4.0 throttle slide for Dellorto SI 24/24 carbs.

To comply with emissions the for new PX, the SI carbs are fitted with a throttle slide with 2 additional air pockets. This effects the mixture and can cause pinking and piston jams on tuned engines. The solution is to replace the throttle slide with a thicker throttle valve without any air pockets which  the 4.0 throttle slide does.

*CNC-milled, hard anodised.

84920400