mckenzie Posted February 12, 2009 Share Posted February 12, 2009 see first post air filter, dirt in the float bowl, faulty ht coil Link to comment Share on other sites More sharing options...
wild foamy Posted February 12, 2009 Author Share Posted February 12, 2009 Running a K&N filter, carb bowl has been htoroughly cleaned with carb cleaner and is free from sh*t and debris, HT coil is fine as it was running okay on the standard 50cc bore. methink its tuning, most likely rich because it becomes a lot more responsive when i turn the fuel tap off for a few seconds Link to comment Share on other sites More sharing options...
mckenzie Posted February 12, 2009 Share Posted February 12, 2009 Running a K&N filter, carb bowl has been htoroughly cleaned with carb cleaner and is free from sh*t and debris, HT coil is fine as it was running okay on the standard 50cc bore. methink its tuning, most likely rich because it becomes a lot more responsive when i turn the fuel tap off for a few seconds you should try and alter your needle again, if it runs ok when the fuel tap is off then it sounds like its over fuelling Link to comment Share on other sites More sharing options...
wild foamy Posted February 12, 2009 Author Share Posted February 12, 2009 it sounds like its over fuelling that was what i thought but i dont want to down-size the main jet because it is running just about right at the top-end and if i put a smaller jet in it is likely to run lean and chew up a second big bore. so how do i adjust the low/mid range without changing the main jet?, something to do with the pilot jet or a mixture screw somewere? Link to comment Share on other sites More sharing options...
mckenzie Posted February 13, 2009 Share Posted February 13, 2009 that was what i thought but i dont want to down-size the main jet because it is running just about right at the top-end and if i put a smaller jet in it is likely to run lean and chew up a second big bore. so how do i adjust the low/mid range without changing the main jet?, something to do with the pilot jet or a mixture screw somewere? Well it could be your mixture, but to be quite honest, I havent yet mastered the art of carb tuning, this may help you....... http://www.szocimotoros.hu/download/Basic2strokeTunning.doc http://justkdx.dirtrider.net/printcarbtuning.html Link to comment Share on other sites More sharing options...
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