Predator 212 on CT200U

[delray]

That is an interesting subject with a lot of different opinions. Some guys who race with these engines will tape up the blower housing intakes to get the engine running hotter for better performance.

Dyno cams recommends blocking all but one of the blower housing recoil air intakes because the PVL flywheel fins move so much air.

Some will poo poo the concern and say they run without the tin and never had a problem. They may be right for the mini bike and go kart application. But as a stationary utility engine on a calm hot day it may become an issue. And we have to remember that Honda didn't design these engines for mini bikes and go karts where you get air flow from the act of riding. The tin stays on my engines. There's no reason to remove it.

yes,gokart guys will tape up there housing when running there engine on cool nights and it has been showed on dyno results that you can gain almost 1/2 hp buy creating less drag from the cooling fins.
arc racing is now selling a new short fin billet flywheel for the minibikes and gokart guys. just don't need all that air movement on a minibike or gokart.