stalling, hard starting 03 450


3 replies to this topic
  • yzjoel

Posted August 07, 2011 - 08:34 PM

#1

This bike has a completely stock motor and a magura hydro clutch. Stalls with clutch in and back brake on. Also stalls when giving throttle at low speeds. What can I do?

  • Octanee

Posted August 07, 2011 - 08:42 PM

#2

i will probably say its a compression/valve issue, also being a 03 450, i would also ask if the valves have ever been done/piston touched at all, if not, im going to say, new piston, rings, valves probably or valves being shimmed, stuff like that is going to be needing to be done

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  • grayracer513

Posted August 08, 2011 - 05:56 AM

#3

I think I'd try adjusting the idle speed and mixture before I went into an overhaul :eek:

http://www.thumperfa.../jetting.htm#PJ

  • yzjoel

Posted August 08, 2011 - 08:35 AM

#4

I appreciate the info. I changed the pilot up to a 45 before the race. It didn't seem to help. I will play with idle speed and recheck the valves. I checked them in June and they were in spec.





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