Maintenance & Technical > KX500 Original
Siezed?
3Razors:
Mottorad, I'm not saying its an absolution for everyone. There are many variables involved with how many hours were on the motor prior, oil mixture, ect before the damage took place. Every situation is different and I take that into effect whether we decide to go that route or not. Same thing as I have seem people insist on a new lower end when the topend grenades and come to find out when we pull the thing apart all the lower end components are like new.
And if your going to split the cases you better be mechanically sound or take it to someone who knows what they are doing as I have seen far too many newbies venture there and end up making things worse with they rebuild it.
cbxracer30:
My buddies polaris snowmobile implodded twice like that before he reliezed he had torn intake boots on the bottom side and it was sucking air.I would say if you have the money rebuild the bottom end - thats the safe play, and if you were from PA I would say bring it over I can help, in less than a hour we could that out and a few beers out.CBX Oh yea have to do it while the wifes at work she seeing me rebuild motors on the island in the kitchen [zero degrees outside not gonna heat the garage just for that] :-D
don46:
look very carefully at your cases, I've seen them blown not as bad as yours and crack the cases, a peice of piston gets in between the crank and cases and causes it to crack. as for the debate, should you split it or not, keep in mind this old saying "you can pay me now or later" and you will pay maybe even destroying your new piston.
Also, if the clutch was slipping that bad that it wouldn't go, that could have been the partial cause of your failure, a slipping clutch generates a tremendous amount of heat, coupled with a leaking water pump seal (=no coolant). yah upon reflection you more than likely caused this destruction yourself, why in the world would you not fix a failed water pump seal? water in the bearings is never a good deal.
At any rate I hope you get by with a minimal amount of failed parts.
Good luck
doctord:
I suggest you pop the cases and take a look.
I bought a KDX220 basket case that had snapped the piston skirt. With all the pieces out, the crank turned free. I was tempted to just replace the piston but resisted that urge. When I took it apart, there was a whole in the case below the crank. The crank bearings still felt like new, but I replaced them anyway after I repaired the case. Just sayin'.
littlewing78:
You guys all know way more than I do about this. I only got this bike 6 months ago and it is my first one. The guy I bought it from had been running it without an air filter at all. I am going to open up the case because I know there are chunks of piston inside there. I just don't have the tool to remove the magneto.
I do think most of the damage was caused by me. Just glad I got the bike as cheap as I did.
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