Maintenance & Technical > KX500 Original

Leaking Oil Seal - Behind Sprocket

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hoopty:
Wrong. The collar fits over the countershaft (which has the teeth for the sprocket) and the seal fits around the collar. It's that way because the teeth on the countershaft would eat the seal. When oil leaks from this area it is coming from the back of the collar - where the o-ring is. When I get my digital camera working I will post pics.

hughes:
You are right. But my 87 might be a little diff. but it has been a year scents I had to replace mine. Let's just replace the 0-ring and oil seal. Anyway if oil is leaking out then it must be leaking pass the o-ring and then the oil seal.

JAD777:
To close this off, I pulled out the collar and found no o-ring at all.  That would explain the leak and why the sprocket was loose.  Replaced the o-ring and it looks good - Hope to run it this weekend.  My oil seal is also on order, so I will replace that once it's in.

Thanks all for your help.

TheCultivator:
Right I'm confused. Ordered my parts and got the little seal that goes on the shaft, and also the big plastic seal that goes around the metal collar. 1st I started ripping into the old big plastic seal around the collar. It appears it was stuck to the case with some sort of glue. I had to peal it off with a chisel, craft knife and screw driver. But here's the confusing thing. The new plastic seal that goes round the collar is about 3/4 of a cm thick. For those not into metric, about as wide as your front tooth....it's huge. When I put it round the collar it protrudes out to such a degree you have no chance of getting the sproket on. Do I have the wrong part??? or do I need to force the sproket on compressing the big seal...this would create huge friction and probably knock about 20 horsepower off the beast. Any ideas??

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