Maintenance & Technical > KX500 Original

Black gunk

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cattamer:
Thanks CBX,any suggestions on what is best to clean out pipe?.I have an aftermarket silencer on way. :-D

cbxracer30:
Yea, Not sure if you can get it in your area  Berkybile 2+2 instant gum cutter. Spray it down in the pipe cover both ends and swoosh it around. This will get most of the wet oil out. If you can't get Gum Cutter then just cheap oven cleaner, spray itin and let it work for about 15-20 min. repet if there is alot of build up. try not to get it on the outside of the pipe. Then for the head part of the pipe you can get round wire brushes that attach to a drill motor, try and find one the same diameter as your pipe and run it in and out with the drill till the build up is gone

stock500:
Make sure the copper o-ring that seals the pipe to the cylinder is there.  I was having the same problem, and I didn't realize it was missing because the two o-rings on the heap pipe were there, and I didn't know there was another gasket.  I looked at the OEM chart and saw it, so when I put my bike back together it should be better. 

hughes:
Before you make any jetting changes you'll need to check float height. low float height will allow to much fuel inside the carb bowl and the bike will run pig rich at low/mid range speeds. I have cleaned up the black splooge on a few bikes just by setting the float height. Not that much of big deal a really new bike but a 92 model it really needs to be checked. Also leaking crank main seals can make you think you have jetting issues. My 87 500 ran 32:1 premix, correct float height,a few jetting changes and never displayed the black splooge.

cattamer:
Thanks guys,The copper O-ring is there 500,thanks.Hughes how do you check and set the float height?I've had several 2-strokes and I've never known this,but I've never had this problem either.Are there any other signs to seals being bad?

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