Rear Brake Master Cylinder – Vespa GTS 250/300
Rear Brake Master Cylinder – Vespa GTS 250/300
$100.15
Out of stock
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Product Details
Description
Rear Brake Master Cylinder – Vespa GTS 250/300
Replacement Part Details
Use this part when the original component is worn, damaged, missing, or no longer working correctly. Many scooter parts can look similar but use different sizes, plugs, brackets, thread patterns, or mounting styles, so careful comparison before purchase is recommended.
Related Categories
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Fits Models / Common Applications: Vespa and other compatible models may apply.
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit a Vespa?
A: This SKU is listed with Vespa model fitment where the scooter also matches the listed engine or fitment notes.
Additional information
Vespa GTS 250/300 Rear Master Cylinder
Don't compromise on safety with a spongy or leaking brake lever. Over time, internal seals in your master cylinder can perish, leading to inconsistent braking pressure and dangerous fluid leaks. This high-quality aftermarket replacement restores that crisp, "factory-fresh" lever feel and ensures your Vespa GTS has the reliable clamping force needed for heavy city traffic and high-speed touring.
Key Features
OEM-Spec Performance: Manufactured to meet or exceed original Piaggio specifications for a direct, "no-fuss" swap.
Precision Bored: Features a high-tolerance internal cylinder for smooth piston travel and consistent hydraulic pressure.
Durable Housing: Cast from high-strength alloy to withstand high-pressure braking cycles and environmental corrosion.
Pre-Assembled: Comes with the internal piston and seal kit pre-installed, saving you the headache of a complex rebuild.
Fitment Guide
Technical Specs
Part Number: CM074901-AFT
Material: Cast Aluminum Alloy
Position: Left-Hand Side (Rear Brake)
Compatibility: DOT 4 or DOT 5.1 Brake Fluid (Consult Manual)
Maintenance Note: Brake fluid is hygroscopic (absorbs water). If your old master cylinder failed due to internal corrosion, ensure you perform a complete system flush with fresh DOT 4 fluid to prevent the new unit from fouling.
Installation Tip: Always use new copper crush washers on the banjo bolt. Reusing old washers is the #1 cause of slow leaks at the master cylinder connection.
Pro Tip: Vacuum bleeding is highly recommended for the GTS series. Because of the long brake line run from the handlebar to the rear caliper, getting all the air out manually can be a time-consuming process.
You can also purchase this part through your local Genuine dealer.
WARNING: California Proposition 65
