Engine Sprocket
We’ve several rear sprocket possibilities for our clients to “fine tune” their gas operated bicycle to accomplish their desired optimal speed/power gear ratio.
A note to remember: The larger the trunk sprocket, the slower the bike will proceed, but will have power to climb hills. The smaller the trunk sprocket, the quicker the bike will proceed, but will climb hills much less successfully. You are trading power for velocity or vice versa.
You can expect sizes of 36 tooth, 44 tooth, 48 tooth, and 56 tooth sprockets in the Large 9-hole gear. The inner diameter can be 1.4″, hole spacing is 1″. Discover table below for specifications. Commonly, the large 9-hole sprocket with 48 tooth configuration will come with the 4G T-Belt Drive 4-stroke engine kit.
Rear Sprocket (Large 9 Hole) Hole Spacing Internal Diameter Outer Diameter Best Speed Acceleration/Power Included With
36 Tooth 1″ 1 13/32″ 5 7/8″ Fast Low Sold Separately
44 Tooth 1″ 1 13/32″ 7″ Moderate+ Moderate- Sold Separately
48 Tooth 1″ 1 13/32″ 8 1/8″ Moderate- Moderate+ 4G T-Belt
56 Tooth 1″ 1 13/32″ 9″ Slow High Sold Separately
The tiny 9-hole sprockets can be found in two sizes, 44 tooth and 50 tooth. The inner diameter can be 1.39″ and hole spacing is 1″. See desk below for specs. The 
small 9-hole 44 tooth sprocket should come with the SkyHawk Position Fire 2-stroke engine kit.
Rear Sprocket (Small 9 Hole) Hole Spacing Inner Diameter Outer Diameter Top Speed Acceleration/Power Included With
44 Tooth 1″ 1.39″ 7 1/8″ Moderate+ Moderate- SkyHawk Angle Fire
50 Tooth 1″ 1.39″ 8 1/8″ Slower High Sold Separately