HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
ccie2be

rear sprocket allen bolts

7 posts in this topic

I have a 2006 yzf 450 with a slight problem. When trying to remove the allen bolts that hold on the rear sprocket, the allen head socket I use is just spinning through. I have ruined 3 bolts now. Has anyone else experienced this? I guess I will have to drill them out.

Share this post


Link to post
Share on other sites

Hold the bolt and turn the nut. That's the correct method anyway, whether loosening or tightening. Occasionally you can find a Torx bit that will bite when driven into the Allen socket, or try the same thing with the next largest English size. Still, turn the nut, hold the bolt.

Share this post


Link to post
Share on other sites

Ditto, put the pressure on the box end wrench on the nuts on the inside flange of the hub, not the allen head screw on the outside of the sprocket.

Share this post


Link to post
Share on other sites

Whatever you do make sure you put blue locktight on the threads before you put it back together.

Common problem is they come loose.

I do not know of too many guys that touque them, i think most pull them up tight with locktight.

and tighen them up in a cris cross patern.

Clean all the dirt ou behind sprocket where it mates up.

Just my 2 cents :bonk:

Share this post


Link to post
Share on other sites

I am a huge believer in torqing the sprocket bolts. I have destroyed 2 rear hubs because of sprocket bolts. It is my belief (this has been debated on the site also and I hate to get into it again), and others also, that if you over tighten the bolts they become fatigued and no amount of locktite will stop them from coming loose. All you have to do is fatigue the thread area of the bolt not the whole bolt and you have problems. Since following torq settings, and replacing a bolt if it does become loose, once loose it's subject to extra forces from the drive train, I and my group have had zero problems with sprocket bolts. I also Locktite before torqing.

Share this post


Link to post
Share on other sites

This doesn't apply to the sprocket bolts since they have nuts on the back but I'm going to throw it out anyway.

I find a good trick to get a stuck bolt out is to give the head a good whack with a flat ended drift and a hammer before you put the allen key to it. ONE single shock usually breaks the threads of the death grip that can round off allen heads and 9 times out of 10 they loosen up and come out. I find this works extremely well with steel bolts in aluminum.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0