Maintenance & Technical > KX500 Original

Exhaust Valve - Well I think

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hughes:
http://www.kxriders.com/forums/index.php?page=11

Here's the chart just in case you didn't know where to find it.

c-152:
Thanks for the great info guys.  It sounds as if you guy are saying that the exhaust valve wouldnt cause this kind of problem even if it were completly broke.  To give a little more info about the problem - After about 40 minutes into the race on a tight trail with no chance to open it up, I had to constantly clutch and rev or risk bogging and stalling the bike.  It would fire back up okay but then bog again.  I know some of the time it would stall due to operater stupidity but it was getting tothe point that I had to be on the pipe all the time or it would just cut out.  Towards the end before I pulled out, it would cutout as I was getting on the gas.

I will check out the jetting mixture then go from there.  Thanks guys

hughes:
Mine does that same thing during the summer heat. I try to stick with same jetting for fall,spring,summer and winter. My bike runs strong until the weather gets around the 85 plus degrees and the low speed suffers. Strong off idle and midrange and top but low speed I'm always clutching it to keep it running.

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