dsaint77

Hey all, I have asked around on other forums about this problem but I still cant get it fixed. I have a 1990 banshee bored out to a 370 with toomey T-5's and single carb kit. I am running a CEL needle, 52 pilot and I think a 162 main jet in a keihin carb. I am running 132 left and 137 pounds of compression in the two cylinders. The Problem: The Shee starts and runs fine but when you go to rev it up a bit it boggs down and refuses to rev up. After a few seconds it revs up but is still bogged down like the motor is loaded up. If you run the machine in the first two gears it still wants to bog, but after your in 3rd and up and you are in the meat of the power band it really screams. I have a honda 250r that is all stock and it revs out like I believe that the banshee should. I have worked on snowmoblies all my life and I just cant straighten out this problem. The wires are all tight and have a good ground its just having issues at the 1/8 - 1/4 throt. Any help would be greatly appreciated Adam

I just bought a banshee that runs pretty well. It is bored out to a 370 and has t-5 and single carb kit. when the powerband hit it hits hard and will either spin out of lift the tires off the ground and try and flip you over backwards in 3- 6th gear. now from idle till high rpms in first and second its pretty lame. I am not sure on a few things but let me tell you as much as I can. pj 35mm keihin carb and it is running a 168 main, the pilot has no number and you cant read the number on the needle with a magnifying glass, the needle clip is located in the highest position. (clip is farthest away from the point on the needle) Now I would like throw away the jets, needle and just start over with things that I know and can adjust. can anyone here recommend which needle and pilot to use? Also it fouls plugs and I am running 32:1 yamalube. the compression is 130 and 128 any help would greatly be appreciated. Adam