Maintenance & Technical > KX500 Original
KX500 AF Running like a 200
alward25:
Might be the air filter, there was another guy on here that went to replace his air filter and eventually got to the bottom of his problem. He started a whole thread about it. The other ideas are good too. plug,reeds,crankcase seal, KIPS. i had a mouse build a nest in my pipe once. It was strangely quiet and ran like butt.
let us know what you find out!
RKPerformance:
Well I took the rod cover off and the pipe off to check operation of the valves. Rotating the arm all 3 valves appear to move and close as they are supposed to. I noticed a little coolant in that rubber elbow that houses the rod lever. No idea why there would be a little coolant in there?? Piston looked really good as did cylinder. One thing troubling to me was the pipe. It is a FMF Fatty pipe and whoever did this conversion really rammed this pipe in there. The neck bend coming off the cylinder is pinched very very tight. I dont know hoe it can breathe. Also near the end of the main expansion chamber the pipe is smashed waay in for clearance issues. Im starting to think this pipe is a major restricting point on the bike. The frame is a 2000 kx250AF. DOnt know who did the conversion either so i dont know what kind of pipe i can use to try and see if another pipe is better>>>?
USMC 500:
--- Quote from: alward25 on April 30, 2013, 12:21:45 PM ---Might be the air filter, there was another guy on here that went to replace his air filter and eventually got to the bottom of his problem. He started a whole thread about it. The other ideas are good too. plug,reeds,crankcase seal, KIPS. i had a mouse build a nest in my pipe once. It was strangely quiet and ran like butt.
let us know what you find out!
--- End quote ---
Gee Alex, who could that guy be that you are speaking of...... :-D
RKPerformance:
Here is a pic of the neck
RKPerformance:
Here is the pipe near the end. I know it is hard to tell how far in the dent goes but it is huge and goes for a long ways, same with the neck bend it is amazing air can flow thru it!
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