Racetorx Thumb Brake With BREMBO Master Cylinder

1. Racetorx Thumb brake mechanism

2. Titanium Banjo bolt with copper washers

3. Racetorx GP-inspired reservoir tube and cap 

4. Brembo 11mm or 13mm master cylinder if chosen from the drop-down menu

• 11mm Master cylinder for single cylinder 125cc-500cc motorcycles (supermoto, motocross, trails & road)

• 13mm Master cylinder for 2, 3 & 4 cylinder 500cc – 1400cc motorcycles (Road, track, superbike and adventure)

Racetorx Thumb brake

Made from T6 billet aluminum, Hard anodized in either silver or black, Hardware including pivot pins and pushrods are made from Ti 6Al-4V Titanium. The thumbscrew provides a detent ball for precision and a 13mm Brembo master cylinder for reliability and perfect thumb pressure with the thumb lever providing a knurled finish for grip. Handlebar fitment is the standard 22mm which 95% of bars are and in the coming months, other mounting options will come available. This wonderful kit provides 4 points of movement to give you the best position to suit you! Comes complete with our GP reservoir tube kit in a color of your choice. To complete the kit you can either go directly to your rear caliper or you can have the rear foot master cylinder in conjunction. You can order specific lengths of braided lines from either Venhill or Goodridge. If you decide to have the rear foot pedal usable in conjunction you'll need to fit a "Junction Valve" to your rear master cylinder which feeds into the reservoir port. This is a very simple layout and we are happy to assist where we can.

THE THUMB BRAKE KIT IS UNIVERSAL TO ALL BIKES.

MASTER CYLINDERS-

• 11mm Master cylinder for single cylinder 125cc-500cc motorcycles (supermoto, motocross, trails & road)

• 13mm Master cylinder for 2, 3 & 4 cylinder 500cc - 1400cc motorcycles (Road, track, superbike and adventure)

When using your foot in a road/race boot or a motocross boot you can not gauge pressure, with your thumb you can gauge the pressure through the paddle, this means more control breaking in a corner on a race track, angle of the bike in the air on a motocross track, on a trails bike in a technical route and even wheelie control on a stunt bike. 

A lot of people ask What is a thumb Brake?

A1: If you want to fit the Thumb brake direct to the caliper, (NON-ABS models) Remove the rear foot brake pedal and master cylinder and remove the braided line (be sure to keep the brake fluid clear from the bike as much as possible, also when removing the surplus parts clean any residue spilled)

Fit the thumb brake and feed a pipe or cable up to 10mm thick in the routing location you want, this would be from the thumb brake master cylinder port down to the rear caliper routing under the top yoke, under the tank and down the right side of the bike. This is so you can work out the length of braided line you require.

A2: If you want to fit the thumb brake in conjunction with your rear foot brake, (This includes ABS models) Remove the reservoir on your foot master cylinder, some will be a screw-in adapter, some with a teardrop adapter with a small M4 bolt, others will be a plastic adapter pressed into a donut-like rubber, these just pull out with a good tug and wiggle (don’t be shy). Clean brake fluid that will spill out and in the area the junction valve locates, then fit the correct “junction valve” to suit the master cylinder. Racetorx so far does the Cylinder type that screws into the built-in reservoir and the Teardrop type.

Fit the thumb brake and feed a pipe or cable up to 10mm thick in the routing location you want, this would be from the thumb brake master cylinder port down to the rear foot master cylinder routing under the top yoke, under the tank and down the right side of the bike. This is so you can work out the length of the braided line you require.

Bike Fitment-

These are a universal kit for the majority of motorcycles, Road bikes, race bikes, adventure bikes and even motocross bikes.

We have the most adjustable thumb brake on the market and even then our kit on some bikes can touch fairings, tanks or frames, This being said with the adjustability you can work around it nicely most of the time.

Motorcycles with Handlebars have the most clearance whereas if using clip-ons you can have some challenges, the Ducati V4 Penagale has no room and the fairing would need some modding, Ducati V2 Penagale is similar with more clearance but still touches at full lock.

Adventure bikes. motocross bikes and streetfighter bikes all have clearance.

The list would be endless but to give some idea of bike styles which our kits are fitted to so far-

• Ducati V2 (David Shoubridge) WSBK

• Ducati V" & Ducati V4 (moto Rapido) BSB

• CBR1000 (Michael Dunlop) IOM TT

• Kawasaki zx10 (FS3 BSB)

• Aprilia RS660

• KTM super duke 1290

• Yamaha Tenere 700 & World raid

• Yamaha MT10

• Yamaha YZF 250

• Yamaha YZF450 & WR450

• KTM 690 SMCR

• KTM250 2 stroke

• KTM 300 EXC

• Yamaha R1M

• BMW M1000 (Tas BMW BSB)

• Honda CRF450

• Honda SP2