If you buy a K&N, I would highley suggest a Dynojet Kit to go with it. The air filter installation is very easy, put it right in where the stock one goes tighten the clamp and that's it. Some people trimed up the parts of the aix box to help it fit better, but I didn't have to. I woud suggest using a prefilter, you won't have to clean the filter itself as much.
The Dynojet kit contains an assortment of main jets, a shorter carb spring (for quicker thottle response and gets rid of the bog), a new needle, and a shim for the needle. There are instructions telling you how to do it, but if you have never done it before I can instruct you how to do it.
With both of these modifications, it gets rid of all the low end bog it has right off the line. It will wheelie with no problem. It helps it mostly in the low and mid range. You will also notice quicker revs with the filter and jet kit. Tell me what you decide on and I can help you out.
The Dynojet kit contains an assortment of main jets, a shorter carb spring (for quicker thottle response and gets rid of the bog), a new needle, and a shim for the needle. There are instructions telling you how to do it, but if you have never done it before I can instruct you how to do it.
With both of these modifications, it gets rid of all the low end bog it has right off the line. It will wheelie with no problem. It helps it mostly in the low and mid range. You will also notice quicker revs with the filter and jet kit. Tell me what you decide on and I can help you out.