Cam Cap/Tower and Cam damage.

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Mar 24, 2026 | 09:31 AM

#11

zeroptzero

Joined: Oct 2009

Posts: 29,896

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From: Ontario Canada

main bearing damage will kill the crank as well, so might as well check that after the rods. A lot of people say rod bearings are the first to fail, but I found out the hard way that main bearings certainly fail and I found chunks of them in the oil pan when my motor failed.

Mar 24, 2026 | 01:30 PM

#12

RavenYZF-R6

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Joined: Mar 2026

Posts: 6

Likes: 2

Quote:

Originally Posted by Billman250

The cam cap bolts were loose because the caps melted from oil starvation. This is not a bolt torque issue.

Is the front cam drive gear bolt tight? 8mm allen bolt.

I just checked and yes it is quite tight. All the cam gears look healthy.

Last edited by RavenYZF-R6; Mar 24, 2026 at 02:40 PM.