Do not run both at the same time. I ran a bottle of star Tron according to the directions then ran 3-4 tanks clean fuel then ran sea foam. That was last year and now that the carbs are done I'll probably run sea foam every few tanks. To me the bike ran better with sea foam but the guy that I talked to last year about doing my carbs swears by star tron so I used both. Made a difference for me last year with the popping. Had the carbs done and got it back today, it's like ridding a different bike, smoother more power and just sounds so much better. He told me the one of the pilot jets was completely gummed up. Good luck and get some estimates 282.00 was with coolant and tax.