Enter your Chain Size/Pitch, Countershaft Sprocket Teeth (A), Rear Sprocket Teeth (B), and Center Distance into the Motorcycle Chain Length Calculator to find the exact number of chain links required, plus your total chain length in both inches and feet — so you buy exactly what you need, no guessing.
Chain Links Required
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Chain Length (inches)
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Chain Length (feet)
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Measure the distance between the center of the output shaft (front sprocket center) and the center of the rear axle. This measurement should be taken with the bike on level ground and the suspension at normal ride height.
Chain links are manufactured in even numbers because chains use master links or connecting links that require pairs. Using odd numbers can create stress points and reduce chain life.
The axle adjustment shows how far to move your rear axle forward (-) or backward (+) from your measured center distance to make a specific chain length fit perfectly. This helps you choose the right chain length for your adjusters.
For every tooth larger on the front sprocket, add 1 link to the chain. For every tooth smaller, subtract 1 link. Rear sprocket changes have a similar but smaller effect on required chain length.
Yes, this calculator works for common motorcycle chain pitches including 420/425/428 (0.500"), 520/525/530 (0.625"), and 630 (0.750"). Select your chain pitch from the dropdown for accurate calculations.
Chain pitch is the distance between chain pins, measured in inches. Different motorcycles use different pitches - smaller bikes typically use 420-428, while larger bikes use 520-530 or 630 chains.
Most motorcycles require 1-2 inches of chain slack at the tightest point of rotation. Always check your owner's manual for specific requirements as too tight or too loose can damage the chain and sprockets.
Yes, always double-check measurements and ensure your chain adjusters will be near mid-travel with the calculated length. This provides room for future adjustments as the chain stretches with use.