DESCRIPTION

Single Pull, Quick action thottle twist grip. High quality, manufactured from die cast Aluminium. Well known Tommaselli brand. Good quality grips included. Used on Team bikes for many years, up to a maximum of 46mm carb.

This is a 'sensible' ratio for track use. The drum is 25.5mm effective radius which means that it rotates for approx 2.25 degrees per 1mm of lift. So a 38mm carb will require 38 x 2.25 = 85.5 degrees of rotation to fully open. Bigger carbs clearly need more rotation to open, smaller carbs need less.