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cub problem


dubbin337

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I had my 400cc cubs with CPI inframes and 35 mm pwk with CEL needles, 48 or 50 pilot, I think, and 170 mains, and it screamed. I had the same problem with an occasional dead spot when you get back in the gas. I think the taper of the CEL needle has something to do with the problem.

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have you checked your coolant bottle? One time I had a compression O-ring funked up on my head, and it was leaking a small amont of coolant into the cylinder causing it to miss every now and then.

 

I dont run a coolant bottle, but I kept the overflow hose in the stock location. After riding it I could tell there was coolant coming out of the overflow hose. At first I thought maybe I just got the rad. too full, but after a few more rides I could tell it was getting worse.

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  • 2 weeks later...

I finally got this thing running perfect but the jetting isnt really much different from what i started with. I went up to a 170 main, kept the 48 pilot and cel needle in the middle. i cleaned the carbs and installed a pingel valve and this thing was flying. i took it out to my riding spot and there wasnt anyone that could come close to me. The fastest bike out there until i got there was a quadzilla with some work and i beat him by about 7 bikes. Thanks Jeff for an awsome motor.

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Im glad you listened to the builder and didnt put like a 148-150 main or something in it! ;) Might have been catostrophic. :( Sounds like we had ya close from the start! Glad your whippin up on them with your new ride!!!! :clap:

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Yea jeff you pretty much set me up with the perfect jetting from the start. i really just cleaned the carbs, installed a pingel and gutted out my gas cap and this thing was running great. I also ran the 170, which seemed like you were kind of leaning toward that jet from the begining anyway. Thanks for the help.

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Yea jeff you pretty much set me up with the perfect jetting from the start. i really just cleaned the carbs, installed a pingel and gutted out my gas cap and this thing was running great. I also ran the 170, which seemed like you were kind of leaning toward that jet from the begining anyway. Thanks for the help.

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Another point for Jeff...I'm going to give the shee a ring job next season...O'boy ..more than rings could be coming UPS.....lol

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