2007 KX450f Won't Start
Posted 16 May 2012 - 05:27 AM
I was riding my bike at the track a few weeks ago when I noticed my clutch started to slip a little bit out of some of the turns while riding. I was having such a good time riding that I continued for a few more laps. Next thing I know I come out of a turn and my bike boggs, dies, and would not start. I got it home and got it to fire up but only for a few seconds and after that the bike will not start ever since.
I pulled the plug and positioned it next to my head bolt and kicked it over and it would spark. I tested the compression with the engine cold and got about 60 psi. I cleaned the jet and bowl out in my carb, seemed to be clean. I have the intake off and when I twist the throttle I can see that there is fuel squirting down the intake towards the valves. I shimmed my valves about 12 hours ago and just rechecked them again and noticed that they are slightly loose out of spec but I still think it would fire.
I'am I missing something? You would think that with the fuel, spark, and compression that it would at least fire up for a second, more than a little backfire. I was thinking that the heat build up from my clutch slipping could of damaged my stator, rotor, or coil.
This is a last ditch effort before I take it to the dealer.
Posted 16 May 2012 - 06:06 AM
Posted 16 May 2012 - 06:26 AM
How do I disconnect the decompression assembly?
Its crazy that the piston would just spontaneously crack like that.
Posted 16 May 2012 - 07:45 AM
Posted 16 May 2012 - 07:47 AM
Remove the valve cover and look at the end of the exhaust cam. You will see a spring that adds resistance to the weights. Remove the spring and wire the weights out. That is the quickest way I can think of.
I'm not saying this is definitely your problem but a likely one. You may need to go through the diagnostic tree, fuel, spark, timing, and, compression?
Does it feel normal when you kick it or is it a little easier?
Posted 16 May 2012 - 07:59 AM
Posted 17 May 2012 - 07:27 AM