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 44mm carb.

This is a 'sensible' ratio for track use. The drum is 25.5mm effective radius which means that it rotates for approx 22.5 degrees per 10mm of lift. So a 38mm carb will require 3.8 x 22.5 = 85.5 degrees of rotation to fully open. Bigger carbs clearly need more rotation to open, smaller carbs need less.