99 Front Sprocket Socket??

5 replies to this topic

Posted October 27, 2008 - 05:52 AM


What size is the giant nut holding the front sprocket on?? (99 WR400)

Searched and can't find it..............


  • flyer05

Posted October 27, 2008 - 10:12 AM


Belief a 22mm


Posted October 27, 2008 - 10:57 AM


I think its bigger, my 28 and 30 didn't work...............(too small)

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  • byggd

Posted October 27, 2008 - 12:31 PM


Just stick an open end adjustable on it, close it down/remove and measure the gap. :lol:

  • glentron

Posted November 21, 2008 - 08:29 PM


It's a 32mm on my 99 WR 400. Use a little heat on it if you can't break the nut loose. You may have to apply your brakes to hold the bike still or you can put a bar through the rear wheel and rest it on the swingarm. My daughter put the brakes on while I broke the nut loose and it worked good.

  • seehogs

Posted November 22, 2008 - 08:23 PM


1 1/4" 6 point has worked for me in the past. 45 foot pounds torque. Hold rear brake with your foot to loosen/tighten.


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