Paul,<div>If we were at a contest and your model ran like you've typed here, we'd do this;</div><div>Slide the pipe back a 1/4 to 1/2 inch in the coupler by snipping one tie-wrap off, install new tie-wrap to secure and fly again. Peaky goes away, top end not as much, surge probably settles, fly, fly, fly.</div><div>If it just surges going straight up you're almost there, you were just greedy on the lean needle and peaked pipe length.</div><div>The vertical level of your tank to your carb spray bar is something to look at while on the bench at home, should be level with one another, shim tank as close as you can get to level with the carb. </div><div><div>Try to go to the contest on June 8,9 to meet a lot of experienced people to help out. You'll love it.</div><div>Chris...</div></div>