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now what?


Joe Breaux

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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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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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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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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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with only 500 miles on it seems unlikely its a wheel bearing or U-joint.. There is no slack in any of them.. I checked.. and they were all spinning 15 mph on jack stands.. no noise.  The noise isnt coming from a wheel, it sounds like a transmission noise, like a power steering pump or trans pump  but its not fluid drive, its belt... If it was wet clutch it would make noise on take off or idle but it doesnt.. It starts about 5 mph and increase with speed......   its just more weird crap that only Massimo seems to suffer from .. I guess when it breaks , I ll know what it was. ..................

Otherwise its running great.. I installed an adjustable temp switch  [ from EBAY , $19 } into the circuit where the old radiator thermoswitch connected,   with a probe to radiator . and set it to keep engine at 140-150 degrees  now that winter is here.. seems to work just fine.. No more overheating issues since Yamaha parts installed . Starts instantly, idles perfectly, plenty of power on trails.  4 WD works fine ,,,,JUST THAT DAMN WHINING from under my ass  .. annoying as hell.. 

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