JMCHstore Performance Carburetor with Replaceable Main Jet — Fits Monster Mega Moto MM80/MMB105, Coleman B100, Motovox MBX10, Baja DB30, Phatmoto 79cc

Precision fueling for mini bikes that demand control

The JMCHstore Performance Carburetor with a replaceable main jet is engineered for a wide range of compact engines. It fits popular models such as Monster Mega Moto MM80 and MMB105, Coleman B100/RB100 105cc, Motovox MBX10, Baja DB30 97cc, Phatmoto 79cc, and other similar small-displacement bikes. The design preserves the familiar factory look while upgrading the fuel path for more tunable performance.

Key features invite tuning flexibility without complicating installation. A replaceable main jet supports adjusted fuel mixtures as airflow demands change, while the included air filter breather helps manage venting when the stock air box is removed. The horizontal fuel outlet simplifies hose connections and helps maintain steady fuel flow in tight engine bays.

Core benefits you might notice

• Replaceable main jet for dialing in mixtures as airflow changes occur, supporting smooth power delivery.
• Rich main jet paired with a larger low-speed jet to support broader airflow ranges and better idle behavior.
• New idle speed screw and spring to help stabilize idle, even during transitions between warm-up and ride.
• Air filter breather option to simplify vent routing when removing the stock air box, reducing venting complications.
• Horizontal fuel outlet for easier installation, reduced hose strain, and reliable fuel flow.
• Factory-minded design that stays compatible with OEM layouts while offering upgrade potential.

What’s in the box

• 1 x New Carburetor
• 1 x Rich main jet
• 1 x Large low-speed jet
• 1 x Fuel filter
• 3 x Gaskets
• 1 x Fuel line
• 2 x Hose clamps

Real-world use cases

Consider upgrading to this carburetor when you’re exploring higher airflow or adjusting for a tuned exhaust setup. If you remove the stock air box or install a straight pipe, the larger low-speed jet can help maintain steady idling. The combination of a replaceable main jet and precise idle components offers practical tuning options for riders seeking a balanced, responsive throttle without swapping major engine hardware.

Compatibility snapshot

• Monster Mega Moto MM80 / MMB105 mini bikes
• Coleman B100 / RB100 105cc models
• Motovox MBX series (MBX10, MBX11, MBX12)
• Baja DB30 97cc and related small-displacement bikes
• Phatmoto gas bikes (79cc)
• Chinese Lifan 152-3 / similar 105cc mini bikes