Hi, just got my new/old KLX250 back home and need some advice please . I new the bike had this problem when I bought it. On tick over it has to be blipped with the throttle to stop it stalling. If you hold the throttle set at just above tick over the revs rise, fall and rise and then will cut out (in no particular order).
Does anyone think it is a whole in the diaphragm
It starts fine and rides great but not when ticking over.
Thanks in advance for any help !

 

All thats needed to check is to remove the fuel tank. Pop off the lid on the carb and look. You don't need to remove the carb to work on the top part.

 

I'll have a look later tonight, Thanks Je

 

I am confused. what is the tick you are talking about?

 

I think he means kick or turn over referring to the initial start or fire. Just my guess.

 

While you are checking the diaphram, also check the pilot jet in the bottom of the carb. The hole in it is very small and it is easy to get some crud in it and restrict fuel flow. The pilot jet and pilot needle control fuel flow at idle and very low rpm.

Ride on
Brewster

 

I have to ask... you do have the choke pulled on when starting it cold, don't you?

 

Thank everyone,
Should have put tickover (one word). Choke is not on. No holes in diaphragm. The spring has a plastic four legged claw attached to the end and looks like it just sits on top of the needle/slide (it is not clipped onto it, just lifts off, attached to spring)is that o.k.
To check the pilot jet can i leave the carb on the bike, take fuel bowl off and get to it that way or should I take the carb off to do it ?

 

I dont know about the rest, but mine loves to be choked. Even in summer if I stop for over 15 minutes I use it. I could do like you and blip the throttle but there is fuel starvation happening for a bit( uneven rpms). Everything is still stock and she's been like this since day 1.

 

Mine insists on being choked at first start-up as well. Even after it's idling fine it still takes a bit before I have good throttle response.