Hi all
So a quick summary
Recently bought a 1971 CL350
It has not really been run properly for approx 10 years.
I've stripped the carbs, cleaned everything, new o rings, checked diaphrams, basically given both carbs a thorough service.
Carbs have been synched both for idle and cable.
Replaced the rubber inlet manifolds and gaskets (also used some yamabond to be 100% sure)
Brand new genuine airfilters
Cam chain tensioner adjusted
Valve clearances checked
Ignition timing set
Tank cleaned
Fuel tap cleaned, new O ring.
New plugs
The bike will start and idle off the throttle at a nice steady 1200 rpm, however 50% of the time if the bike is revved to anything above 3000 rpm it hangs at this speed. I am thinking its the slides that are sticking, will giving them another good clean and perhaps slightly stretching the springs resolve this?
Another issue is I'm getting a bit of smoke from the cam cover breather, I noticed when i removed the exhausts that there was a lot of soot in the exhaust ports. Is there a chance that this will clear up with use, or is it likely that its a worn valve or similatr issue.
I'm not new to old bikes but only ever worked on vintage Yamaha 2 strokes in the past so the 4 stroke top end is a bit of a mystery to me at the moment.
Hope I haven't ramlbed on for too long.
Cheers
Tim
So a quick summary
Recently bought a 1971 CL350
It has not really been run properly for approx 10 years.
I've stripped the carbs, cleaned everything, new o rings, checked diaphrams, basically given both carbs a thorough service.
Carbs have been synched both for idle and cable.
Replaced the rubber inlet manifolds and gaskets (also used some yamabond to be 100% sure)
Brand new genuine airfilters
Cam chain tensioner adjusted
Valve clearances checked
Ignition timing set
Tank cleaned
Fuel tap cleaned, new O ring.
New plugs
The bike will start and idle off the throttle at a nice steady 1200 rpm, however 50% of the time if the bike is revved to anything above 3000 rpm it hangs at this speed. I am thinking its the slides that are sticking, will giving them another good clean and perhaps slightly stretching the springs resolve this?
Another issue is I'm getting a bit of smoke from the cam cover breather, I noticed when i removed the exhausts that there was a lot of soot in the exhaust ports. Is there a chance that this will clear up with use, or is it likely that its a worn valve or similatr issue.
I'm not new to old bikes but only ever worked on vintage Yamaha 2 strokes in the past so the 4 stroke top end is a bit of a mystery to me at the moment.
Hope I haven't ramlbed on for too long.
Cheers
Tim
