The Honda V4 family has only one real fault - they were built by Honda.
I've done most of them from NC30 to RC30 and one thing in common is the lack of finish on the cranks. If they'd only radiused the oil holes where they break out onto the bearing surface there would have been a lot less problems. They appear to have relied on the linishing belt dipping into the oil hole to remove any burrs - didn't work very often. Even RC30's are like this.
With the cranks hand finished and bearing clearances set properly the bottom ends are pretty well bulletproof. The gear drive cam versions only seem to give problems with the "C" spring gear preload setup if abused or at high mileage. The chaindrive cam ones of course suffer from the Honda inability at the time to design a tensioner which would work. This can be overcome.
If you really want one most of the faults are well known and there are solutions available.
Personally, I could live with an RC30 quite happily - and I don't say that about Hondas very often.
Bookmarks