OK, I bought a used 97M900 with K&N filter, open airbox lid, high comp pistons and D&D exhaust. Some of this I was told and some I can see with my own eyes. The D&D carbon pipes had small holes getting larger so I bought a set of stock cans from EBAY. I installed the stock cans and the bike screams where before it was just OK. Question is this, what kind of performance would you expect out of my bike with the parts listed and no jet kit? I dont know if it has a jet kit or not. I am leaning to the no kit because of the power with the stock cans. ???