Originally Posted by
njballa
Yes i was refering to the BF and NR, but also to engines in general. I wonder what the cuts in the sleeve help the engine to do, you know raising port windows and I guess you should lower the exhaust ports and i wrong
the porting is pretty well thought out from the factory
there are many ways to manipulate fuel flows , entry timings, angles and exhaust exiting to create different powerbands
