Maintenance & Technical > KX500 Original
2000 KX500 - New to me.
Friar-Tuck:
Rats.. sorry to hear about that Camo, it sounded like the bike was running great. I figured if you ran the bike hard at sea level any elevation change would have been up, and worse case senario was the bike would have been too rich.
I don't want to make any accusations, but if you don't think your brother could ride the bike any harder than you did...
Is it possible the fuel can of pre-mix got swapped out for the straight fuel?
If I understood you, your last ride out was at the beach, so I'm figuring you were able to "See what she Had".
The sand / dunes puts a about as hard a load on a bike as you can get.
If the bike held together under those conditions, with you piloting, I don't see how running the woods was any harder on the engine. Now I don't Race and I'm certainly no engine guru, but I know it wouldn't take long to muller up the top end with little to no oil, the bike was jetted for sea level and it wasn't much cooler at 2500' than it was at sea level a few weeks ago. (well not enough to cause the bike to be jetted too lean at 2500')
Sorry Mate, I was hoping the plug just worked its way loose! :|
Tuck\o/
Camo:
It ran strong at the beach. Wheelies in every gear. Kick me off the bike when starting if I didn't follow through properly. Start and idle with it crisply pounding. No odd noises other than the normal vibration. There is no way my nephew rode it in the woods harder than I did in the sand. He ran the premix I mixed for him before I left. Maybe the fuel was bad and it detonated? Had that before in my sleds. The fuel was 3 weeks old 93 premium mixed with 108 race 50:1 with synthetic Amsoil oil. Hmmmm. I'll have to go home and investigate I guess. I wonder if the crank seal went. Plug looks decent from what my Dad said.
Polar-Bus:
--- Quote from: Camo on August 22, 2011, 10:50:49 AM ---It ran strong at the beach. Wheelies in every gear. Kick me off the bike when starting if I didn't follow through properly. Start and idle with it crisply pounding. No odd noises other than the normal vibration. There is no way my nephew rode it in the woods harder than I did in the sand. He ran the premix I mixed for him before I left. Maybe the fuel was bad and it detonated? Had that before in my sleds. The fuel was 3 weeks old 93 premium mixed with 108 race 50:1 with synthetic Amsoil oil. Hmmmm. I'll have to go home and investigate I guess. I wonder if the crank seal went. Plug looks decent from what my Dad said.
--- End quote ---
post pics of the cylinder and the piston, we should be able to give you a good idea of what happened. pistons always give clues about the failure.
Camo:
I will. I won't be home for a week. I'll have it apart next Wednesday. I heard... the motor has to come out to remove the cylinder. Any rumor to this or can I get it apart in frame?
Polar-Bus:
--- Quote from: Camo on August 24, 2011, 12:58:33 AM ---I will. I won't be home for a week. I'll have it apart next Wednesday. I heard... the motor has to come out to remove the cylinder. Any rumor to this or can I get it apart in frame?
--- End quote ---
False. Remove the head first then slide the cyl off no problems. You can pull the cyl and head together but it is a VERY tight squeeze.
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