its gaped at .25
.045
.035
I don't think that you need to gap the plug if you get a plug that is specific to your bike. Mine has a NGK R6252K-105 in it. I think that is the same type of plug that they come from the factory with. If you're not getting spark then you probably have a fouled plug or something else wrong.
We use the nkg br9eix
.035 gap
Ngk r6252k-105
0.7 mm
Thre is no gap on the plug as it a surface fire plug.
.028-.032 will work good.
Remove from engine and use an ohm meter on the ends
If you just bored it once or twice over, your stock spark plug will be all you need. A NGK BR10ECM (or corresponding plug from another brand) with a .032" (0.8mm) gap.