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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Any info on a KDX200-G4?
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[QUOTE="jaguar, post: 770651, member: 19340"] KDX's are famous for having broken powervalves. I got tired of replacing them twice a year so I just used epoxy (the kind with metal in it is best) to glue two broken ones in place in the open position. Its best to drill a tiny hole into the bottom of them because if the glue causes an air pocket under them when installing then you'll have to push like HHEELL to get them in. See my page by clicking on my link below. To give back some low end power that you'll lose you can make your own half thick base gasket. That lowers the ports and increases compression. Also take off the ignition cover and see if there was moisture there. Sometimes that causes it to run ratty. Check that your spark plug is clean and properly gapped. Usually the silencers don't cause a problem. Do poke something into the end of your exhaust pipe to see if there are any obstructions. I'm near 1000 ft and my bike likes a main jet close to 128. But since I don't like waiting for ever for a new jet to arrive, I just drilled a hole in the side of the jet and put in a tiny screw that when screwed in enough will protrude into the gas channel. That way you can just adjust it without having to replace the jet. After you see that the 148 you ordered is too big then you can modify it that way. It has to be short enough that the head is not too far out to the side of the jet because then the bowl drain would hit it which would prevent assembly. Also water in gas will cause it to run ratty. Take the tank off, take off the cap, swish the gas around and then quickly dump it out. If corrosion comes out also then put more gas in and repeat the process till it comes out clean. I don't remember seeing an o-ring on the air screw. Also check your piston to cylinder clearance and piston ring end gap. Either of those being too much will lower the compression which lowers power. I got tired of the gear oil dumping onto the filter so I connected a fatter tube onto the existing one where it ended which channeled the oil safely down to the bottom of the air box and not onto the filter. happy mechanicing! [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Any info on a KDX200-G4?
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