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MX | Off-Road Gear Info & Reviews
New rear sprocket???
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[QUOTE="Jaybird, post: 753753, member: 22283"] You asked for it, and I gave it to ya. :) It really doesn't take much time to maintain your drive properly. You simply need to know how to do it. But I agree, some have different priorities. Brand new side plates will have a minimal amount of elongation due to the metal actually stretching. But initial stretch is very very minimal, and many mfg's are now "proof stetching" the chains at build to eleminate the consumer having to make any adjustments due to this stetch. But I completely disagree with you on where the chain rides when it elongates. It is a fact that the chain will not ride as intended when it elongates. No, it will not measure under pitch by "pushing" the chain together. Take a stretched chain apart and you will see that the pin has only one area of the circumference that has a worn spot on it. These worn spots will always be to the inside of the link. There will also be worn spots on the bushings, but they will always be on the outside of the bushing reel. Only if the wear was around the total circumference of the pin or bushing would what you say be true. When a stetched chain is on a new sprocket set, or a hard sprocket set that has no deformation of the teeth, the teeth have a very hard time meshing with the links. The driver has trouble gettin into the link, and the driven has a hard time getting out of the link. And I agree that with this, the sprocket teeth can become compressed and deformed from it, but it is still wear due to pitch variance. The brute force of the bike will not deform a perfectly matched pitch set. However, when the chain has elongated, then the force of the bike does in fact come into play and helps accelerate the demise of the teeth. Take a hard sprocket set-up and mount a chain that has a pitch of more than 2% new. You will notice that it makes alot of noise when you spin it. Also, it will not spin freely...it stops very soon. Now mount a good chain and spin away. Less noise and keeps spinning. (Scott...I will give you an E for effort. :flame: ) GREENBEAN, Pulling the chain away from the sprocket to check elongation is a junkyard way to measure and is hardly accurate. Although, due to the chain not being of the original pitch, you can pull it away from the sprocket. Learn the correct way to measure a chain. Also, there is no reason whatsoever to change out a sprocket that has no wear on it. It is good rule of thumb to change out both because many run both till they are trashed. If you have a theory on why we should do this, I'm all ears. [/QUOTE]
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MX | Off-Road Gear Info & Reviews
New rear sprocket???
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