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Author Topic: crank bearing tolerance?  (Read 2080 times)

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Offline tschisi

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crank bearing tolerance?
« on: June 09, 2010, 04:33:26 PM »
Hi!

I noticed that when i check my crank bearings with pushing the rod, there is no clearance.
But if i grab the flywheel i can move the whole crankshaft about 0.5mm up and down.
Could this be ok?
On my CRF it is ok because there is a roll bearing on this side.

thx
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2004 kx125
1990 kx500 (sold)

Offline bob larry

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Re: crank bearing tolerance?
« Reply #1 on: June 10, 2010, 12:56:35 AM »
Shouldn't move up and down at all

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2001 KX500

Offline oic0

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Re: crank bearing tolerance?
« Reply #2 on: June 11, 2010, 08:54:50 AM »
Yep none at all, mine doesn't even have a hair of budge when you tug on the piston.
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2000 KX500
1998 Warrior, with RD350 engine (Blown up)
1973 RD350 (In storage)

Offline tschisi

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Re: crank bearing tolerance?
« Reply #3 on: June 11, 2010, 08:40:29 PM »
Well, on the piston mine also doesn?t...
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2004 kx125
1990 kx500 (sold)

Offline jonny500

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Re: crank bearing tolerance?
« Reply #4 on: June 12, 2010, 05:17:34 AM »
there should be no movment on the mains. if you run the bike like that you risk doing damage to the crank, crank cases, flywheel and stator plate. besides that on a k5 your teeth will probably fall out with the vibrations. lol
john
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