I bought a used 650R. Pulled the carb and it's got 68s pilot and 170 main. I've read to use 175 main. I ride between 500-3800 ft. elev. It starts and runs great. The exhaust is Big Gun w/header. Airbox appears stock. I want to put in a Uni and pull snorkels. Is the 170 ok or should I get a 175 ? T.i.a.