Does anyone know if a 2000 rear shock and spring will fit straight into a 2006 model? I have blown out the seals and was looking if its cheaper to get a new shock or re-gas.

 

A shock from a 2000 what? From your profile info I can't tell where you're from to see what your options might be...Australia, U.S., or where. Here in the U.S. we didn't have a 2000 KLX250. Are you referring to a KLX300, or? Honest...not being difficult...just clarifying.

 

Sorry mate, a 2000 klx250. i'm in Australia.

 

From looking at my Kawasaki shop manual, it looks like everything from 1999 through 2007 uses the same shock. It may be that even prior years would fit, but I didn't study that manual since your question was about a 2000. I'd say you're good to go.

 

I'd think you could buy the necessary seals and have the shock rebuilt by a decent shop that does MX bike business. Fact is if you're careful you can do the work. I did one on my 83 CR250R some years back. It's just making sure you know how it is disassembled and rebuilt, filling it properly too.

 

The older Showa and KYB rear shocks are actually easier to rebuild than the fork IMO. There's no magic in there, and bleeding the air out of the oil when filling it is very easy. Then many think that charging it with nitrogen at a local motorcycle shop is something special and expensive...not. In fact since I'm not racing my KLX, I don't even use nitrogen to charge the piggyback...just air from a high pressure mountainbike shock pump. Works like a charm.

 

A decent shop won't hit you that hard for a nitrogen charge though.

I agree though, air if run through a filter to filter out moisture wouldn't be bad for 90% of us. We can't work the shock hard enough to cause any issue that might call for nitrogen. Once you realize it is going into a rubber bladder and can't affect the internals there shouldn't be much concern.