Honda st70 12v engine

does anyone have a good one they want to sell me? I have an 89 st50 and I want to put a 70cc engine in it.

I'm in Essex. Thanks a lot

If you going to stay with a honda engine why not go with the CUB 90cc engine?
Or rebuild your 50?

I'd be interested in your 50 engine if your going to sell it.

i want to keep the original thanks. what can i do to rebuild it??

It depends on its condition and what your trying to do?
More speed?
More gears?
Manual clutch?

If it were mine I'd drop a 4 speed in it, convert to manual clutch and stick an 88cc cylinder / piston in it.

condition is great. I just want the speed of the 70cc. Nothing else really. And def want to keep it semi auto

Just get a barrel and piston then