This Chinese fuel petcock replaces the gas shut off valve for many 4-stroke Chinese  ATVs, Dirt Bikes, & Go Karts. This valve fits 50cc, 70cc, 90cc, 100cc, 110cc, 150cc models.  

Petcock description:

• Overall length: 63mm [2.48"]
• Nipple OD: 6.65mm [.26"]
• Nipple ID: 3.75mm [.15"]
• 2 position
• Compatible with 50cc-250cc