There's an FS650e in good condition near me and I'd love to get it, however my father would like it to be a bit less powerful, I didn't take it on to the road in the test ride, however he did and said it wanted to come up in nearly every gear(it had a rather large back sprocket). What kind of options do I have in regards to restricting it(no need to restrict it a huge amount)? I've seen that bikes are often restricted to comply with a2 license laws by restricting the throttle or the carb. Are there any known and tried methods for the FS650e?