Have you heard anything about Dyna coils? My dealer told me has installed them on 4 stroke motorcycles and the customers came back and told him it made a big difference. The coil is rated at 30,000 volts. There are varying resistance coils so you can match the resistance of your electric system without costly repairs. Its about $70.

 

I'm unfamiliar with the device, NY450ES; I think I'd like to see some comparative dyno/performance tests or have a return policy understanding before I invested in such a part.

Tree Farmer