000 km before replacement. Aluminium sprockets on a 420 machine are uncommon because the weight saving relative to the machine&#8217;s overall mass is negligible, and steel outlasts aluminium by a significant factor at this chain pitch and power level.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3479 aligncenter\" style=\"max-width: 100%; height: auto; display: block; margin: 12px 0; border-radius: 6px;\" title=\"motorfietsketting en tandwiel 2\" src=\"https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/motorcycle-chain-and-sprocket-2.webp\" alt=\"motorfietsketting en tandwiel 2\" width=\"1254\" height=\"1254\" srcset=\"https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/motorcycle-chain-and-sprocket-2.webp 1254w, https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/motorcycle-chain-and-sprocket-2-980x980.webp 980w, https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/motorcycle-chain-and-sprocket-2-480x480.webp 480w\" sizes=\"auto, (min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1254px, 100vw\" \/><\/p>\n<p>When replacing the chain, inspect both sprockets. Tooth tips that appear pointed or thinned, or leading tooth faces with a hook-shaped profile, mean the sprockets should be replaced simultaneously. Fitting a new 420 chain on worn sprockets will accelerate the new chain&#8217;s elongation rate considerably \u2014 the worn sprocket shifts load onto the chain&#8217;s side plates rather than the rollers, which is not how 420 chains are designed to carry load.<\/p>\n<\/div>\n<p><!-- \u2550\u2550\u2550 MANUFACTURER \u2550\u2550\u2550 --><\/p>\n<p>&nbsp;<\/p>\n<h2 style=\"font-size: clamp(18px,2.5vw + 11px,26px); color: #1a3c6e; border-left: 4px solid #e8a020; padding-left: 12px; margin-top: 40px; margin-bottom: 16px;\">Veelgestelde vragen<\/h2>\n<div style=\"font-size: clamp(14px,2vw + 10px,18px); line-height: 1.8;\">\n<p><strong>Can I use a 428 chain on a bike that currently runs a 420?<\/strong><br \/>\nNot without replacing both sprockets. The 420 and 428 share the same 12.70 mm pitch, so the chain links engage at the same spacing \u2014 but the inner width difference (6.35 mm vs 7.85 mm) means the roller will not seat correctly in 420 sprocket tooth gaps if a 428 chain is fitted. The chain will either bind or ride incorrectly on the teeth, causing rapid wear and safety risk. Only fit a 428 chain if you also replace both sprockets with 428-specification parts.<\/p>\n<p><strong>What is the difference between a 420 and 415 chain?<\/strong><br \/>\nThe 415 has the same 12.70 mm pitch but an even narrower inner width of approximately 4.76 mm (versus 6.35 mm for the 420). The 415 is used on very small-displacement machines \u2014 50cc racing and some mini-bikes \u2014 where minimum chain weight is the priority. The 420 is the more common choice because the wider roller provides a larger contact area on the sprocket tooth, reducing tooth wear rate at equivalent loads.<\/p>\n<p><strong>How do I measure 420 chain stretch to decide when to replace?<\/strong><br \/>\nMeasure 20 consecutive links (pin centre to pin centre across 20 links) under slight tension applied to the chain. The nominal 20-link distance is 20 \u00d7 12.70 = 254.0 mm. Replace the chain when the measured length exceeds 261.6 mm (3% elongation). Also pull the chain away from the rear sprocket at the centre of the chain run \u2014 if you can expose more than half a tooth root, the chain is worn beyond adjustment range.<\/p>\n<p><strong>Is the 420 available in a sealed O-ring version?<\/strong><br \/>\nThe 4205-O (O-ring sealed, 12.70 mm pitch, 6.35 mm inner width) is the sealed equivalent. It uses the same pitch and sprocket compatibility as the 420 but with solid bushing construction and O-ring seals at each joint, extending lubrication intervals to 600\u20131,000 km and delivering considerably longer service life in wet or off-road conditions. Contact us to confirm availability and specification details.<\/p>\n<p><strong>How many links does a 420 chain typically have?<\/strong><br \/>\nLink count varies by machine \u2014 it depends on the rear wheel travel distance (distance from front to rear sprocket) and the sprocket tooth counts. Common 420 link counts for 50\u2013125cc machines range from 96 to 120 links, but confirm the exact count from your owner&#8217;s manual or by counting the links on the removed chain. Ordering the wrong link count requires adding or removing links at the master link, which is possible but adds a step to the installation.<\/p>\n<\/div>\n<p><!-- \u2550\u2550\u2550 REVIEWS \u2550\u2550\u2550 --><\/p>\n<h2 style=\"font-size: clamp(18px,2.5vw + 11px,26px); color: #1a3c6e; border-left: 4px solid #e8a020; padding-left: 12px; margin-top: 40px; margin-bottom: 16px;\">Klantenrecensies<\/h2>\n<div style=\"font-size: clamp(14px,2vw + 10px,18px); line-height: 1.8;\">\n<p><strong>Park Jae-woo<\/strong>, Scooter Fleet Manager, Seoul (February 2025)<br \/>\n&#8220;We run 15 delivery scooters on 420 chains with a monthly replacement rotation. The quality from Korea Ever-Power is consistent batch to batch \u2014 same stretch characteristics, same installation fit. Our maintenance cost per bike has been stable since switching. No quality-related chain failures in eight months.&#8221;<\/p>\n<hr style=\"border: none; border-top: 1px solid #d0dce8; margin: 16px 0;\" \/>\n<p><strong>Kim Hyun-ki<\/strong>, Pit Bike Racer, Gyeonggi-do (January 2025)<br \/>\n&#8220;Running a 420 on a 110cc pit bike at club events. The chain is noticeably lighter than the 428 I used to run \u2014 on a 65kg machine the weight difference in rotating components is actually relevant. Korea Ever-Power&#8217;s 420 holds tension consistently across a weekend of track use. Lubing between sessions keeps it in good shape.&#8221;<\/p>\n<hr style=\"border: none; border-top: 1px solid #d0dce8; margin: 16px 0;\" \/>\n<p><strong>Lee Young-hoon<\/strong>, Student Commuter, Daejeon (December 2024)<br \/>\n&#8220;Fitted a 420 on my 50cc moped myself \u2014 no experience beforehand, but the installation is straightforward. The chain came with a clip link and installed without issues. Running it every day for four months, lubing every 400 km. No tension problems and no rust, even through the rainy stretch in December.&#8221;<\/p>\n<hr style=\"border: none; border-top: 1px solid #d0dce8; margin: 16px 0;\" \/>\n<p><strong>Choi Tae-jin<\/strong>, Motorcycle Parts Retailer, Busan (November 2024)<br \/>\n&#8220;The 420 is one of our top-moving SKUs for the small scooter and moped market. Korea Ever-Power&#8217;s supply is reliable and the quality is consistently acceptable to our customers. We&#8217;ve had very few returns on this chain \u2014 the occasional dimensional query is always resolved quickly by their team.&#8221;<\/p>\n<\/div>\n<p><!-- \u2550\u2550\u2550 PACKING AND SHIPPING \u2550\u2550\u2550 --><\/p>\n<h2 style=\"font-size: clamp(18px,2.5vw + 11px,26px); color: #1a3c6e; border-left: 4px solid #e8a020; padding-left: 12px; margin-top: 40px; margin-bottom: 16px;\">Verpakking en verzending<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3484\" style=\"max-width: 100%; height: auto; display: block; margin: 12px 0; border-radius: 6px;\" title=\"Verpakking en verzending van motorfietskettingen\" src=\"https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/motorcycle-chain-packing-and-shipping.webp\" alt=\"Verpakking en verzending van motorfietskettingen\" width=\"1402\" height=\"1121\" srcset=\"https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/motorcycle-chain-packing-and-shipping.webp 1402w, https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/motorcycle-chain-packing-and-shipping-1280x1023.webp 1280w, https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/motorcycle-chain-packing-and-shipping-980x784.webp 980w, https:\/\/motorcyclechain.top\/wp-content\/uploads\/2026\/04\/motorcycle-chain-packing-and-shipping-480x384.webp 480w\" sizes=\"auto, (min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1402px, 100vw\" \/><\/p>\n<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>420 motorcycle chain \u2014 12.700 mm pitch, 6.35 mm inner width, curled-type bushing, 15.6 kN tensile strength, 0.57 kg\/m. Designed for 50\u2013125cc scooters, dirt bikes, ATVs, and lightweight off-road machines. Includes 420 vs 428 vs 520 pitch selection guide and lubrication schedule.<\/p>","protected":false},"featured_media":3589,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[2874],"product_tag":[],"class_list":{"0":"post-3586","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-motorcycle-chain","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/motorcyclechain.top\/nl\/wp-json\/wp\/v2\/product\/3586","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/motorcyclechain.top\/nl\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/motorcyclechain.top\/nl\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/motorcyclechain.top\/nl\/wp-json\/wp\/v2\/comments?post=3586"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/motorcyclechain.top\/nl\/wp-json\/wp\/v2\/media\/3589"}],"wp:attachment":[{"href":"https:\/\/motorcyclechain.top\/nl\/wp-json\/wp\/v2\/media?parent=3586"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/motorcyclechain.top\/nl\/wp-json\/wp\/v2\/product_brand?post=3586"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/motorcyclechain.top\/nl\/wp-json\/wp\/v2\/product_cat?post=3586"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/motorcyclechain.top\/nl\/wp-json\/wp\/v2\/product_tag?post=3586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}