spark plug?

Bumping this to the top because it was never answered.

Now, I'm using automotive knowledge here but, if you're running higher compression and creating more heat, you will need a cooler spark plug to keep the heat down. Otherwise you'll end up hurting your engine and cook something. I run a B7HS since I ride hard in the summer with 100+* heat. I think that running a hotter plug may make it run lean, since it will be hotter and would cause detonation.

A spark plug won't change you fuel mixture. Normal plug for a china girl is a B6HS. I sometimes run a B5 in the winter. For higher compression I would recommend a 7 or even an 8 depending on how high.

Normally I tend to like the NGK BP6HS plugs that have extended tips, but some motors like them and and some don't as much. You have to try them both back to back to find out.

Don't run a gap bigger than about 0.025" because it's hard on the china girl toy magnetos.