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Posted
I am still thinking around 320 to start on the main.

Give that a shot & see what shee does. I'd leave the pilot stock 1st & try it with just the bigger mains. I'm running 280's in mine & I'm about 300' above sea level.

Posted

It sounds like you have an air leak or something . perhaps ignition problems?? Flames is not good. And don't hold it WOT untill you figure out the problem and fix it.....

Posted

Check the plugs and the plug caps.They been known to go bad also.I use to run 17cc domes.I had 214lbs of compression.It didn't hurt anything.I use vp c 12 race fuel worked great.I had 300 main jets,but I'm in south at sea level,not quite where you are.The only thing about using 17's domes it will slow you down some on the top end.I later went to 19 cc domes to gain my top end back.The 17 domes help with throttle response,but you can put more timing in it for that instead using 17cc domes. B)

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