I have a crf80 and the thing wont start. It backfires alot and when I do get it started it will only run for like a minute. Anybody know what could be wrong with it? Thanks

 

change the plug

 

Check the plug?
Carb is dirty?
intake ok?


ummm lemme think of some more.

 

The plug has spark (almost band new), fooled around with the jetting, has gas kicked that biyatch for like an hour and nothing.

 

has it been sitting up

you said you changed the jetting that may be the problem

 

wanna sell it?

 

hahah no thats ok. I found out the problem, turned out it was runnin a little lean so I unscrewed the pilot jet about a half a turn and now it starts first kick plus I got rid of that off the start stumble.

 

wonder who figured that out?

 

Never hurts to run a bit of carb cleaner through it. I got a bottle the other day and it's for cars so the little $4 bottle got into my Z400, my Ozark, my fiddy, and my tractor. Even on my Z which is only 3 or 4 months old and the fiddy only a year old it gave a noticeable power gain and ran 100x better. It's a good investment.

 

From behalf of myself and mr. 250Rrider, we would like to offer our hand in graditude to the all mighty Fiddy Engine God, Mr. Fabulous5.


THanks for your help man!

 

Thanks alot man for all your help. :YEAH

 

not a problem my friends.

 

You are jetted lean or your vavles are shot. If you constantly rev the crap outa it (you hit rev limiter alot) its prolly your valves. If not, play with the air screw and get a richer main.