ok guys,im a new sp 400 owner and i love it.now im ready for performance mods.any suggestions .....exhaust,air filter,clutch ect...

 

yes yes and yes... i aint sure what its the best but just wait for some guys who got it to come on here... i think hotseat has some stuff.. but i dont like hotseat that much.
also try aaen maybe

 

Hi welcome. Im new with polaris too. I bought a 99 sport 400. The only thing I did so far is take the oil injector off. I used the Hot seat kit. It was pretty good. I did replace the belt too. Its snowing up here in Mass. so I dont ride much now. Its too cold. Im looking at doing some upgrades too. It is a great quad I think so far. I used to have a 2001 arctic cat 250 2x4. That was the first one. Then I sold it and got my sport. What a difference. I love it. Hope you have some luck with yours. Let me know what kind of hop ups you do. There are a lot of good guys on here and they will help.

Bob