Inliners International Forums General Discussion Engines 250 flat at full throttle

I have a 235 with the same carbs hei and headers. I was having the same issue. The issue was the carbs were opening too much too quickly. I think its safe to say your secondaries are opening fine if you can work up to wide open slowly and still run fine. I set my secondaries to only open a max of about 75%. Works perfect now.