Racetorx Brake Junction Valves
£42.49 – £54.99
Racetorx Brake Junction Valves
£42.49 – £54.99
Racetorx Junction Valve.
Having your thumb brake or finger brake installed in conjunction with your rear master cylinder has never been easier!
Our Junction valves are dual-fitting kits.
Junction valves go into the rear (foot) master cylinder and allow both Thumb brakes & scooter brakes to work in conjunction with the footbrake master cylinder.
So far we offer 6 types-
RTX450 which is used in the likes of Brembo Master cylinder Part number – 10850560 Primarily Aprilia RSVR/RSV/RS660 & Husky
RTX452 is a Teardrop shape with a M4 bolt this is used in Brembo, Nissin and aftermarket master cylinders ( NOT SUITABLE FOR AFRICA TWIN) Fitment for older generation honda's.
RTX477 is the Titanium long neck type which fits in Nissin and aftermarket type master cylinders with a plastic nipple and circlip, ID = 18.5mm Most commonly on Kawasaki, Honda, Triumph & Suzuki)
RTX479 is the Titanium long neck type, this is suited for some Brembo & aftermarket type master cylinders with a plastic nipple that can spin, ID 14mm. (first of its kind) for OEM brembo masters like on the KTM superdukes, Ducati and BMW's)
KTM models using a JJ master cylinder is not yet available, this is known to be fitted to any KTM adventure 890/990 potentially also used on other KTM 890 and 990 models!
RTX506 is used on Yamaha YZ and WR 250/400/426/450cc models.
RTX595- Teddy bear Is for-
- CR125R 2002-2008
- CR250R2002-2008
- CRF150R/CRF150RB 2007-2020
- CRF250R/CRF250RX/CRF250X/CRF250F (Does not Contain CRF250L CRF250RL)2004-2020
- CRF450R/RWE/RX/X/L 2002-2020
- CRF 250 2006 FITS 2002-2020
RTX613 M24 - is for the new 2024 model master cylinders - CRF450 and husky but as this is a new type please send a picture to confirm first.
Please contact us if you are unsure, See the list below for what fits what so far.
A DOUBLE BANJO ON THE REAR (FOOT) MASTER IS NOT THE SOLUTION AND WILL NOT WORK THIS IS WHY JUNCTION VALVES ARE REQUIRED.
Thumb brake- www.racetorx.co.uk/product/rtx300
Venhill braided brake line- www.racetorx.co.uk/product/venhill

FITTING SERVICE
We offer a fitting service at our workshop.
Location - Peterborough UK PE4
4 reviews for Racetorx Brake Junction Valves
Only logged in customers who have purchased this product may leave a review.
Donald MacFadyen (verified owner) –
Excellent quality, easy to fit and works a treat.
Great customer support and service.
kay (verified owner) –
i was intall on 929 Cbr RR, very easy work so good
Moto Rapido Ducati (verified owner) –
We have this fitted to Christian Iddons BSB V4RS Ducati and also Ben Curries Panigale V2, perfect for adding an additional braking system such as the Racetorx thumb brake.
Luca (verified owner) –
8 months ago I purchased a junction valve and had the chance to fit it just 2 months later, finding a leaking o-ring.
Without much of a hope I contacted racetorx to see if a replacement seal was available and to exchange some thoughts about the installation, line routing and related stuff…. Behind a high end products company, I found a really good person. He helped me a lot, sent a whole new kit for free that has been lost in the shipping, sent another one without even knowing anything about me.
I’ve been told to keep the old valve as spare. I’m not used to deal with such professionalism, that actually went far beyond the loss of money…
The care, the service, are priceless.
The piece itself is a jewel as expected, looks great, works even better, but that’s not the point.
All these words just to say Thanks.