2000 yzf426 problems


15 replies to this topic
  • nagualchrist

Posted September 08, 2005 - 09:29 AM

#1

2000 426 with 450 cam, blue wire mod. bike starts and runs with the choke on, but dies shortly after the choke is let off. any suggestions would be great.

thanks

  • OreoMan

Posted September 08, 2005 - 09:57 AM

#2

Have you checked the plug for carbonization?

  • grayracer513

Posted September 08, 2005 - 09:59 AM

#3

Warm the bike up and adjust the idle speed and idle fuel mix. If you still have trouble, or if you can't get the idle adjusted right, check your valve clearances.

  • nagualchrist

Posted September 08, 2005 - 02:28 PM

#4

Bike ran great, than sat for awhile, took carb off to clean, and then put back on. Prior to that valves were in spec. Plug is showing a little carbon fouling. Bike seems to be hit or miss, ran great right after i put it back together and then started acting up again.

  • OreoMan

Posted September 08, 2005 - 02:32 PM

#5

Bike ran great, than sat for awhile, took carb off to clean, and then put back on. Prior to that valves were in spec. Plug is showing a little carbon fouling. Bike seems to be hit or miss, ran great right after i put it back together and then started acting up again.



I think it's your plug. Did you clean the plug? If so, yank it out and check it again. If it's fouled again, you might be running too lean. If you didn't clean the plug, try a new plug and see if that corrects the problem.

  • nagualchrist

Posted September 08, 2005 - 09:29 AM

#6

2000 426 with 450 cam, blue wire mod. bike starts and runs with the choke on, but dies shortly after the choke is let off. any suggestions would be great.

thanks

  • OreoMan

Posted September 08, 2005 - 09:57 AM

#7

Have you checked the plug for carbonization?

  • grayracer513

Posted September 08, 2005 - 09:59 AM

#8

Warm the bike up and adjust the idle speed and idle fuel mix. If you still have trouble, or if you can't get the idle adjusted right, check your valve clearances.

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  • nagualchrist

Posted September 08, 2005 - 02:28 PM

#9

Bike ran great, than sat for awhile, took carb off to clean, and then put back on. Prior to that valves were in spec. Plug is showing a little carbon fouling. Bike seems to be hit or miss, ran great right after i put it back together and then started acting up again.

  • OreoMan

Posted September 08, 2005 - 02:32 PM

#10

Bike ran great, than sat for awhile, took carb off to clean, and then put back on. Prior to that valves were in spec. Plug is showing a little carbon fouling. Bike seems to be hit or miss, ran great right after i put it back together and then started acting up again.



I think it's your plug. Did you clean the plug? If so, yank it out and check it again. If it's fouled again, you might be running too lean. If you didn't clean the plug, try a new plug and see if that corrects the problem.

  • nagualchrist

Posted September 08, 2005 - 07:26 PM

#11

New plug in there. Although the old plug did have some fouling.

  • YZRob

Posted September 09, 2005 - 04:54 AM

#12

Check to see if your main jet is clogged, If it runs fine with the choke on and not off it sounds like you are not getting enough fuel

  • cowboyona426

Posted September 09, 2005 - 11:08 AM

#13

Did you have the carb slide out when you cleaned the carb? If you did, double check and be sure you put the plate back in right. It looks right when it's wrong and will do exactly what you are saying to the bike.

  • nagualchrist

Posted September 09, 2005 - 03:42 PM

#14

I didn't take it out but I'm gonna pull the carb out again and reclean everything just i case.

  • LJ

Posted September 09, 2005 - 04:08 PM

#15

Make sure the pilot jet is clean. Hold it up to a light and make sure that there is NOTHING in it. If it is slightly clogged, your bike won't idle. The pilot circuit is the main circuit at idle up to about 1/8 throttle, so if affects how your bike idles. Your bike will also pop more on decel if the pilot jet is clogged.

  • nagualchrist

Posted September 10, 2005 - 02:18 PM

#16

Thanks all, pilot jet was clogged 100%, bike now runs great.





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