This is an engine from a 1989 Honda VFR400nc30, with engine heads removed for maintenance reasons.
The engine is revving with the starter motor in order to see the pistons moving.
The camera frame rate is not fast enough and the pistons seem to move in a jerky way, but thats only on the video, not on reality.
Interesting though!
I have installed an rvf engine in a vfr, and the second pick up coil was all it needed to start.
Apart from that, all internal items are the same and if not exactly the same, they are totally compatible.
ForceV5 5 months ago
VFR400nc30 and RVF400nc35 engines can be used, the one instead of the other.
There are some differences, like different gear ratios, and very slightly in cam timing, but everything is compatible with one-another.
There is only ONE difference u have to solve, for a rvf engine to replace a vfr engine: Vfr engine uses a double pick up coil ignition system, whereas Rvf has a single pick up coil. U just have to add the second pickup to the Rvf engine (easy job)
ForceV5 5 months ago