Drive chains for Yamaha YZ85, YZ125, YZ250, YZ250F, YZ450F and WR: DID, RK and Regina in standard, O ring and X ring.
The full size YZ and WR run a 520 chain, the YZ85 a 428 and the YZ65 a 420. Stock lengths run 114 to 118 links on the full size bikes, and a 120 link chain cut to length fits any of them.
Change the chain with the sprockets and all three last; a new chain on hooked sprockets stretches in a few rides. Members pay the member price on every product in the store and get free standard shipping on orders over $10. Membership is $5 for the first month.
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The full size YZ and WR run a 520 chain, the YZ85 a 428 and the YZ65 a 420. Stock lengths run 114 to 118 links on the full size bikes, and a 120 link chain cut to length fits any of them. Buy a 120 link chain and cut it to the length on the swingarm sticker or in the manual.
Standard (non O ring) for motocross: lighter, less drag and cheap to replace. O ring or X ring for enduro and trail, where it lasts three times longer and needs less lube.
Most bikes want 30 to 40mm of slack measured at the back of the chain slider with the bike on a stand. The manual gives the exact figure. Too tight wears the countershaft bearing fast.
Not sure what fits? Set your bike at the top of the store and every list narrows to parts with confirmed fitment, or message us with your model and year.
