Engine popping


4 replies to this topic
  • socalduner

Posted November 08, 2004 - 12:14 PM

#1

My 426 has started popping and if you crack the throttle off idle it rev's very high, and wont stop until I hit the kill switch. The filter is clean and the jetting unchanged. Any Ideas? :cry:

  • Riel250f

Posted November 08, 2004 - 12:48 PM

#2

Check the carb boots, could have an air leak.
My boot ripped (on the cylinder side) when I landed off a jump too hard.

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  • yzf450jack

Posted November 08, 2004 - 08:21 PM

#3

You might have an exhaust leak

  • socalduner

Posted November 09, 2004 - 06:48 PM

#4

I think it was the carb boot. I was reading the instructions for the power now, and it said if the boot wasn't in the groove right the idle would be high and erratic.Thanks for your help. :cry:

  • John_Lorenz

Posted November 10, 2004 - 06:50 AM

#5

My 426 has started popping and if you crack the throttle off idle it rev's very high, and wont stop until I hit the kill switch. The filter is clean and the jetting unchanged. Any Ideas? :cry:


When was the last time you took the carb apart and cleaned it thoroughly?

If the idle is hanging as you said above, then a few things can be an issue
1: Cable can be frayed, causing the hanging
2: Dirty Carb/Clogged Pilot/Fuel Airway
3: Air leak in rubber manifold (Between Carb and Head)
4: Throttle tube is damaged and hanging

I would say its time to do a very close once over on your whole assembly Throttle tube to Carb :cry:





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