Prokomon Motorcycle Carburetor Synchronizer Tool — 4-Gauge Vacuum Carb Sync Kit for 2- & 4-Cylinder Bikes, Brass Adapters

Whether you maintain a vintage twin or a modern four-cylinder bike, consistent vacuum across carburetors improves idle quality and throttle response. The Prokomon kit includes four damped gauges, hoses, connectors and brass extensions so you can perform adjustments at the carburetor boots or intake ports without guessing. It’s built for workshop use—sturdy components, field-calibration, and a straightforward hose layout make it practical for home mechanics and professional techs alike.

How does this tool show when carburetors are out of sync?

The four damped vacuum gauges display each cylinder’s intake vacuum in real time, so differences are easy to spot. Needles respond to changes as you adjust throttle or synchronization screws, and the damping helps stabilize readings for accurate comparison.

• Four individual gauges let you compare cylinders simultaneously.
• Damped movement minimizes needle flutter for readable values.
• Calibration slot under each cover allows fine zeroing if needed.
• Brass threaded extensions reach tough-to-access ports.

What comes in the box and how easy is it to set up?

The kit arrives ready for assembly with all hoses, connectors, extensions and a small screwdriver for gauge calibration. Installation requires attaching a hose to each intake port or carburetor vacuum nipple, connecting to the shared manifold or individual gauges, then starting the engine to observe balance.

• Package includes: 4 gauges, 8 vacuum hoses, 4 connectors, 8 brass extensions, screwdriver.
• Hoses and connectors allow both individual and four‑way balancing configurations.
• Threaded brass extensions make secure connections to carb nipples or intake ports.
• Quick-release hoses let you reconfigure gauges without tools.

Can I use the Prokomon synchronizer on different motorcycles?

The kit is compatible with both 2‑cylinder and 4‑cylinder engines and works with a wide range of carburetor layouts. Its variety of hose lengths and threaded adapters makes it adaptable to most vacuum port sizes and positions encountered on street bikes, café racers, and older sportbikes.

• Works on twins and fours—suitable for many vintage and modern carbureted bikes.
• Adapters and extensions handle varied vacuum port threads and depths.
• Gauges can be used singly or combined for cross-balancing routines.
• Durable construction tolerates routine garage use and travel to races.

If you find a needle off zero after unboxing, the gauges include a manual calibration slot beneath each cover; a screwdriver is provided to set the zero position. The damped gauges are precision instruments—adjust carefully to ensure reliable readings.

Who is this for? Home mechanics, motorcycle restorers and professional techs who service carbureted bikes will find the Prokomon synchronizer an efficient diagnostic and tuning aid. It’s designed for people who prefer to diagnose and correct intake imbalances themselves rather than replace parts unnecessarily, and for shops that need a compact, reliable vacuum balancer compatible with many engine types.