426 starts hard


2 replies to this topic
  • rufusz

Posted May 06, 2008 - 10:18 PM

#1

Hi

I've got a 2002 426 with HotCams exhaust cam with AD. Problem is starting the bike when cold. Procedure : Pull choke, give 2 (max3) full throttle, kick. Bike starts but stalls after 1-2 seconds, procedure again, starts, stalls after couple seconds. Basically I have to "start it" 3 or 4 times before it will idle normally.
This happens only when I don't ride for a couple of days, starting when hot or after resting is no problem, starts on first kick.
Any ideas?

Thx

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  • 642MX

Posted May 07, 2008 - 05:21 AM

#2

Try starting it without the choke on.

  • BASSic

Posted May 07, 2008 - 06:25 AM

#3

The whole point of twisting the throttle is to get the accelerator pump to squirt some fuel into the engine. When you twist the throttle prior to starting a cold engine, try holding it for a second or two to ensure the AP has time to deliver the fuel.

A few times I have experienced the symptoms you described. After taking the throttle cable cover off my carb, I realized the AP linkage doesn't move as freely as it should. I'm due for a thorough carb cleaning anyway, and this is something I'll be focusing on.





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