We have several rear sprocket possibilities for our customers to “fine tune” their gas operated bicycle to accomplish their desired optimal rate/power gear ratio.
A note to keep in mind: The larger the trunk sprocket, the slower the bike will proceed, but will have capacity to climb hills. Small the trunk sprocket, the quicker the bike will proceed, but will climb hills less successfully. You are trading power for speed or vice versa.
We offer sizes of 36 tooth, 44 tooth, 48 tooth, and 56 tooth sprockets in the Large 9-hole gear. The internal Engine Sprocket china diameter is 1.4″, hole spacing can be 1″. Observe table below for specs. Commonly, the large 9-hole sprocket with 48 tooth configuration should 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″ Sluggish High Sold Separately
The tiny 9-hole sprockets can be found in two sizes, 44 tooth and 50 tooth. The inner diameter is certainly 1.39″ and hole spacing is 1″. See table below for specifications. The small 9-hole 44 tooth sprocket will come with the SkyHawk Position Fire 2-stroke engine kit.
Rear Sprocket (Small 9 Hole) Hole Spacing Internal 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″ Slow High Sold Separately
We also carry 5-hole sprockets in 44 tooth, and 48 tooth sizes. The inner diameter can be 2.5″ and the hole spacing is usually 2″. Outer diameters are 7″ for the 44 tooth and 8″ for the 48 tooth
Back Sprocket (5 Hole) Hole Spacing Inner Diameter Outer Diameter Best Speed Acceleration/Power Included With
44 Tooth 2″ 2.5″ 7″ Moderate+ Moderate- SkyHawk Angle Fire
48 Tooth 2″ 2.5″ 8″ Moderate- Moderate+ Sold Separately
We offer a 6-hole sprocket in 36 tooth, 44 tooth, and 50 tooth sprocket sizes. Inner diameter 1.8″ and hole spacing of just one 1.5″. Outer diameters are 5 7/8″ for the 36 tooth, 7.25″ for the 44 tooth, and 8 1/8″ for the 50 tooth
Rear Sprocket (6 Hole) Hole Spacing Inner Diameter External Diameter Best Speed Acceleration/Power Included With
36 Tooth 1.5″ 1.8″ 5 7/8″ Fast Slow Sold Separately
44 Tooth 1.5″ 1.8″ 7 1/4″ Moderate+ Moderate- Sold Separately
50 Tooth 1.5″ 1.8″ 8 1/8″ Gradual High Sold Separately
We provide a disc brake sprocket that bolts to the brake rotor hub in a 44 tooth sprocket. Internal diameter can be 1.29″ and hole spacing is 1″ with an outer diameter of 7″
Disc Brake Sprocket (9 Hole) Hole Spacing Inner Diameter Outer Diameter Best Speed Acceleration/Power Included With
44 Tooth 1″ 1.29″ 7″ Moderate+ Moderate- Sold Separately
Ever-power Engine Sprocket Shaft
Description for Ever-power Engine Sprocket Shaft
• Pins and shafts are machined from super-tough, aircraft-rated Durabar 60 metal and bearing surfaces are surface to a 16 micron finish
• Deep heat-treating provides 60-63 Rockwell hardness and CNC machined tapers ensure concentricity within .0003″
• 3-hole crank pin design distributes oil similarly to both rod races
• Annealed threads on shafts allow torquing up to 100 ft. pounds. over the OEM specifications
ENGINE SPROCKET, 13T
This sprocket was originally made for the Yerf Dog Spiderbox GX150. It’ll fit the majority of GY6 engines without reverse.
In case you are choosing to eliminate a reverse box instead of replacing it, you may use this sprocket to accomplish away with the whole setup cleanly.