V-45 was the 750, 45mm stroke. Like the V-45 the V-65 was also a 90 degree motor. The V65 was just under 1100 ccs and the VF700 was at 698 to beat tariffs. The hybrid was the VF 750 like above. 80+ horsepower and was a very good runner.
Oh, once you get it running be very careful about oil. The V4 like you have hates long distance low RPM running, it starves the top cylinder of oil and is a cam killer. Over 3k is where is happy. Also cold starts then running is a cam killer.
There is a mod where you can run from a boss exterior to the top cylinder to help to prevent that by making a more constant supply of oil.
They were very good running machines but the valves were a bit sloppy in machining. Honda was really a shim over bucket company for a very long time before the v-fours so there was a little bit of a learning curve for them.
In late 84 they covered under warranty new cams to tighten clearance. Not sure if that worked or not.
Good luck with your new find.
