I have a strobe spur gear and I don't know its gear pitch. Also I need a exhaust for a 2.5 engine a pull start and a good clutch that fits a small block engine. Any ideas?? Please help.

Get a Kimbrough spur gear (same pitch as the stock CB) THS exhaust and a TRX 2.5 or 3.3 pull start, they are the same. Look on flea bay.