hows the ground wires ???? black wire have good clean connection at the coil ???
and you'll need a tester to test the plug boot and plug wire, but you may be able to look into the boot where you're at with what little tools you have, lookin at the plug terminal inside, and for cracks/melting, then you'll need to meter test the coil and stator,
electrical troubles luv to show themselves only at high rpm's and under load
all that after you confirm no airleaks, spotless carb circuts/jets, float level, float condition and petcock fuel flow
and you'll need a tester to test the plug boot and plug wire, but you may be able to look into the boot where you're at with what little tools you have, lookin at the plug terminal inside, and for cracks/melting, then you'll need to meter test the coil and stator,
electrical troubles luv to show themselves only at high rpm's and under load
all that after you confirm no airleaks, spotless carb circuts/jets, float level, float condition and petcock fuel flow