Does anyone know how the DRIVEN clutch can come un-threaded? I didn't even know they were 2 separate pieces. This is for a 2007 Polaris Sportsman 450. The two pieces came apart while riding and messed up the threads due to spinning against each other. They are reverse threaded which makes it even more confusing. I called my 2 local Polaris dealers and both had never heard of this happening. $425 for a new entire driven clutch. I do not ride the quad much and when I do it is not ridden hard.

 

Can only remember one clutch that did this because of back firing that I really believe caused torque against the drive clutch and caused it to loosen. Can't verify this,but only thing I can think of other than possibly it wasn't properly torqued from the factory at 200 foot pounds.Same as yours,may not have been torqued properly and just now doing this or if you have ever had it worked on before may not have been torqued down enough.You'd think since the drive clutch turns counter clock wise the clutch halves wouldn't loosen,but can happen. Same for the slotted nut that has reverse threads holding the lower timing sprocket in place. Found plenty of those that backed off. Had to lock tite the threads and reinstall them after some had ground down the back of stator plates or worse,caused the timing gear to split the woodruff key and move on the crank shaft.

 

Thanks. I don't ride much but it sure seems like I get the odd ball problems.

Dealer tells me that If I buy a new driven clutch I can put directly on the machine using the existing spacers, no need to align with the Drive clutch. Is that true? or should I buy the alignment tool?

 

Not necessary to buy the alignment tool. I had a couple different ones and never used them any way. New clutch will come complete except for the spring and counter weights that you transfer from the old clutch. Alignment shouldn't be a problem on the drive clutch. Just check that the belt is running center of the drive clutch after you install it and doesn't creep in gear or hard to shift.