ProBld Buggy 172cc Competition Drop In Crate Engine

Need a drop-in power boost for your buggy? We’ve got you covered!

The stock QMJ157 150cc engine puts out around 7.5 horsepower, but our upgraded motor delivers nearly 13 horsepower—almost double the power! This is our 171cc Buggy Drop in Crate Motor.

This engine upgrade includes:

• A brand-new 172cc top end made in Taiwan (not China), featuring a larger valve and ported head for better airflow and performance.
• A high-volume oil pump to keep things running cool and well-lubricated.
  (We strongly recommend adding an oil cooler—not included in this kit.)
• A high-torque starter and starter clutch for improved reliability.
• Our performance-tuned ZEN CVT transmission kit to replace the factory setup, keeping your buggy in the sweet spot throughout the entire RPM range.
• A fuel system upgrade with your choice of:
• A 28mm PWK carburetor, or
• A fully auto-tuned EFI kit.
  (If you opt for EFI, we also include an 8-pole to 11-pole charging system upgrade to ensure your EFI system stays powered.)

⚠️ IMPORTANT FITMENT NOTICE
Before ordering, you must confirm your current engine is a QMJ157 model with gears (Neutral, Reverse, and Drive). This upgraded engine will not fit other setups. Be sure to verify compatibility before purchasing.

Carbureted Version Comes with:

• GY6 QMJ157 61mm Performance Big Valve Cylinder Head
• High Compression/High Altitude GY6 171cc/172cc Scooter Big Bore Kit
• 28mm PWK carb kit with intake, cable, jets and filter
• GY6 Performance Camshaft
• Reveno GY6 QMJ157 Contra Spring 
• ProBld GY6 Variator Kit 
• Titanium Nut and Washer - for Variator
• GY6 150cc Short Case Belt 
• GY6 High Torque Starter 
• GY6 Crank Case Gasket 
• Zen CVT transmission kit
• Billet Oil filter drain plug 
• Titanium oil drain plugs x2
• GY6 High Volume Oil Pump 
• High Performance Starter Clutch 
• GY6 Starter Clutch Socket Tool
• Magnito Flywheel Puller Tool
• Sealed Contra Spring Bearing -ProBld
• New complete bottom end engine

EFI Version Comes with:

• GY6 QMJ157 61mm Performance Big Valve Cylinder Head
• High Compression/High Altitude GY6 171cc/172cc Scooter Big Bore Kit
• 28mm PWK carb kit with intake, cable, jets and filter
• GY6 Performance Camshaft
• Reveno GY6 QMJ157 Contra Spring 
• ProBld GY6 Variator Kit 
• Titanium Nut and Washer - for Variator
• GY6 150cc Short Case Belt 
• GY6 High Torque Starter 
• GY6 Crank Case Gasket 
• Zen CVT transmission kit
• Billet Oil filter drain plug 
• Titanium oil drain plugs x2
• GY6 High Volume Oil Pump 
• High Performance Starter Clutch 
• GY6 Starter Clutch Socket Tool
• Magnito Flywheel Puller Tool
• Sealed Contra Spring Bearing -ProBld
• 171cc Full Auto Tune EFI kit
• 8 poll to 11 poll stator upgrade kit
• New complete bottom end engine

Does not inlcude a EFI clocking flange. Depending on your model you may need one.