1985 kx 80 probs

85 kx80....bike runs good, fires right up...reeds are good, good
compression, clear exhaust pipes...prob is, no power down low, kicks
in the mid range and higher rpm...any ideas on what would cause it to
have the power band up so high? also has stock teeth
sprockets...thanx for any help

 

ok..i have it down tot he power valve set up....anyone have any pics
of the set up and how to adjust accordingly?

 

An 80cc machine won't have much low end power in the first place, you
have to rev the piss out of it to move at all...

But, if you've noticed a decrease in what little power you did have...

Try cleaning out your idle jets and work on richening up the bottom end
of the power band by turning the idle mixture screws a little richer...

Check your ignition timing to make sure it's not too far advanced...