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Well, overheating finally resolved.. 500 miles on MSU500 now , runs great... Heres the rub.. transmission seems to be making a whining noise in gear only .. increases with speed.. anyone got any ideas?  Oil was just changed last month and is full and clear.   Just cant express how happy I am with Massimo!!! NOT!!!

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Well, overheating finally resolved.. 500 miles on MSU500 now , runs great... Heres the rub.. transmission seems to be making a whining noise in gear only .. increases with speed.. anyone got any ideas

well, with motor cover off,  riding in the bed, theres so much noise going down the trail that I cant hear the whining  ,so I cant isolate it with a hose .. Put cover back on, theres the whine again..

noise still there, but damn thing is running great..  no issues ...new adjustable temp fan control works perfectly..   temp is in a safe range all the time now.   . hopefully it will continue 

no, its fully engaged, pulls normally. no noise shifting into or out of gear or while  idle in gear.. just a  whine as you drive that increases with more power.. no noise in neutral or reverse .. sounds kinda  like a power steering pump low on fluid.. but theres no power steering on it 

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not yet... My ATV mechanic is out of town for 2 weeks  .. seems  like its coming from  the CVT .. Continuously Variable Transmission section.. maybe the drive belts are already worn out at 500 miles? .. Would not surprise me.. Such poor quality parts in this thing .. just spent $1500 on it to cure the overheating  .. I really regret the day I let my Dad talk me into buying it instead of the Honda Pioneer.. I now have as much in this one as the Honda sold for.. oh well... live and learn.. 

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2 hours ago, Travis said:

Kawasaki's CVT's in their mules whine from day one at increased speed.

Really? I was not aware.  maybe it s not a big deal then... I sure hope so.......... but 500 miles on it without whine..seems odd it just starts now.. and you know how  I have  confidence in Jackassimo quality 

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11 minutes ago, Joe Breaux said:

Really? I was not aware.  maybe it s not a big deal then... I sure hope so.......... but 500 miles on it without whine..seems odd it just starts now.. and you know how  I have  confidence in Jackassimo quality 

 yeah, once you get up to about 12-15 mph, there is a slight whine, but you're right, 500 miles with no whine, then all of the sudden... that's sounds suspect.

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4 hours ago, Joe Breaux said:

this whine starts at 3-5 mph and increases as you go faster in either LOW or HIGH gear positions.. .  does not make it in neutral so its not engine , has to be in that CVT contraption.. 

is your CVT similar to this? spacer.png

 

 

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29 minutes ago, Joe Breaux said:

I believe so.. it use belts on tapered pulleys  to change the gear ratio according to rpm vs load .. I hope the noise is just the belts humming 

well if it doesn't do it in neutral, then it's not the CVT belt or pulleys as they operate the same regardless of what gear you're in.

something internal.

 

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Well, I guess when it breaks 5 miles in the woods, I ll find out  what is making the whine .. and you know thats when it will break , not unloading from trailer .. I m pretty sure its not the wet clutch or the gear assembly or bearings , because the oil is clear and clean ,no metal or clutch material in it, no burnt smell... and no noise at all idling or while revving engine .. so its in whatever turns with driveline.. but not coming from rear axle area..

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  • 2 weeks later...

Well, I asked for  help from Motorcycle Doctor that someone suggested.. They said jack it up on jack stands and run in gear to isolate noise.. seemed reasonable..  tried just rear wheels.. makes no noise, tried all 4 wheels off the ground... nothing.... not a peep.. just like revving in neutral.. NO NOISE!  . put it back on ground and the whine is still there. in high or low  range and 2 or 4 wd  .. scratching my head... 

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