Maintenance & Technical > KX500 Original

Couple o questions jetting & top end

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KXcam22:
My rule of thumb is that if u can bump start your KX500 then it is definitely time for a new top end. Cam

Platypus:

--- Quote from: KXcam22 on April 26, 2007, 04:02:43 PM ---My rule of thumb is that if u can bump start your KX500 then it is definitely time for a new top end. Cam

--- End quote ---

Cam,  I was able to bump start my bike twice on some semi-technical hills in 2nd gear with a good hard seat bounce.  The compression seems to be fine but I have not done a compression test.  Two other people have tried to start it and could not but I have no problems.  Does hot or cold motor play into your rule of thumb?

KXcam22:
It's just a rule of thumb - don't want to mislead anyone.  I have never been able to bump start mine, even on pavement it just skids (I am 200lbs).  When I could, I could already notice it being easier to kick. On dissassembly the piston was obviously very worn out.  I never did a compression test so this is all very unscientific. Cam.

c-152:
Cam, I can bump start mine and always have been able to even after a rebuild (though the conditions have to be perfect and I have to get a good bounce on it).  I have a steahly flywheel though. Think that makes a difference?

Good:
I've always been able to also, in second or third rolling downhill with a good bounce on the seat.  That's how I start her often just to expedite things, I guess...

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