Genuine/GY6 Crankcase Decompression Kit

Crankcase Decompression Kit for Genuine Buddy and GY6 Engines

This Crankcase Decompression Kit is designed for Genuine Buddy scooters and GY6-based engines. It replaces the original dipstick with an efficient breather system that promotes better airflow. This part is one of the GY6 scooter parts that improves engine performance by allowing the piston to move with less resistance, leading to a more responsive throttle and reduced risk of oil leaks.

Performance Benefits

By releasing trapped gases from the crankcase, this kit lowers air density, resulting in measurable power gains. The decreased pressure reduces parasitic drag on the crankshaft, allowing for smoother engine revving. This upgrade is particularly beneficial for off-road and high-WOT applications, as it helps protect against blown seals and gasket leaks.

Quality Components

The kit includes a 27-inch oil and fuel-resistant tubing with a 12mm inner diameter and 18mm outer diameter, providing flexible routing options. The anodized CNC billet aluminum cap features an 18mm thread and adds a polished look to your engine compartment. The complete package comes with durable hose clamps and fasteners for secure installation.

Specifications

• Material: Anodized billet aluminum
• Size: 27" tubing
• Tube ID/OD: 12mm / 18mm
• OEM Part Number: 633U02H
• Thread Size: 18mm

Fitment

This kit is compatible with various models from Genuine Scooter Co. and GY6 engines.

• Genuine Scooter Co.: Buddy 125, Buddy 150, Buddy 170i, Hooligan, Blur
• GY6 50cc: 139QMA, 139QMB, 1P39QMB, 147QMD
• GY6 150cc: 157QMJ, 152QMI, 161QMK, 1P61QMK
• Other Brands: TaoTao, Wolf, Icebear, Bintelli, SYM, KYMCO

Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.

Shop more: GY6 Scooter Parts · Chinese Scooter Parts · Scooter Engines & Engine Parts · Scooter Parts