21mm PHBG Scooter Carburetor - Black Edition

21mm Black Edition Carburetor for 70-90cc Scooters and Mopeds

The 21mm Black Edition Carburetor suits 70-90cc scooters and mopeds and offers a dependable way to improve how your vehicle runs. It is a PHBG spigot-style carburetor with connections for oil and vacuum, plus a manual choke. Browse our carburetors and jets for scooters to find more options. This unit can noticeably sharpen engine operation and throttle response, so it is a sound pick for a repair or an upgrade.

Construction and Design

The body is cast from aluminum, which keeps the weight down while still holding up well. It comes with a 90 main jet that has an M5x.80 thread and a 45 idle jet, both chosen to manage fuel flow and keep performance consistent. For the air filter, you can use a 32mm connection without an adapter or a 38mm connection with one, so you have more than one way to mount it.

Installation and Compatibility

This 21mm Black Edition is designed as a universal fit across many makes and models, so it works for a wide range of scooter owners. The intake connection measures 25mm, which keeps setup straightforward. Riders often swap in a new carburetor when they notice performance problems or when they want to tune for better efficiency.

Specifications

• Material: Aluminum
• Main Jet: 90 (M5x.80 Thread Size)
• Idle Jet: 45
• Air Filter Connection (w/o adapter): 32mm
• Air Filter Connection (w/ adapter): 38mm
• Intake Connection: 25mm
• Color: Black
• Fits: Universal 21mm PHBG spigot carburetor for 70-90cc scooters and mopeds (manual choke)

Fitment

How to choose: Check that the intake spigot matches your engine's intake manifold. This carb has a 25mm intake connection, and the air filter requires either a 32mm connection or a 38mm connection when the adapter is used.

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