Update:


I made some adjustments to dial it in and performs really well so far. Initially, the plug was showing a lean condition and I wasn't quite getting to the same top speed. I took the block apart and plugged the hole for the pump on the carb it came with and cleaned and reapplied RTV. I also moved the slide needle clip down a notch to raise the needle. I also added about an inch to the exhaust header. This combination has restored the top end of the motor yet the idle is a little ruff.

the torque is definitely stronger. It has this little hop to it now where the front wheel comes off the ground a few inches when you let the clutch in and throttle up.

It is maxing out the rpms without hitting WOT and I will probably be getting a smaller toothed sprocket to help out.

I still believe there is some uncorked goodness in the engine that can be gained from doing some porting. Before I get into all that I am going to hook up the walbro and try running it to see how it performs before pulling the cylinder off.


So far so good. The only thing I would really like to change about the set up is having a chunk of plastic, like the reed valve is made of, instead of using those metal plates. I have 50cm intake studs now with 1cm anchoring the other 4cm on there. But hey, it least its working.