KustomTech Classic Line 12mm Brake Master Cylinder — Mirror Polished
If you're looking to give your handlebars an authentic vintage look without sacrificing safety, look no further. The KustomTech Classic Line TUV 12mm brake master cylinder with a mirror-polished finish is exactly what you need. Made from forged aluminum —not cheap casting—this part exudes quality the moment you pick it up.
Retro design, modern manufacturing
KustomTech is an Italian brand that truly understands custom . Every part is designed and machined in Italy with meticulous attention to detail. The Classic Line stands out with its finned cover reminiscent of 50s and 60s master cylinders, and a smooth, rounded lever that fits perfectly under the fingers. No plastic, no unnecessary frills—just polished aluminum, premium metal, and a striking look.
Technical specifications
The 12mm (15/32″) diameter piston provides smooth and precise braking modulation. It's the ideal choice for custom builds, bobbers, choppers, and café racers equipped with a single brake disc . This master cylinder fits all 1-inch (25,4 mm) handlebars —whether you ride with Z-bars, drag bars, or ape hangers, it'll fit.
And the icing on the cake: TUV approval . Unlike many custom parts on the market, this one is certified for road use . You can ride with peace of mind, even during vehicle inspections.
Finishes available
The Classic Line range is available in four finishes : mirror polished (this one), satin, raw, and black. Each version perfectly matches the KustomTech Classic Line clutch lever , available separately, for a 100% coordinated handlebar setup. The model is also available with a 14mm bore for dual-disc configurations or heavier motorcycles.
Why choose KustomTech at Holdfast?
Because on a custom build, the handlebars are what you look at every second. So you might as well put on parts that look good and brake properly. KustomTech is the choice of customizers who don't compromise between aesthetics and performance. At Holdfast in Marseille , we ride with them, we install them, we recommend them. It's as simple as that.
Manufacturer reference: 20-640
Maker : KustomTech (Italy)
Material: Forged aluminum
finish: Mirror polished
Bore: 12mm (15/32 ″)
Compatibility: 1″ (25,4 mm) handlebars
Approval: TUV (road use approved)
See as well
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Technical specifications — KustomTech Classic Line TUV 12mm brake master cylinder — Polished
- Brand: KustomTech (Italy)
- finish: Poli
- Dimension: 12 mm
- Manufacturing: CNC machining from solid stock (Italian workshop)
- Official distributor in France: Holdfast Marseille
- Shipping time: 48 hours from Marseille
Harley Davidson Brake Master Cylinder Compatibility
Compatible with all Harley Davidson motorcycles equipped with hydraulic brakes (95% of models since 1980). Check your current bore (12 mm for single-disc, 14 mm for dual-disc or 4-piston caliper).
Installation
1 to 2 hours of work. Brake fluid flush, removal of the stock master cylinder, installation of the KustomTech, brake hose connection, complete bleeding. Do it yourself if you're comfortable with hydraulics, otherwise hire a specialist mechanic.
FAQ — Brake Master Cylinders
Hydraulic or cable-driven?
Hydraulic brakes offer modern, progressive braking with precise modulation. Cable (mechanical) brakes require more effort but give the pure vintage look of old-school choppers.
Approved for road use in France?
Yes. All KustomTech master cylinders are approved for European road use (ECE standard) and are compatible with motorcycle insurance. You can install them legally.
Does the system need to be bled?
Yes, absolutely after installation. Use DOT 4 or DOT 5.1 fluid depending on your motorcycle. Allow 30 minutes for a proper bleeding process.
Why buy from Holdfast Marseille?
- Official distributor of KustomTech France since 2019
- Permanent stock in Marseille, 48-hour shipping within mainland France
- Free delivery on orders over €150
- Responsive customer service from Marseille (no returns from Italy)
- KustomTech 2-year warranty
- Expert biker advice: call +33 6 45 57 84 26
Sébastien S. (confirmed customer) –
Order placed on Tuesday, delivered on Thursday. The item matches the photos, perhaps even better in person. The satin finish is superb.
Marc G. (confirmed customer) –
The flange is very well machined, the microswitch works perfectly. Easy to install if you're careful. Very happy.