Squawking Clutch

Pull the cover and start checking things out. I wouldn’t ride it until you get this sorted out. Let us know what you find.

The legendary "donkey" sound..is the belt slipping just a little on takeoff. Usually the cause is the secondary not returning to rest after coming to a stopping or shifting into reverse.
You need to service the secondary. Pull it apart clean it and re-grease it. While your in there check the entire CVT out for damage or wear.
Plenty of posts and videos covering service of the CVT.

X-3 with above and will add if the belt has narrowed it will not sit tight in the primary so at take-off the is a slip until the weights move to add pressure to the belt.
If you replace the belt we recommend using O.E.M.
Hold your belt next to a new one (use your local dealer) to compare.

Thanks guys! It has been driving me nuts, not to mention it makes my skin crawl. Going to install new CV joints today hopefully so I'll get in there and see what I can find!

The 660 service manual doesn't list any specs on the belt. The 660 and 700 use the same belt the 700 spec is 33.3mm wide down to 30mm wide.
A worn belt will normally involve much more slipping and not just the short squawk. Also a belt worn can cause noticeable loose of top end similar adding shims.

reogem said:

The 660 service manual doesn't list any specs on the belt. The 660 and 700 use the same belt the 700 spec is 33.3mm wide down to 30mm wide.
A worn belt will normally involve much more slipping and not just the short squawk. Also a belt worn can cause noticeable loose of top end similar adding shims.

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COULD BE SOMETHING SIMPLE LIKE AN OIL LEAK IN THERE GETTING ON THE CLUTCH SHEAVES. OPEN HER UP

Finished working on it. Greased the shafts and the inside shaft on the shive and the squawk is gone. Thanks all for the input!