MWMNUN Mini Bike Hydraulic Brake Caliper Kit for Baja Doodle Bug DB30 Blitz — 50" Hose, Left 7/8" Master Cylinder, Includes Pads

MWMNUN Mini Bike Hydraulic Brake Caliper Kit is a direct-fit hydraulic disc brake system with a 50-inch hose and master cylinder designed for Baja Doodle Bug DB30, Blitz, and similar 97cc–98cc mini bikes. This kit upgrades mechanical stopping to hydraulic power, giving compact mini bikes stronger, more consistent braking without bulky components. It includes a preassembled caliper, master cylinder sized for left 7/8" handlebars, a 50-inch brake hose, brake pads and basic mounting hardware so you can replace or refresh the rear brake setup quickly.

Will this fit my Baja Doodle Bug DB30 or Blitz mini bike?

Yes — the kit is made to fit Baja Doodle Bug DB30 (including Baja Blitz, Baja Racer, Baja Dirt Bug) and other 97cc–98cc, ~2.8–3.0hp mini bikes that share the same mounting pattern. Confirm your bike uses left-side 7/8" handlebars and has a 2" center-to-center caliper mount spacing before ordering.

• Designed for Baja DB30 and similar 97cc–98cc mini bikes
• Left-hand 7/8" handlebar master cylinder configuration
• Caliper mount: 2" center-to-center bolt spacing
• Some models may need minor brake-mount modifications

How does it improve braking performance on trail or street rides?

The hydraulic caliper offers firmer, more immediate clamping than typical mechanical systems, producing steadier stopping force under load and repeated braking. This reduces hand lever effort and improves modulation, making the bike easier to control during slow-speed maneuvers or emergency stops.

• Hydraulic actuation for stronger clamping force
• Improved lever feel and reduced rider effort
• Consistent braking under repeated use
• Includes replacement pads for renewed bite

What comes in the box and what tools are needed to install it?

The kit ships with the caliper and master cylinder assembly, a 50-inch brake hose pre-fitted, two brake pads, six cable ties, two mounting screws and a small wrench. Basic hand tools (socket set, hex keys, and possibly a drill or file for slight bracket modification) are typically all that’s required for installation.

• Included: caliper + master cylinder, 50" hose, 2 pads, 6 ties, 2 screws, wrench
• Tools commonly used: hex keys, socket or wrench set, brake fluid for bleeding
• Some bikes may require minor mount adjustment or drilling
• Bleeding the line recommended for optimal performance

How do I check fit and measure before buying?

Measure your bike’s caliper mounting hole center-to-center distance (should be ~2") and verify your handlebar is the left-side 7/8" standard. Also confirm the brake hose length (50 inches) will reach from the rear caliper to the left-hand master cylinder routing on your frame.

• Measure caliper mount: 2" center-to-center bolt spacing
• Confirm handlebar clamp diameter is 7/8" on the left side
• Ensure 50" hose routing fits frame path without sharp bends
• Account for any required bracket modifications ahead of install

This MWMNUN brake caliper kit is aimed at hobbyists and mini-bike owners who need a reliable hydraulic replacement or upgrade for Baja DB30-series 97cc–98cc machines. It suits riders who want firmer braking with less lever effort and are comfortable with light mechanical work like mounting, line routing and bleeding. If you have a different make or a nonstandard brake mounting, check measurements carefully or consult a mechanic before purchase.

FAQ

Q: Is this kit a direct replacement for Baja DB30?

A: Yes, it’s made to directly fit Baja DB30-series 97cc–98cc models, though some frames may need minor mount adjustments.

Q: Does the kit include the brake hose and pads?

A: Yes — a 50-inch hose and two brake pads are included, along with mounting screws, ties and a small wrench.