Gerrie,

Glad to know the glow driver came in handy, it cost me quite a bit more to get a replacement because of the Japanese Yen ...

Anyway, I assume you have tried another spark plug, & also tried putting the plug cap against the cylinder & turn the spinner back & forth to see whether there were any sparks emits? The only other thing you can do now is to install it onto another 170 conversion. If there is still no sparks, then, you know it's the cdi box.

The cdi do runs a bit warmer, board line hotter than the regular 170. However, that should not be the reason why it stopped working. You can send unit to Richard Verano of YS Parts & Service here in the US, he will look into it for you.

Good luck,

Adrian