Hi all, my 400s developed a bit of surging at steady throttle cruising speeds so a had a tinker around. Settings are.... CV carb 3x3 Twin air filter full CRD pipe DJ kit 140 main stock pilot clip 5 3 turns stock fuel screw The odd thing is after reading Eddies pilot setting procedure i found the idle didnt even out until 3.5 turns on the screw. So in went the 25 pilot and it still wont even out until 3.5 turns, and runs way too rich at idle. With either pilot if i get the motor nice and hot then give it a blip off idle the revs go up, then down, and almost cuts for a second before a smooth idle again. What could cause that as its allways bugged me that its never really had a nice clean crisp sound when revved and had slow responce to the throttle?? As for the surge, well going to clip 5 helped. It also had loads more low end torque. So i thought, 142.5 clip 4. That pulled much harder up top but not so much low end so im at the above settings for now with still a bit of surging.