OutdoorKing Repair Forum Forums Restoring, Customising and Modifying Tech Talk chonda ohv

Thanks Rob. There is one point that may have been cleared up, and one that isn't clear yet.

Here is an ignition module from a GXV120:

Here is one from a GXV140:


Here is the mounting location on a GXV140, which is the same as your chonda:


I had thought that the GXV140 and GXV160 used the offset mounting points, which the GXV140 coil pictured above used. If my recollection is correct, the GXV120s I have only have the two mounting points for the symmetrical GXV120 coil. The GXV140 and GXV160 have the three mounting points so they could use either type of coil. I had been guessing that all GXV140 and GXV160 use the large coil with the offset mounting points, but you have shown a small coil with symmetrical mounting points, and you said it came off a GXV160. So, that is the first question: do GXV140 and GXV160 engines sometimes use the small ignition module?

The second question is, can I see the other side of the carburetor insulator please, and the intake port of the chonda? The reason I ask is that I'm not yet sure it is the same as a GXV160 insulator, which is a big thick object to transition from a round carburetor opening to a square port on the cylinder head, like this:


The GXV160 uses a giant inlet port, where the GXV120 and GXV160 both have the smaller ports, which do not require the giant insulator. Also, only the GXV160 has the vacuum port in the side of the insulator. The reason this matters, is that it may turn out 163 cc chondas have small inlet ports, which would reduce their power output below that if the GXV160.