perimeter frame

Hey Miniriders, Having recently picked up a bike, after about 7 years without one, I'm back. I heard about the moto nights at LeMans and went down for a look a few weeks ago. It looked like awesome fun, so the search for a bike began. With not much cash to play with I picked up the...

just wondering if its a good idea to get a custom made exhaust? ive got someone that is willing to make one pretty cheap he works at a shop that does Car exhausts but has done a exhaust for his 450 and a few other bikes here and there , this is for my crf50 with 88cc s stage kit , what size pipe...