Flying Horse 2-Stroke/4-Stroke Motorized Bicycle Engine 3.5L Gas Tank &ndash; Gas Bike Tank Upgrade (3.5L Black) The 3.5 L Gas Tank is made for 2-stroke and 4-stroke gasoline powered motorized bicycles across the board- any size, any displacement This tank fits on standard bicycle frames of 1-1/2 in diameter. With upgraded tank mounts and slight modification you can fit this tank on an oval-shaped tube or frames with tubes up to 1-3/4 Mounting and installation is simple: set the tank on your frame, fit mounting brackets to the mounting studs, and fasten. Install your fuel valve and fuel line to your engines carburetor and fill with gas Gloss Black finish; holds up to 3.5 Ls (about 1 gal). NOTE: Gas Tank does not include mounting brackets