Maintenance & Technical > KX500 Original

Starting Problem?

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Woody223:
My bike a 1990 has always been a 1 to 2 kick starter. I rebuilt the motor last summer and it has been running like a dream since until I fixed something that wasn't broken.

There has always been an exhaust leak around the pipe where it some out of the head and I was waiting until I fixed the dents in the pipe to fix it. Well I fixed the pipe put new o-rings on the pipe and sealed it with permatex.  While I had it apart I figured that I would rejet the bike to the warmer weather that we are having where I live and did. And now it will not start. It is flooded and my leg started to hurt not to mention the huge knot on my shin, so I figured I'd ask the pros.

Below are what my jetting and other specs are.
Needle - N82M in the 2nd notch, same as before
Main - 162 went down from 168
Pilot - 55, same as before
Air Screw - 2 turns out, tried 1 1/2 to 2 1/2, 2 turns was starting point
Fresh 92 octane with maxima mixed 40 to 1
Plug B8EG - do not know gap off hand, slightly old but it was running fine before. Don't have spare to replace.
Float set at recommended heigth
Timing checked and OK
Boyesen Reed Cage
Pro Circuit Pipe - Unknow came with bike.

I just do not know what I did, the only major change was really sealing the exhaust pipe at the head.

Any help would be greatly appreciated.

Woody223

gowen:
Start by replacing the plug. You should be able to get one through any dealer for about $3 or maybe just get a b8es from any parts story (napa, advanced auto, pep boys, ect.) for about a buck and a half. Let us know, try that first, or just pull off the plug cap and see if it sparks against the head, but becareful, it won't feel nice to have that spark grab ya.

gowen:
Maybe your float is sticking close? Is gas in the carb? Are you sure your coil and cdi wires are hooked? Do they have corrosion?

Big one! Is the GAS fresh? Start by checking your connections, compression, and check for spark. Once you are done that, replace the fuel (FRESH) and a new plug. Try.

There are only a few things needed to run a bike, that's compression, fuel, and spark.

Woody223:
I already went through the electrical system and checked for spark and corrosion. Nice fairly fat blue spark. I pulled the carb off and checked float heigth and to make sure it was free, and it is new gas that I purchased today.

Tomorrow I am going to pull the carb apart and put my old main jet a 168 and give it a try and if that does not work, I will try a new plug. The only reason I have not done that yet is that I live about 60 miles from the nearest town and I was not going to town tonight I'll get a knew plug sometime this week and try it.

Thanks, Woody223

Folke:
Lay down the bike before you kick, you will fill the carb.with gas, maybe its emty before (the temp.out will maybe empting your carb. when you dont use your bike.

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