People generly Keep bikes and cars in good condition. If a motor hasn’t been taxed for 2 years then it has to go thru the manx test, but as long as you keep taxing it (do a year skip one) all is fine. I’ve never been stoped by the plod there main gripe is speeding thru the villages and the fines can be as much as a tenner per mile over. I don’t actualy know what the police do over here, you only see them at TT time.