Sorry for the long delay, I've been busy with other projects. I finally found some time to do my first modification to the stock plug. I've been trying to fine tune the PZ30 carb and having a hell of a time doing so, it keeps dying while I'm riding it, wait 1 minute and it starts back up, I'm guessing the gas cap isn't letting air in, I'll fix that tomorrow, then adjust the valves.
I think I've just about got all the kinks worked out so the plug tests will come soon. Here is a pic of the first test subject, it hasn't been gapped in the picture, it's now gapped to 0.7mm. I'll also try different variations on indexing the plug, once I have some results I'll move on to modifying the NGK iridium plug.[IMG]
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Anyone have a schematic or any idea on how much plug to piston clearance these engines have?