Ask them how they know the clutche are out af balance! did they take them off and spin balance them to check? Clutches are balanced from the mfg. unless you have some expensive equipment, you cant check the balance. Niether can the dealer. They may need a re-build, thats common. New springs, rollers and bushings is all it takes. Unless the spider is worn out. For about 350$ you can get a new clutch from comet (same as oem polaris as far as function). Idler wheel bearings... you need a snap ring pliers and a hammer to change the bearings. Drive out the old ones, gently drive in the new ones. They're just plastic wheels. Also, make sure its the bearing thats bad, you would have to take it off the mount and spin it on your finger. should spin freely, not bound up or all loose and moving side to side. There is a lot of wobble on some idler wheels, but it can be caused by the mounting shaft being worn or too small to fit in the bearing tightly. Check it out for yourself before you take any dealer or shops word for it that they are all bad. And, always ask for the old parts back!