Discussion at Motorized Bicycle Engine Kit Forum in the Bicycle Engine Kits forum. I haven't even gapped mine, just stick it in and it runs more or less. I think I'll ...
I haven't even gapped mine, just stick it in and it runs more or less. I think I'll go down and gap it just for fun. By the way I bought a new plug and wire today but haven't installed them. Now all i could get was the champion interchange whatever it is. So how bad is a Champion plug.
I think Champions are good I fly behind them and so far no problems and use them in most of my toys and at work. I don't even have problems with the plug that comes with the engine kit. I do modify them and the post is on this forum and I run less gap .020 to .017 or what ever will make it run the best I cheat, plug gap is only a recommended thing ,and I don't play by the rules all the time.
Norman
get a gap tool at any automotive store and make sure the gap at the bottom of the spark plug is at the gap you wish to run
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For checking spark I use a spark plug tester, I find it to be so much easier. You can even make your own using a good spare plug. Just get some aligator clips and solder on to it.