the H2 triples were fast at the time, but to make them as fast as the modern comparable bikes they need to be bored, ported and piped..and the 750 street bike motor isnt a good deal, unles sits a crotchrocket motor...i had a honda 750 air cooled 4 cl in my go kart for a while, but they dont like slamming gears for very long, but they do handle heat great....after about a year of riding in sand she blew second gear and first was on its way...i had a full vance and hines exhaust and clutch in it too... fun and fast, but they weigh a crapload, and the 600 liquid motors are lighter and have about 50% more horsepower...this is just my exp....
1985 Honda ATC250R drag trike with s/t kit and full drag CR hybrid motor and drag chassis...
1986 Honda ATC250R daily rider fully modded engine, +4 swinger,etc...
1997 Polaris Storm 800 triple, boyesen reeds, dg individual silencers, 240 studs, 123mph on radar...