2000 yz426f problems

6 replies to this topic
  • deerman2701

Posted May 23, 2011 - 06:50 PM


So my buddy has had his 426 since last year and recently it is havin some problems..

ive checked the timing, cleand the carb, jetted, checked valve clearences, fluid levels.

okay so just recenty his 426 has been getting real hot real fast, maybe its normal but the header and engine gets too hot to touch within like 3 min.

also the idle seems to be irratic, ie it idles fine one min then when he slows down it will be too low and stall his bike...

and lastly the bike just randomly cuts out and dies... then its hard to start for a little bit. and just doesnt run right?

any ideas?

  • DeeCee

Posted May 24, 2011 - 01:01 AM


Check the valve timing, it may have jumped.

  • Yamaryder29

Posted May 24, 2011 - 04:17 AM


where in Pa are you?

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  • deerman2701

Posted May 24, 2011 - 07:43 AM


right outside pittsburgh, 15108.

  • Yamaryder29

Posted May 24, 2011 - 08:30 AM


I'm up in Erie. I have a 2000 yz426. I would redo the timing once more. Does it have stock cams?

  • deerman2701

Posted May 24, 2011 - 08:42 AM


the timing is perfect though, and no it has hotcams in it.

  • houndog426

Posted May 24, 2011 - 05:38 PM


Maybe TPS sensor?

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