C90Club.co.uk

Hi everybody,

I have a 1969 C50. I am restoring it (well trying to) I am having some carb problems, I replaced the old carb with a new one I got on line, the bike idles fine but when I hit the throttle it just cuts out,, if I have choke on it won’t cut out when I hit the throttle

The new carb is either faulty or the main jet is the wrong size.

What type of carb is it?

Hi Dave thanks for the reply

I checked the main jet today and it looked the same? So I swapped it out with the old one and was still having the same issue? Do you think I should just clean out the old carb and put it back on the bike? The new carb is lb lippo that’s all the writing I can see on it?

Are there no numbers stamped on the jet?

Original carbs are pretty much always better than the reproductions unless the alloy has corroded and become porous.

I couldn’t see any numbers stamped on it! I didn’t look very hard but I just checked to see if they where similar in size? I swapped them around but and still got the same results

what is the size of the main jet you have in there at present
is it the right size for the carb