I have a 2005 Kawasaki klx 125L, I have only had it for about a year now. I pulled it out of my shed, and I havent ran it in about a month. When I hit on the throttle in neutral it runs fine, but when im in 2nd gear and above, it bogs out. I checked the spark plug, the air filter, changed the gas tofresh gas (gas might have been old). How can I solve my proplem without it bogging when I ride.

 

did you change the fuel filter?

 

it doesnt have a fuel filter, only an oil filter

 

it has to have a fuel filter, a damn lawn mower has a fuel filter

 

usually the only fuel filter is the screen in the fuel petcock
other than that most smaller/simpler bikes dont have one at all unless it has been added

 

Did you check the vacuum lines (if it has any)? a cracked, or removed vacuum line could cause that. The engine not advancing through the rpms under load would cause that also.

 

Good ideas to throw around. All petcocks have a screen, I still placed an in line filter. Yup cracked rubbers is another thing to consider with your ride.

 

No body wants a broken rubber

 

Drain the float bowl into a cup and see what you find?

 

Good idea. You might want to see if the fuel line is clogged also, without a filter all kinds of crap can end-up deposited in there.