Kawasaki C2SS 120 Air Leak

[curtie94]

I have a 1967 Kawasaki C2SS 120 Roadrunner.

The bike is a rotary valve style engine. So the carb clamps directly to the rotary valve cover.

I have noticed a air leak right where the carb clamps, I have tried rtv and have had no luck.

Has anyone ever messed around with these engines or bike.

If I spray starting fluid around the carb where it clamps the bike will stall out.

It seems to run ok with this air leak but I don't want to melt a piston.

[GregT]

Typically, there is a fiber sealing insert in the carb throat where it's clamped up.
If this has cracked or deteriorated, you may well get an air leak there.
I have no idea if these rings are available - or if they ever were.
Personally, i'd probably make a replacement, but I have the equipment to do it.

[curtie94]

Yeah there is a insert. But it must be worn out.

I was reading on another forum and I guess people have used rubber washers to seal the carb. So I'll try that and let you know how it works.