My 185s has a stock 98 main jet. It sputters when I open it up all the way. I put a cobra megaphone exhaust on it, uni filter, and took off the air box lid. Does this mean I have to move to a higher main jet? Thanks.

 

it probably would not hurt to change it to a higher one. You can get a set of 6 off of denniskirk.com for about 20 bucks. You can put each one in and see how it runs. Or you could move you needle clip down a notch or two and see how it runs.