Can't figure this one out!


7 replies to this topic
  • firemanmatt82

Posted March 20, 2011 - 05:40 PM

#1

I have an 01 YZ426. I'm installing a new chainand gears in it. However, I can't seem to get the drive sprocket off. One of my reasons is I can't figure out what size the nut is that holds the sprocket on. 2nd, Is it a reverse thread nut or is it the old "lefty loosy, righty tighty" kind of nut. Thanks for any help you can provide.:thumbsup::worthy::bonk::worthy:

  • ttr250dude

Posted March 20, 2011 - 06:50 PM

#2

It's the standard lefty loosey righty tighty. Youre gonna have to hold your rear brake pedal down so the bolt doesnt just spin. Measure the nut with a tape measure or use a micrometer. If the micrometer reads something like 1.21" get a 1 1/4" wrench.

  • brentn

Posted March 20, 2011 - 07:38 PM

#3

The rear brake pedal trick worked for me, I used a long pole to engage the brake with my left hand. Then using my right hand, a breaker bar and a socket, gave the CS nut a good sudden jerk to the left and it came loose.

  • gscx

Posted March 20, 2011 - 07:44 PM

#4

You do know that you have to bend back the lockwasher that is holding the nut on right? That might help you with not knowing what size nut it is

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  • ttr250dude

Posted March 20, 2011 - 07:52 PM

#5

You do know that you have to bend back the lockwasher that is holding the nut on right? That might help you with not knowing what size nut it is


haha yeah that too. Just bend it with a flat head screwdriver and hammer.

  • jcm3

Posted March 20, 2011 - 08:02 PM

#6

You do know that you have to bend back the lockwasher that is holding the nut on right? That might help you with not knowing what size nut it is


Yeah, I just swapped out the chain and sprockets out on my 2001 yz426, and when I got the lock washer off, the bolt came off with my hand. :thumbsup:

I used the same process that I used for my flywheel to torque the drive sprocket bolt, which was to put the bike in 5th gear and lock the rear wheel with a 2x4 through the spokes.

To take it off, an impact gun would work just fine, if you have one.

  • brentn

Posted March 21, 2011 - 01:12 PM

#7

Electric impact guns are getting pretty cheap these days. Just picked up a mastercraft with 220ft lbs of torque for 39.99, regular 129.99. Came with a few impact sockets and a case, you really can't go wrong with something like that. Next time I have to remove the CS or clutch hub nut, going to break this bad boy out!

  • gscx

Posted March 21, 2011 - 01:16 PM

#8

I really hate using a impact wrench on stuff like this. I feel like im going to break the shaft or something stupid when I really have to put pressure on it.





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