Timing / carb issues. Any ideas.
Just rebuilt my TRX 450 R with a 470 kit. 96 mm piston. It was running great before with huge bottom end power. I don’t know what cam it has but I know it doesn’t have the stock cam. The cam has a number three engraved in the gear side with no notches on the other side, and Had a big valve head. Now have a stock head. Original jetting was 180 Main 55 pilot. And stock carb. And I already had the 470 kit to begin with. Now with stock head it acts as though you’re hitting the rev limiter around mid RPMs with wide open throttle.Any ideas would be greatly helpful please.