Originally Posted by yorkie_chris

Because the carbed bike is totally different, with the washers in place it's like having the throttle partially closed, so the sliders open by the same amount as if you'd used 33bhp worth of right hand. Giving the same fuel-air mixture as normal. No problems...

HOWEVER, do the same thing to an injected bike and the injection will dump in the same amount of fuel. Making bike run sloppy rich, giving it bad power delivery and fuel economy. Fouling up the plugs etc etc...