1986 Cr 125 (HELP!!)

I have a 1986 Cr 125 and i can't seem to get it to fire,it has copression and it gets a spark but for the life of me i can't get it to run.Does anyone have a suggestion?

Have you checked the contact breaker points. I had an old mx bike when I was younger. We tried everything, topend, checked the spark, carb, etc. It ended up being the contact points were wornout. I bet thats what it is. They are under $10 but kinda of a pain to change. You may need a special $30 wrench to aid in replacement.

Hello,when you say compression,how much? should read 125lbs give or take some,try bump starting the bike,also if the bike has been sitting there could be gas in the crankcase.but if you have spark and fresh premix gas,should kick over.also take the carb off and clean it,they tend to get messy with the premix oil,as for contact points this does not apply to your bike..hope this helps...

ake th moter aprt and look for black sludge itll kill ur bike clean that and as well take the top of the cylinder off and see if the piston moves

and u may hav a short circuiting spark plug cap