Alex! Posted May 13, 2007 Report Posted May 13, 2007 Anyway, I just wanted to keep you guys updated. I rebuilt the top end of my bike and fired it up yesterday - 1 heat cycle. I have to order jets, the smallest I have is a 160 main and 55 or so pilot (PWK 35mm) - way too rich.My mods are 0.020 over factory cylinder with a port job (local builder) and 19cc domes, CPI pipes, V force 3 reeds, etc. After running it for a while I did a compression test and both cylinders were at 145-147 - I noticed the tester did not have as long of threads as the spark plugs do - I was hoping for a bit more compression than this. Maybe I should have posted this in the other forum... Quote
locogato11283 Posted May 13, 2007 Report Posted May 13, 2007 id say youre gonna need 158 to 162 main jet and 42 to 48 pilot.. i think youll prolly settle with 45 pilot and 160 main. thats pretty typical for those carbs.. as for your compression were you using a good tester? with 19cc domes i would think youd have a little bit more than that. im thinking up near 170 pounds.. might wanna talk to your builder about that. Quote
Alex! Posted May 13, 2007 Author Report Posted May 13, 2007 Would it have made a difference if we didn't hold the throttle open while kicking for the comp. test? Quote
fastbanshee8 Posted May 13, 2007 Report Posted May 13, 2007 Would it have made a difference if we didn't hold the throttle open while kicking for the comp. test? Yes, that would make a big difference. Always hold the throttle wide open, while checking compression. Quote
XxMeltIcexX Posted May 14, 2007 Report Posted May 14, 2007 Yes, that would make a big difference. Always hold the throttle wide open, while checking compression. i still wouldnt see him get that much compression without WOT , lmao you holding half throttle? if your not using any and your getting those readings, somethings wrong.. Quote
Alex! Posted May 14, 2007 Author Report Posted May 14, 2007 We'' try another test with the throttle open and see. Your saying it should be roughly 170 psi? Quote
Alex! Posted May 14, 2007 Author Report Posted May 14, 2007 i still wouldnt see him get that much compression without WOT , lmao you holding half throttle? if your not using any and your getting those readings, somethings wrong.. Are you saying the compression is too low or to high? Quote
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