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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Bike just stopped running mid day
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[QUOTE="cheapo, post: 1478192, member: 40195"] I’m baffled by this. So as I’m prepping my 2000 KDX to run a hare scramble this weekend, I started the bike and it ran on the 3rd kick after sitting over the winter. I let it warm up, ran it around the yard, then drained the oil. I filled the oil back up and it hasn’t run since. Here is what I then did and what I observed: [LIST] [*]Put new spark plug in; confirmed it was getting spark. [*]Drained the carb bowl, cleaned the bowl, removed and blew out the main jet and pilot jet; then generally cleaned the carb. [*]Cleaned the air filter and air box (I occasionally get a mouse nest at the bottom of the air box over winter) – confirmed it had clean path to the carb. [*]Drained the gas and replaced with fresh Premium gas and premix. [*]Confirmed the gas ran through the petcock and into the carb. [*]As I kicked and kicked with no start, I noticed unspent gas/oil leaking from the exhaust pipe head (where it connects to the cylinder) – I probably need a new gasket/washer, but I have seen that before and bike still ran fine. So I took off exhaust pipe, cleaned it and put back. [*]I noticed some carbon build up at the exhaust port and a little bit of black on the piston just under the rings. [/LIST] The most baffling thing is, the bike was running perfect until I changed oil. Now it doesn’t even sound like it wants to turn over; like it’s not getting any spark, gas and/or air. I did the top end many years ago and the bike has always started in the first 5-10 kicks all these years. It’s never just stopped running after running earlier; it’s been pretty bulletproof all these years. I’m trying to get it running before Sunday; any insight is greatly appreciated. Thanks in advance. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Bike just stopped running mid day
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