My Super Rat Experience
It seems that this engine is a little temperamental, to say the least. It is expensive, it comes with a big carb, integrated CDI and a whole lot of problems. This is my motorized bicycle Story:
Bought the SR engine ($200.00) from Piston Bike and received it in a very short time. Bought the bicycle at K-mart and dove in to putting it together. My second run went all wrong. The engine started making funny noises and did not wanted to cooperate.
Well, This is my second build and have some experience with the whole mounting business, but this one.. All I am going to say to the people that have purchased one of these engines is. MAKE SURE EVERYTHING IS TIGHT! Checked all screws and bolts and all of them were loose. From the valve cover to the carb top screws. The muffler screws I was able to remove them with my fingers. Those had to be replaced. It is running now with some Manic parts and screws (i.e. back sprocket) and hopefully will outlast my last build (7 months Grubee gt5 66cc).
That's my story