According to what I read ... racing spark is based of cool
material, it is good for your bike if u use it for racing. When
racing, biker rev the rpm very high and non-stop for a long time.
So this help the engine cooler and prevent over-heat.
It won't make your bike faster if u are not racing (running in
medium speed), additionaly, bcoz it uses cool material, it is
harder for you to start the bike in the morning...
the info I read from www.motorplus-online.com ..
but it is in indonesian ... 