jack_h Posted September 1, 2008 Report Share Posted September 1, 2008 (edited) hey all, the plug on my 04 beta keeps coaking up till the point in which the bike cuts out. what could be done to stop this happening also, the bike starts without any choke. thanks in advance Jack Edited September 1, 2008 by jack_h Quote Link to comment Share on other sites More sharing options...
yamahaty250xox Posted September 1, 2008 Report Share Posted September 1, 2008 too rich? Quote Link to comment Share on other sites More sharing options...
jack_h Posted September 1, 2008 Author Report Share Posted September 1, 2008 too rich? yer Quote Link to comment Share on other sites More sharing options...
yamahaty250xox Posted September 3, 2008 Report Share Posted September 3, 2008 (edited) what oil are you using and how much? if its semi-synthetic it should be 70:1 if fully synthetic it should be 80:1. what colour is the plug burning? it should be a biscut/ chocolaty colour if not and your useing the right mixture, then its time to fiddle with the carb. doh! just read your origanal post. if it starts without any choke it must be the carb. the bike is running too rich so you need to use the mixture screw to lean it up. max Edited September 3, 2008 by yamahaty250xox Quote Link to comment Share on other sites More sharing options...
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