Accossato CNC master cylinder 19mm bore folding lever
FULL RACE SPEC CNC BODY! The CNC Billet master cylinder, is Accossato's flagship master cylinder CNC machined from a single piece of solid 7075 Alloy billet. The CNC machining process allows for super critical tolerances, to give superior sealing properties, which particularly show up during hard track use. The Lever is adjustable for distance from the bar, with a folding lever to prevent the lever breaking in a crash. It's important to select the correct bore and lever ratio, for your application. A larger lever ratio gives a firmer feel with less travel, at the expense of braking force, and vice versa. For road bikes with twin radial calipers, the following general rule can be followed. Each caliper has 4 pistons 32mm or above - select 19x20. Each caliper has 2 pistons 32mm or above and 2 piston 30 or below - select 19x18. Each caliper has 4 pistons 30mm or below (R1/R6/CBR1000RR/Brembo M50) - select 19x18. Some bikes with axial calipers, suffer from quite severe flex issues and the above rule doesn't always apply - generally we would advice going 1 ratio higher than would be selected for radial calipers. As with many things in life, there are always exceptions to the rules - if you are unsure and need specific advice please get in touch via the contact page.
Aftermarket master cylinders use a different thread pitch banjo bolt, to OEM master cylinders, remember to add one to your order if needed!