Carb. is clean but will not idle and bogs down when you rev it up. Baja Motorsports 2006 125cc dirt bike

Murtaza Akberali Versi

• 767 Answers
• Posted on Feb 13, 2009

SOURCE: 2003 WR250 F - eng. won't idle down and carb starts to overflow

Hi Jwelden,
Have you checked the float level in the float chamber?
I guess you may have to reset the float pin adjustment, its allowing more gas to pass through thn required and thus the overflow!
Not bad too, when you are working on the float assembly take the opportunity to blow out the fuel line from petcock to the carburator via the seat for the float pin,any foreign particals there would stop the float pin to seal up and thus overflow.
Fit in an inline fuel filter , this will help keep out the dirt or whatever.
Hope this helps.

Knight (Yamaha Seca XJ750A 1981)

SOURCE: 2005 yamaha yzf 250-unstable idle

I had the same problem, Turns out that my shims were finished, replace the chims and check clearences.

SOURCE: wr 200 power problems

Unhook exhaust pipe,check port for blockage. if it is clear try to rev up with pipe off.If exhust is clear you will need to check high side of carb. good luck

SOURCE: screw setting for a 49cc baja dirt bike its a

GENTLY turn the idle screw and the air screw all the way in untill the LIGHTLY seat. Now turn each screw out one and one-half
( 1 and 1/2 ) full turns. This is the stock setting.

Please rater this answer. Thanks snow8006!

SOURCE: bike bogs for second then revs when throttling

Pull the slide out of the carb then remove the jet needle and move the clip one notch lower on the needle.