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I have a 99 mxz 600, and yesterday I noticed there is grease on the under side of the belt guard on just the edge by the crank and also some managed to get onto the hood. I checked the backside of the clutch sheeve and it actually looked fairly dry. There was greese around the crankshaft end, and I'm sure that is where all of the grease came from. I'm not sure what isoflex looks like, but I have a feeling this is what it is.

The sled still runs ok, I checked the plugs and they are still golden brown. I ran it and sprayed carb cleaner around the seal and the rpms didn't raise. I have noticed that my rpms don't like to climb like they used to, and I didn't know if this could be the reason. I have new reeds in it this season, the carbs are spotless, and the gas is fine. The sled has about 3800 miles.

If it is the seal, is there anything else I should replace in the bottom end? If I do have to tear it down, I'm already planning on a new top end since it will already be torn apart. Let me know what you think, I want to get it fixed if this is what the problem is before I burn the motor down.

Thanks
 

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Is the rave valve on pto side dripping maybe that is whats going on. I rode on a Lg. Lake this past wkend and had a long fast ride, opened the hood when I got home to find oil on my clutch guard it came from the weep hole under the rave valve.
 

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I had the same problem on my 03 600 seal was puking grease out 1400 miles. I pulled the motor, split the cases and repacked pto bearing and replaced seal. It was 70 dollars for parts i never pulled topend down,got a hundred miles so far and no leak so i`m hoping it holds. Trying not to beat on as much as i did before but its hard to doo. Randy
 

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meanfarmer said:
snownuts said:
Has anyone tried putting a new seal in without splitting hte cases. mine is leaking a little bit and was wondering if it has been tried with any success.
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There is a port on the pto side, carb side A nipple to to add isoflex grease
If so How much grease??
 

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Discussion Starter · #10 ·
I'm curious of why you would have to rebalance the crank. I had thought about replacing the outer pto bearing as well just for extra insurance. Will the 04 seal work in my motor?
 

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Are you sure its not coming from the jackshaft bearing where speedo cable plugs in? There is a grease nipple there. Has your speedo been acting up? Usually this is a sign of bearing beginning to fail. Have a look and let us know!

Jamie

moser92 said:
I have a 99 mxz 600, and yesterday I noticed there is grease on the under side of the belt guard on just the edge by the crank and also some managed to get onto the hood. I checked the backside of the clutch sheeve and it actually looked fairly dry. There was greese around the crankshaft end, and I'm sure that is where all of the grease came from. I'm not sure what isoflex looks like, but I have a feeling this is what it is.

The sled still runs ok, I checked the plugs and they are still golden brown. I ran it and sprayed carb cleaner around the seal and the rpms didn't raise. I have noticed that my rpms don't like to climb like they used to, and I didn't know if this could be the reason. I have new reeds in it this season, the carbs are spotless, and the gas is fine. The sled has about 3800 miles.

If it is the seal, is there anything else I should replace in the bottom end? If I do have to tear it down, I'm already planning on a new top end since it will already be torn apart. Let me know what you think, I want to get it fixed if this is what the problem is before I burn the motor down.

Thanks
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