Problem with take off.

New to SXS family. Just purchased a Stealth 2014 800S with EFI and EPS. Seems like when give it gas it has to wind up to go. Delayed take off. When it goes it does take off. Seller said this RZR had no problems. I am worried there is a clutch issue right off the lot. Any advice or comments that would help with this problem would be greatly appreciated.
Thanks All.
Green Hornet