Sheared Rear Sprocket Bolts?

8 replies to this topic
  • bobwombat

Posted September 18, 2001 - 11:58 AM


had anyone had experience w/sheared rear sprocket bolts? any problems w/bolts backing out at all? tips/tricks re: properly installing the bolts is appreciated. thx, forum....

  • John_in_Long_Beach

Posted September 18, 2001 - 02:59 PM


Yes my rear sprocket bolts were loose, even though they are locking it is good to check them.

  • slashman

Posted September 19, 2001 - 08:44 PM


hey bob are you ready to ride yet. this friday east valley(afternoon). or saturday. e-mail me at

not yz timmed yet
some mods


Posted September 20, 2001 - 03:21 AM


RSK and I recently had the extreme displeasure of watching one of our YZ250 brothers completely shatter a hub, destroy a chain wheel and chain guide coming off a 3ft terrace in a pasture. He had never checked the bolt torque in a year of riding....It caught up to him in a very expensive way...

Bonzai :)

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  • lewichris

Posted September 20, 2001 - 06:58 AM


If you are ever in a pinch and you lose one a nylon wire tie works well for an emergenct to get you back to your truck. Not a small one though. Use a big thick one. Of course this is if you lose one or two bolts.

If life is not a blur. You aren't going fast enough

  • Maicoman

Posted September 20, 2001 - 07:31 AM


Add my 250 F to the list,
luckily they were only starting to get loose, and yes I checked them several times before.
I retightened with a different type of "Locktite", let's see if that works.

  • mike_dean

Posted September 21, 2001 - 02:10 AM


Make sure you are not adjusting your chain too tight, putting extra pressure on the sprocket. mike

  • bobwombat

Posted September 21, 2001 - 07:52 AM


good thought, mike. thx to all for your input....bobwombat

  • MLN

Posted October 01, 2001 - 05:45 PM


Yes, When I first got my 01 426 I started going through rear sprocket bolts. The first 2 that sheared I blamed on myself for not checking the tightness. The second 2 I found right after they sheared to find a ring of rust on the core of the bolt. I am convinced that there must have been a defective batch of bolts produced. I now have replaced all my sprocket bolts and have over 2000kms on them trouble free.



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