you need 170 main poilet45 or 42 needle 3 from the top you will need to adjusted your mixture screw so make sure you take the cap out before you put the bottom of the carby on if you take the tank of and take the 2 brackets from the top of the engine you will just have enough room to change the jets with out taking the carby of the bike and you don’t need a after market pipe if you wont to do any thing to the pipe you can get a insert ballards i would do that last do the jeting it will take a bit get the mixture right but once you turn the throttle and ride