Warning: All foam filters require filter oil to do their job. I highly recommend PJ1 filter oil or another quality brand. Engine oil will work but it runs off and makes a mess and eventually your filter will start letting dirt into your engine. Clean your filter with dish soap and warm water, (never use gas, it can damage the foam). I have over 14K miles on my GY6 50 and never even adjusted the valves! Take good care of your motor and it'll take good care of you....
Partial List of Makes & Models that use this engine:
Baccio SPD 50cc
Baotian: 50QT-11, Dotera 50QT-9, 50QT-11, Jalon JL50QT-18, BT49QT, BT50QT-9, Ecobike
BENZHOU YY50QT: City Star 50, BUFFALO, Wind ERING, Sprint 50, JIN LUN, JL50QT KARCHER KM 50
Baja Powersports: Baja SC50, Sun City, Primo (PEP BOYS made by Zongshen)
Falcon: JL50QT-15, JL50QT-16
Fly Scooters:
Icebear: Maddog 50cc
Jmstare: Accipiter 50, breeze 50, eagle 50
Kreidler: Flory 50
Kymco: Agility, MMC 50, Filly 50, Vitality 50, Nexxon 50, People, Super 8, Vivality, New Dink, Yager,
Linhai:
MSK: Ecobike 50
Pantera: Freedom, Fusion and Retro
Metropolis, Viva City, Big Max, Comet Star & Star 11, PMX, V-CLick
QUINGQI: QM50QT-6A, koala qm50qt-6d
REX: Capriolo 50, Flory, RS 450, RS 500, Off Limit 45
RIEJU: Paseo 50, Toreo 50
Roketa: Bahama, Maui, Sicily, Gamax Spillo
Sachs: 49er 50, Bee SANILI TS50QT-4
Sinski: XSJ50QT-6, Sinski XSJ50QT-B
Shanghai Shenke: EVO 50cc
Strada: RX 50 (4 stroke) Powersports Factory, Jalon JL50QT-21
Sunl: SL50QT-16, SL50QT-16, SL50QT-18, SL50QT-2, SL50QT-3
TaoTao: GT5, Fastwind, atm50-a1, cy50-a, cy50-b, cy50-t3, funny 50, Roman 50, Retro 50, Speedy 50, Venus 50
Taishan: Commuter, Zhong Hu
Tank: Sports
United Motors: Longbo,
Velocity: 50, 49cc
Vento:
Verucci: VC50TS-3M
VIP: Future Champion
XINLING ZHONG: YU 50 QT-5 ZHONG YU 50 QT-7 ZHONG YU ZY 50QT
Zongshen: Metro 50cc, Wind 25/50, ZS50QT-4 50, Baron 50
Many more..... this list is continually growing....