Pros

Alot of work has been put in to the enginge with alot of technology in it. It has a o-ring below the cylinder head to stop dust getting in. The exaust port is turned upside down and the porting inside the engine is excellnt. The best thing about the engine is that there is a orange piece of plastic (epoxy) in the cranckshaft where the carberator sits above it. So under the carburetor in the engine on the crank shaft there is a epoxy filling to make fuel slide inside. I cant really explain it much better. It is a engine specially for the buggy racer the power band of it is so smooth which is called a linear power band. There is also so much of it. Very good on fuel economy

Cons

none really. The a bit expensive but it is so good. Not for a begginer. If you are a serius racer grap this engine

Comment

i have had a race meeting in newcastle (new south wales, australia) and in qualifing i was using a rb worlds 1 and i was just a bit slower than the fastest time. In the final i put my dads nova rossi s421b and it was excellent i was actully 1 second a lap quicker than the fastest guy out there