valve clearance check.
 

We have only 5-6 hours on a klx 125l and it backfires when you de-cellerate in first or second, rarely in third. It is also hard to get it to idle when cold. Someone suggested to check the valve clearance but I am hesatent to do this myself. I have seen postings about other bikes and valves just not this one. If anyone has pics of their valve work please post them. I would like to do it myself since it is a new bike and I have more than one. Is it difficult? Any special tools I may need? Thanks in advance.

Ryan

RE: valve clearance check.
 

So I ordered the shop manual for the KLX125 a/b but it is back ordered. Guess bike will sit until I get it.

RE: valve clearance check.
 

I would take it to the dealer. You should not have any valve clearance change in 5-6 hours of operation.

RE: valve clearance check.
 

I can't give you much help on that bike on the valves.

But, have you checked the air fuel screws to make sure they are the right turns out? In?

RE: valve clearance check.
 

Valves were ok. It was the fuel screw. 1/4 from the factory. I'm at 2 now. Runs fine now and MUCH easier to start.
Thanks.

Ryan.

p.s. Much easier to work on than the 250s. Lots of clearance. That part was nice.

RE: valve clearance check.
 

Another good call by BR, endless knowlege :D

Glad you got it figured out Ginsu, What altitude are you at?

RE: valve clearance check.
 

2000 ft. I read somewhere that the fuel screw should be at 2.5 turns and an adjustable needle should be added. I chose 2 turns and it seems to do the trick. I didn't modify the exhaust as suggested by some other forum I read (Thumper Talk??). I will add an aftermarket exhaust this winter.

RE: valve clearance check.
 

All right man, here's your $20 bucks....lol lol

Glad you got it fixed....It's always easier to start at the easy things. :D