That looks like a much better deal!More than decrease engine performance. Take away so much power it will kill the engine. Not turning power but electricity power so spark is weak. I tried with those exact lights and different lights but no success yet. I did buy rectifiers and have them to try and get a small charge to a small battery one day but I always ride the electric bike at night so I stopped playing with it.
It's possible this may work but I haven't tried.
Fits most of the 66cc/80cc Chinese 2 Stroke Engine. - Perfect for your lighting needs and other electronic accessories. - Made with high-grade material for durability and reliability.rover.ebay.com