Stock pipes, K&N air filter w/pre-filter, no box lid. Does anyone know the proper jets to install?

 

Try going with a 145 LM 150 RM, with the lid off you could probably also try 150/155. I wouldn't suggest going higher without at least a slip on. I hear the GYT-R exhaust works quite well, but it is pricey. If you buy a jet kit from Yamaha it gives you a few different options and suggestions for jetting with what setups.

 

You might also want to change out the needle and spring that youget if you buy the jet kit. It also depends on where people live. I am sure mine would be different then somone who lives in texas....so ask your local dealership or someof your buddies in your area!