ProBld Buggy 172cc Competition Kit

The Details ⚙️

Want to wake up your GY6 buggy with real, noticeable power? This 171cc Competition Kit nearly doubles your horsepower compared to stock.

A factory QMJ157 150cc engine makes around 7.5 HP. This setup pushes close to 13 HP, giving you significantly stronger acceleration, better pulling power, and a much more responsive ride.

Available in two configurations:

• 🔥 Carbureted Setup — simple, proven, and easy to service
• ⚡ EFI Setup — auto-tuning fuel system with smoother operation and zero rejetting

A serious performance jump without piecing together a full build 🔧🔥

Carb vs EFI — Which Should You Choose? 🤔

• 🔥 Carb: Lower cost, easy to work on, but requires tuning based on conditions
• ⚡ EFI: Self-adjusting fueling, smoother performance, and no carb tuning required

Carb = simple. EFI = convenience + consistency 💨

What's Included 📦

Core components:

• 🧠 61mm Big Valve Cylinder Head
• 🔥 171cc High Compression Big Bore Kit
• ⚙️ Performance Camshaft
• 🌀 ProBld Variator Kit
• 🧵 Kevlar CVT Belt
• ⚡ High Torque Starter
• 🧲 Billet + Titanium drain plugs
• 🛢️ High volume oil pump
• 🔩 Starter clutch + tools
• ⚙️ Zen CVT transmission kit
• 🔧 Gaskets, bearings, and supporting hardware

Fuel system differences:

• 🔥 Carb version includes: 28mm PWK carb kit (intake, cable, jets, filter)
• ⚡ EFI version includes: Full auto-tune EFI kit + stator upgrade

Everything you need for a high-performance buggy setup in one package.

Important Things to Note 🚨

• ONLY fits QMJ157 buggy engines with gears (neutral, reverse, drive).
• Will NOT fit standard scooter engines or non-geared setups.
• Compatibility must be confirmed before ordering.
• Final tuning and setup required after installation.

Not sure if this fits your buggy? Message us — we’ll help you confirm 👍