GY6 125cc-150cc Valve Keeper Set (4-Piece Kit) by Blue Line

GY6 125cc-150cc Valve Keeper Set

Ensure the structural integrity of your valvetrain with the Blue Line Valve Keeper Set. These precision-hardened valve cotters (also known as keepers or collets) are critical components that lock the valve spring retainer to the valve stem. Designed to meet OEM specifications for the GY6 125cc and 150cc engine families, this 4-piece set provides the high-tension grip required to prevent valve drops and catastrophic engine failure during high-RPM operation.

Technical Performance Features

• Precision Hardened Steel: Manufactured from high-tensile alloy steel to resist wear and prevent "mushrooming" under constant spring pressure.
• Exact Taper Fit: Engineered with the factory-correct taper angle to ensure a perfect mechanical lock between the valve stem and the spring retainer.
• Complete Engine Set: Includes 4 keepers—enough to fully service both the intake and exhaust valves on a standard 2-valve GY6 cylinder head.
• Professional Grade: A reliable replacement for original equipment (OEM) parts, providing peace of mind for both stock repairs and performance builds.

Comprehensive Fitment Guide

This set is compatible with 125cc, 150cc, and 161cc 4-stroke GY6 engines (152QMI / 157QMJ / 161QMK) commonly found in:

Technical Specifications

• Quantity: 4 Keepers (2 Pairs)
• Compatibility: 2-Valve Cylinder Heads
• Material: Hardened Alloy Steel
• Application: Intake & Exhaust Valve Stems

Mechanic's Note: Valve keepers are tiny and under immense spring pressure—they are easily lost during disassembly!

Installation Tip: Use a dab of Assembly Lube or grease to "stick" the keepers to the valve stem during installation; this prevents them from falling out before you release the valve spring compressor.

Pro Tip: Always inspect your Valve Stem Seals while you have the springs off—it’s the best time to replace them to prevent oil consumption!

SKU: 151-111 / 164-172
Vendor: Scooterworks USA, LLC

Original Parts For Scooters SKU 151-111, 164-172

Brands: Amstar, Amigo, Ascend, Baotian, Bashan, Blade, Boom, Chicago Scooter Company, Dongfang, Roketa, Baotian, Bashan, BMS, Cool Sports, E Ton, Fly Wing, Eagle, Fly, Italica, Riya, Ice Bear, Jackel, Jet Moto, JCL, Taotao, Peace, JM Star, Jonway, Kazuma, Keeway, KMD, Kymco, Lance, Lifan, Linhai, Loncin, Longbo, Fuxin, Jiajue, Tao Tao, Tao Motors, Trailmaster, Maxtrade, Meitien, Motofino, Motorino, NST, Panterra, Panther, Qlink, Yiben, Red Streak, Redcat, Roketa, Schwinn, Strada, SYM, Tank, Terminator ,Tomberlin, TNG, United Motors, Vento, Vitacci, Wildfire, Wolf, X-Treme, X-Pro, Yongfu, ZNEN, Zhongneng , Zhilong, Geely, Wangye, ZH and more Manufactured by: Taizhou Zhongneng Motorcycle Co.; Jiangsu Zhongneng Motorcycle Co.; Jiangsu Meijunte Technology Co.; Taizhou Qianxin Vehicle Co.; Ningbo Dongfang Lingyun Vehicle Made Co.; Taizhou Zhilong Technology Co.; Zhejiang Jiajue Motorcycle Manufacturing Co.; Zhejiang Gelly Ming Industrial Co.; Taizhou City Senglong Motorcycle Manufacture Co.; Jiangsu Sacin Motorcycle Co.; Jiangsu Linhai Power Machinery Group Co.; Zheijiang TaoTao Vehicles Co.; Zhejiang Senling Motorcycle Co.; Sanmen County Yongfu Machine Co; Taizhou Jiaojiang Zhiwei Motorcycle Manufacture Co.; Huzhou Daixi Zhenhua Technology Trade Co.; Taizhou Zhongneng Motorcycle Co.; Zhejiang Riya Motorcycle Co.; Ningbo Longjia Motorcycle Co.; Taizhou Zhongneng Motorcycle Co.; and more