[Rainor]

I'm restoring a 1965(?) Honda S65 and I'm 99% complete. As always it's that last 1% that is the showstopper! :sad:

I have it in with a mechanic at the moment and while it starts easily it won't go past idle. When he turns the throttle the engine noise goes deeper as if it's getting ready to rev but it doesn't. If he holds it on open throttle it will eventually stall.

Any helpful ideas?

Thanks in advance for any help you can give.

Rainor

 

[slumlord]

My guess is that it is adding air without fuel [or more likely] fuel without air. If the carb has a diaphragm, check that for holes and also make sure that the slide is loose. You should be able to see the slide rise up with the air box removed when you hit the throttle.

 

[Rainor]

Thx slumlord. I'll forward this info to the mechanic.

Another interesting aspect of the carb on this S65 is that it has an oil supply from the engine running through it. I think it's to keep the fuel warm due to the long throat to get to the engine.