I am fairly new to the two stroke and snowmobile scene and was wondering how to go about checking the runout on my crank. I don't think it matters but the sled is an 08M1K.
How to Check Crank Runout
- Thread starter Ausm7499
- Start date
Dial indicator
Leave your crank in your case half (make sure it is seated if the case halves are opened) and with a dial indicator touching your PTO side turn the crank (slowly)360 degrees and watch the dial indicator. It will move, they all do, but there is a tolerance of maybe .000 to .004 of an inch(not sure on the spec). Do the same on the mag side.
SPDFREEK
Leave your crank in your case half (make sure it is seated if the case halves are opened) and with a dial indicator touching your PTO side turn the crank (slowly)360 degrees and watch the dial indicator. It will move, they all do, but there is a tolerance of maybe .000 to .004 of an inch(not sure on the spec). Do the same on the mag side.
SPDFREEK
can you check it on a sled with the motor still in it.
Set the crank in a V block on the center bearings. This way you make sure each end is running true to the center bearing. I like to get each end within .0005 TIR. max.
MNF7
MNF7
A
ACMtnCat
Well-known member
Yes you can. Not as accurate as others.
Clamp/magnetic the guage to the frame or block and pull a plug out so the pull rope pulls easy and pull the rope slow and smooth.
How do you straighten the crank if it's not good? Hammer like a fool or?
