Universal Parts
Blue Line Right-Hand Brake Master Cylinder | 7/8" Bar Mount
Description
Restore responsive, dependable stopping power to your ATV, dirt bike, or motorcycle with the Blue Line Right-Hand Brake Master Cylinder. Engineered as a durable factory replacement, this complete master cylinder is built to endure harsh riding conditions and deliver immediate hydraulic pressure to your front brake system. Features a bottom-mount brake line port, an integrated brake lever, a brake switch, and a banjo bolt. Clamp diameter: 22mm (7/8"). SKU: 100-249.
Note: This unit does not include a mirror mount thread — ideal for ATVs, dirt bikes, and motorcycles with body-mounted or stem-mounted mirrors. If your application requires a handlebar mirror, see our Right Master Cylinder with Mirror Mount.
Mechanic's tip: After installing, fill the fluid reservoir and fully bleed your lines to clear any trapped air that causes a spongy lever feel. Always protect plastic fairings with a lint-free cloth — brake fluid will instantly damage plastic coatings.
Features:
- Bottom-mount brake line port for clean routing on compact handlebar setups
- Integrated right-hand brake lever, blade connector style brake switch, and banjo bolt included
- 22mm (7/8") clamp diameter fits most common small-to-mid displacement handlebars
- No mirror mount thread — ideal for ATV, dirt bike, and body-mirror applications
- Universal fit for any vehicle with a 22mm handlebar and front hydraulic disc brake
Specifications:
- Handlebar clamp diameter: 22mm (7/8")
- Brake line port: Bottom-mount
- Mirror mount thread: None
- Mounting position: Right-hand handlebar
- SKU: 100-249
Compatibility:
| Vehicle Type | Common Applications |
|---|---|
| Youth & Sport ATVs | 70cc–125cc entry-level and recreational four-wheelers with front hydraulic disc brakes |
| Dirt Bikes / Pit Bikes | 50cc–125cc pit bikes and off-road dirt bikes with 22mm handlebars and hydraulic front brakes |
| GY6 Scooters & Go-Karts | Chinese GY6-powered scooters, mini bikes, and go-karts with 22mm handlebar hydraulic brake setup |
| Custom / Recreational Builds | Mini choppers, pocket bikes, electric bikes, and custom builds using standard 7/8" handlebar clamps |
Product Diagrams
Features
Specifications
Handlebar clamp diameter: 22mm (7/8") | Brake line port: Bottom-mount | Mirror mount: None | Position: Right-hand | MPN: UPJ 4870 | SKU: 100-249
Model Fitments
Universal fit for ATVs, dirt bikes, pit bikes, GY6 scooters, go-karts, mini choppers, and custom builds with 22mm (7/8") handlebars and front hydraulic disc brakes
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
