[Chrisjan]

I have a full race engine, 686 CP12.5 Piston, Custom head, Custom cams, Custom fuel injection.( 2x 45mm Throttlebodies)

Wwhat is the pros and cons of taking the thermostat out?

 

[pewterpecker]

Keep the thermostat. It holds the coolant in the radiator a little longer, so you get a little less flow, but the incoming coolant is cooler.

 

[Mad Dog]

Pro: immeasureable power increase from drop in resistance

Con: difficulty getting bike up to operating temperatures and the resulting damage that ensues from running her WO when cold.