http://dmv.ny.gov/registration/register-snowmobile
How do I register my snowmobile at a DMV office?
Bring these completed items to a DMV office
a completed Snowmobile Registration Application (MV-82SN)
payment for fees and sales tax, or proof of sales tax payment or exemption (see sales tax information)
proof of ownership and bill of sale - Non-residents can use photocopies of proof of ownership and aren’t required to pay the NYS sales tax if the snowmobile is registered in another state
proof of identity and age 3
cash, check or credit card for the $100 registration feeif you have a current, valid NYSSA voucher, and bring the voucher to the office, the fee for your registration is $45.00.
What is a New York State Snowmobile Association (NYSSA) Snowmobile Club voucher ID Number?
If you are a member of a NYSSA snowmobile club, you receive a voucher that includes an ID number. The ID number is located in the top right corner of your voucher, above the barcode. If you have a current NYSSA voucher, enter the voucher ID number in the box provided. If you do not have a current voucher, skip the voucher ID number section.