All motorcycles that are only being operated off the highways, as defined in s. 23.335 (1) (y), are not required to be registered under this chapter but shall be registered as required under s. 23.335 (3).
Wis. Stat. § 341.059
Off-highway motorcycles
2015 a. 170.
Official source: Wisconsin State Legislature. Reproduced from public-domain Wisconsin statutes; confirm against the official source for the current text. Not legal advice.