Automotive parts and accessories repair kit designed to restore front brake and clutch pump function on motorbikes and scooters. For riders seeking a straightforward, durable fix, JNNJ Master Cylinder Repair Kit includes pistons, springs, gaskets and rubber fittings for 12.7mm hydraulic clutch and brake pump pistons. Will it suit a DIY rebuild or is a workshop replacement preferable?
⚡ At a Glance
- • Material Quality: High-quality aluminium alloy construction for greater durability and strength
- • Best for: Motorbike, motocross and scooter owners repairing 12.7 mm hydraulic clutch and brake pump pistons
- • Not ideal for: Systems that use piston sizes other than 12.7 mm or where OEM parts are required
Aluminium-alloy master cylinder repair kit includes pistons, gaskets, springs and rubber fittings for 12.7 mm hydraulic pump pistons. Designed to simplify front brake and clutch pump rebuilds and restore reliable operation.
Long-lasting repair – Thanks to aluminium-alloy construction
Aluminium alloy components are specified for higher durability and strength and are intended to deliver a long service life. The materials and design aim to withstand routine hydraulic pump stresses.
Expect a sturdier rebuild than worn original parts, reducing the frequency of repeat repairs and improving confidence in braking and clutch operation.
Complete rebuild in one kit – With pistons, gaskets, springs and rubber fittings
The kit bundles all listed spare parts required for a master cylinder service, covering internal pistons, sealing gaskets, return springs and rubber fittings. Two styles are available, matching either top pump or one-piece pump configurations.
One purchase supplies everything needed for a single overhaul, so parts do not need sourcing separately during a repair session.
Restores pump performance – Thanks to parts sized for 12.7 mm hydraulic pistons
Components are specified for 12.7 mm hydraulic clutch and brake pump pistons, matching common dimensions used across many motorbikes, motocross bikes and scooters. The design aims for precise fit and practical installation.
When fitted to compatible systems, the kit helps recover dependable clutch and front brake pump action, improving control and ride safety.
✨ The 4 Key Reasons for JNNJ Master Cylinder Repair Kit
Complete kit – Replace pistons, springs, gaskets and seals in one job
Quality standards – Meets or exceeds required repair specifications for dependable results
Precision design – Exact fit meant for 12.7mm hydraulic pump pistons
DIY-friendly installation – Simple replacement reduces workshop time and complexity for most riders
📋 Technical Details at a Glance
- Category: Automotive Parts and Accessories
- Brand: JNNJ
- Product ID: B0CGR2NSQ1
- Compatible piston size: 12.7 mm
- Materials: Aluminium alloy
❓ Frequently Asked Questions
Q: Will this kit fit my motorcycle's master cylinder?
A: The kit is specified for 12.7 mm hydraulic clutch and brake pump pistons and is intended for motorbikes, motocross bikes and scooters; confirm piston diameter before ordering.
Q: Are all necessary parts included for a rebuild?
A: The kit contains pistons, gaskets, springs and rubber fittings, providing a complete set of internal components for a single master cylinder repair.
Q: Is the kit durable enough for regular use?
A: High-quality aluminium alloy construction is stated for higher durability and strength, aiming to deliver a long service life.
🏆 Our Verdict
The JNNJ Master Cylinder Repair Kit is suitable for riders and home mechanics who need a complete rebuild solution for 12.7 mm hydraulic clutch and front brake pump pistons. A full set of pistons, seals, springs and fittings combined with aluminium-alloy parts is the key selling point, aiming to restore reliable operation. While initial suitability depends on piston size, the kit offers clear long-term value by avoiding full unit replacement and reducing repeated service needs.
