The link says I'm limited to 35mph? for NH that is. Not clear if it's limited to 35mph roads or what.
Road legal kei cars in the following categories can go as fast as you want
1. Antique
2. Previously Government owned
Both have a federalized title without limits
Some states allow NEV/LSV over a certain age to go higher speeds but you need to stay off the interstate, Wisconsin has some old case law on this subject that could be argued for owner rights to modify if the low speed vehicle is 10+ And public usuage on high speed roads as long as a low speed vehicle sign is displayed.
one guy would drive them on the interstate anyway and have to pay a fine once or twice a year but the fine was cheap enough that he didn’t care.
In the case of medium speed legislation (35mph) you are allowed on 45mph roads
However, Generally if you aren’t a fragrant dbag the police will ignore an LSV on surface streets going the speed limit,
I’ve had my fathers 25mph+ NEV on county trunk highways 40-55mph, display slow moving vehicle sign, keep right and be curtious and nobody cares.
freeway you do so at your own risk