New Big Bore Kit Fitted

got the engine back together tonight with the new big bore cylinder and piston. It’s now 149cc. I took it for a little ride up to the shops and everyone was looking at it.  Still some work to do with re-jetting the carburettor, I went up two sizes on the main jet and raised the needle to maximum and now it’s way too rich. Better too rich than lean, but I’ll sort it out tomorrow. Still need to finish the front mudguard and modify the instrument bracket to hold a tachometer.  My Christmas present from ange is a MIg welder so I can do those other little jobs over the Christmas holidays.

Engine out for a Paint Job

After the seizure (which I reckon happened long before I bought this bike), I decided to remove the engine and paint it. I’m going to split the crankcases and make sure all is ok inside. Going on what I found in the sump of the 51 year old C100 I suspect it’s full of old oil/tar/sludge, which has reduced it’s liquid oil capacity. New gaskets on order and seals all ready to be fitted. With the big bore kit too, it’ll be better than new. I’ve got all new cap head allen screws to go in the cases too.

CG125 engine painting
CG125 engine painting