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Aztechooligan

Counter balance noise after rebuild

5 posts in this topic

My engine went on my 2005 450 a few months back. I replaced the transmission, crank, and counterbalance bearings. It totalled my head, piston, and cylinder.

Checked for run out on the crank and it seemed okay so I reused it. I just put my case halves back together and when I spin the crank it spins freely, but my counterbalance gear makes a clunk sound on each rotation. There is no play in the bearing up and down, but I can move the gear from side to side and there is some play.

Ive been scratching my head trying to figure this out, I took video of the noise I will be posting to youtube in a bit.

Any ideas of what I should look for?

Here is the link:

Edited by Aztechooligan

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Just finished my rebuild, was just in there. Sure doesn't sound like a sound from that counter balancer. Somthing loose or I your mag side kissing that weight ?..... May have to pull that out to inspect the bearing,, but don't sound like a bearing.

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Just finished my rebuild, was just in there. Sure doesn't sound like a sound from that counter balancer. Somthing loose or I your mag side kissing that weight ?..... May have to pull that out to inspect the bearing,, but don't sound like a bearing.

I dont think it is the bearing, it only makes that noise with the counterbalance installed. No flywheel on it yet. Definitly caused by it, but maybe when I install the flywheel and waterpump impeller/sidecase it will smooth out?

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Might be ok,, the gear could be clashing into each other,, once you get the other gear against the crank gear the tolerance from other side of crank may hold it all together. I never spun mine that fast during assembly.

Edited by ttreewalkerr

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