powervalve governor adjustment

[5004life]

my 87 kx 500 has a bog in the midrange if u shift it a gear high , fresh top end,pro circuit pipe and 13/52 gearing......im thinkin it is the powervalve because at an idle the actuation rod is never all the way in , is there a way to adjust the powervalve governor?

[cbxracer30]

Are you sure you have the powervalves installed correctly ? The marks on the the gears aren't alignment marks. Also make sure you have good fuel flow [screen clean on petcock] & not sucking the bowl dry on the carb. CBX

[kwakman]

just had a look at my 86(same powervalve design) and the round disc at the end of your p/v rod should have a gap when fully pushed in of 5-6mm.HTH.K.

[5004life]

Are you sure you have the powervalves installed correctly ? The marks on the the gears aren't alignment marks. Also make sure you have good fuel flow [screen clean on petcock] & not sucking the bowl dry on the carb. CBX

thats what the manual said though

[5004life]

anyone else

[amra500]

water in the carb, mine did that but it was on top that it bogged

[kwakman]

if it was pv out of sync, you would have a dodgy midrange all the time, shifting up a gear wouldnt make it any worse, just increases the load on the engine.if you can wind it out in a low gear and its ok, i would look to it being rich in the midrange.

[5004life]

im pretty sure its jetting now guys i moved the needle clip up and it runs a lot better now