Maintenance & Technical > KX500 Original

Top of powerband.

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Uzi9mm:
Thanks for the replies,

Cam, I will check out the float level deal.  Hillclimb, I haven't changed the gearing at all still running 14/47.  I ride some easy trails and some basic tracks.  I have a lot to learn about dirtbikes.  Haven't inspected the reeds yet.  I will look into the timing too.  No pinging or knocking.  Haven't had the top end off either. 

KXcam22:
Definitely sounds like something is not quite right.  As a suggestion I would:

1. verify compression with a tester.  No good trying to jet a worn out engine.

2. Inspect your reeds.  You will need a new gasket.

3. Verify the plug.  BR8ES,  BPR8ES, BR8EIX  etc.

4. Set the float height.

5.  Make sure the airfilter is in good shape and not over oiled.

Let us know how you make out. Cam.

apple:
I`m with Cam on the Gnarly pipe. I had the same problem, switched to a desert pipe and the top end gain was HUGE. I went 1 notch richer on the main jet, 1 richer on the needle clip. I do not need more power now. :-o

Uzi9mm:
Verified compression @ 160psi.  New Uni air cleaner lightly oiled.  Did not check reeds yet and didn't change float height.  Replaced the old BR8ES with a BR8EIX.  Takes a couple more kiks to start now but cleared up the problem.  The old plug was gapped at 2x what is recommended in the manual.  Thanks to all for the ideas :-).  Where do you guys order most of your parts?  Like gaskets etc..  I didn't realize that FMF made 2 Gnarly pipes.  Mine is a Gnarly Desert pipe.  What silencer do u recommend, mine is stock and probly needs to be repacked.  Never repacked a silencer, which kit should i get?  Still going through the bike and riding it as much as I can.  I will check the reeds and re-check the floats soon.  I want to ride a couple more times first.

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