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Discussion Starter #1
First off, hello, I'm Glen, I'm a Ducati addict, started with VWs and that was just a gateway.. My addiction has taken a lot of money and ruined relationships, I figured I should move onto a more affordable habit...In anycase, I've taken on the project of figuring out what the issue is with my friend's CL 350. First thing Id was a compression check, as it feels it's running on one Cylinder. 60, 60, 60, 60.... other cylinder, 135,135,135,135...This is a stock bike with 12k on the clock. Of note is white smoke out of the low comp cylinder (the left if that's of importance).
What are the next steps I should address?
Is this generally a head/valve issue? Cylinders/pistons/rings? Any input would be welcomed! Thanks a ton.
 

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Sensei
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Glen, I assume the measurements were made hot with the throttle wide open....
If so, the top end needs rebuilt...... 170 is the normal compression with a 15 PSI maximum variance... It needed re-ringed at 155....
 

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Discussion Starter #3
Wellll, the motor was hot but no WOT... just cranking over until the max reading was reached. Re-ringing isn't out of the realm of what I Imagined was the issue in anycase. Tomorrow I'll try WOT after warming up, although in either case, it'll be that one cylinder is totally lacking.

After further reading tonight I learned to put some oil into the cylinder to find if it was rings or valves. I'll also try that.

I forgot to mention in my initial post that the suspect cylinder was blowing baby blue smoke...
 

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Sensei
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Baby blue huh?..... Ya think any oil is getting past the worn rings?....LOL....
It won't hurt to add oil and ascertain if there is also a valve problem, although that might not be readily apparent with such low compression......... I'd just tear it down now, physically check/measure each component, and order what I needed to put it back to specs.....
 

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It could be a blown head gasket too. Are you getting visible smoke out of the breather when it's running?

That's the problem I had when I recently pulled the head off my 450. Either way, it's going to have to come apart.
 
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