New 🛒 Mon Ster Universal Fuel Tank Caps For ATVs & Dirt Bikes 🧨

We offer these universal fuel tank caps for ATVs and dirt bikes in your choice of three sizes. Our 41 mm cap is a perfect solution to a missing fuel cap on a 50cc tank cap on a Baja BA50 or WD50 ATV. It may also be compatible with other sizes of ATV & dirt bike fuel tanks.

The 49 mm Small Grip cap fits several different Baja ATV models, all with the VIN prefix LE8S. To be sure of fitment, please check the compatibility list for those models that we know use this size gas cap.

Big & Bad; the 49 mm Large Grip dirt bike cap has a very wide range of compatibility on a veritable plethora of Chinese and Asian manufactured dirt bikes. This gas cap covers a wide range of engine sizes including 49cc/50cc, 70cc, 90cc, and 125cc/150cc.

If your dirt bike gas cap looks (or looked like this one before you lost it in the mud), and the size listed in the specifications matches, then our 49 mm Large Grip is the dirt bike part for you.

All three of these gas caps may also be compatible with many other Chinese made gas dirt bikes and ATVs, as well as some small 4-stroke engine generators.

When you sell as many off road parts as we do, you begin to notice a few things. It soon becomes obvious that the big well-known brands want way too much for some of their common parts that we can substitute with lower cost items that are just as good. So we do the work for you and offer these fuel tank caps at a savings compared to the name brand items.

⚠ WARNING California Residents: Proposition 65 Warning

41 mm
Outside Diameter (widest point): 64 mm
Inside Threaded Diameter: 41 mm
Top Hose Fitting Outside Diameter: 6 mm

49 mm Small Grip
Outside Diameter (widest point): 71 mm
Inside Threaded Diameter: 49 mm
Top Hose Fitting Outside Diameter: 7 mm

49 mm Large Grip
Outside Diameter (widest point): 90 mm
Inside Threaded Diameter: 49 mm
Top Hose Fitting Outside Diameter: 7 mm