Bob, the GXV120 has a Keihin BE03A, GXV140 has a Keihin BE52B, and GXV160 has a Keihin BE66C. They are all Keihin BE, but while the 03A and the 66C have a built-in fuel tap on the carburetor, the 52B does not. They all have the same layout otherwise, and a lot of the parts seem to be interchangeable. I've been told that you can fit an 03A to a GXV140, and a 52B to a GXV120. They will also both go on a GXV160 except for a minor difference in the mounting studs on the 160 engine - some filing seems to be called for. So, it seems you could adapt the BE03A from your HR194 to a GXV160, probably with a bit of minor work. Idle jet seems to be the same. There is probably a minor difference in the main jet and emulsion tube, but the way it runs may not be objectionable.
I haven't found out anything about the ignition module - there's a good chance the GXV120 one would work. The GXV120 starter looks broadly similar to the GXV160 one but I don't think it is actually the same part. The GXV140 one is very different from both of the others.
Post-edit: The GXV120 ignition module has different mounting points from the one used on both GXV140 and GXV160. The GXV160 starter is not the same as the GXV120 one, despite a superficial similarity in appearance. It is taller, heavier, and uses a different drive dog approach.
Last edited by grumpy; 17/11/13 06:21 PM. Reason: Add Post-edit
