One pin ground bolt found on two stroke and motorcycles mostly, check your connection.
High Performance Racing Coil with single plug
A lot of two stroke use this coil please check yours because a lot use the two plug also, both do same job but wired different which can be modified
More voltage to coil , better quality so cap and wire which what really fails in coils the most plus a stock coil wore leaks like mad, grab one to get shocked plus caps break all the time so upgrade for better performance.
Straight Up Performance and Scootertronics make custom coil set up with CDIs and NGK race wire and caps with spark plug for best performance with long lasting life along with a overall performance upgrade.