World Formula B&S ?

[SoFloMiniBikez]

What's the average Rpm Range on stock World formula?

 

[bpoirier]

The world formula has a 7100rpm rev limiting coil. They make great power between 4000 and the limiter.

 

[danford1]

You can easily change to the Blue 12,000 rpm coil. The engine won't hit 12K but the coil will allow you to rev higher than 7100 provided your cam and springs are good enough.
An out of the box World Formula has 12.5 hp.
Danford1