12-14-2015, 01:20 AM
(12-14-2015, 12:49 AM)kvdv_imp Wrote:Displaying my ignorance proudly here...if this machine is supposedly a single, what's with the 2 into 2 exhaust? Am I missing something? Super cool-looking bike, by the way. I never get tired of those classic looks!(12-13-2015, 11:11 PM)EmptySea_imp Wrote: Pretty interesting. If this bike had been available a few years, I might have bought two of them rather than the CBR250Rs we did buy. Genuine makes a couple of pretty cool scooters. I have no doubt that the G400 will be well-made as well, especially since they're using Honda underpinnings.Displaying my ignorance proudly here...if this machine is supposedly a single, what's with the 2 into 2 exhaust? Am I missing something? Super cool-looking bike, by the way. I never get tired of those classic looks!
It was a 4 valve design with 2 exhaust ports. Honda called it radial four valve combustion (RFVC). The valves were positioned radially instead of the two pairs sitting parallel across from each other. These were used on a lot of the XR series bikes in the 80s. Some even had dual carbs feeding the two intake ports. It looks like this Genuine may have a single throttle body, but it's hard to tell from the photos on that link I posted.