POTOSI, Wis. — A 21-year-old Madison man was seriously injured Saturday afternoon when his motorcycle struck a guardrail on State Highway 133 just north of Dogtail Road, the Grant County Sheriff’s Office said.
The sheriff’s office received the report of the single-vehicle crash at 2:06 p.m.
Investigators said the man was traveling south on a 2023 Kawasaki EX400 when he failed to negotiate a curve and hit the guardrail. He was wearing protective gear, authorities said…