ep

January 15, 2020

Engine Sprocket
We have several rear sprocket possibilities for our clients to “fine tune” their gas operated bicycle to achieve their desired optimal quickness/power gear ratio.
A note to keep in mind: The larger the trunk sprocket, the slower the bike will move, but will have capacity to climb hills. Small the rear sprocket, the quicker the bike will go, but will climb hills much less efficiently. You are trading power for swiftness 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 internal diameter can be 1.4″, hole spacing is 1″. Discover table below for specifications. 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 Engine Sprocket china 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 internal diameter is 1.39″ and hole spacing is 1″. See desk below for specs. The tiny 9-hole 44 tooth sprocket will come with the SkyHawk Position Fire 2-stroke engine kit.

Rear Sprocket (Small 9 Hole) Hole Spacing Inner Diameter Outer Diameter Best 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″ Gradual 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 definitely 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 provide a 6-hole sprocket in 36 tooth, 44 tooth, and 50 tooth sprocket sizes. Internal diameter 1.8″ and hole spacing of 1 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

Back Sprocket (6 Hole) Hole Spacing Inner Diameter Outer 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″ Sluggish High Sold Separately

We offer a disc brake sprocket that bolts to the brake rotor hub in a 44 tooth sprocket. Inner diameter is definitely 1.29″ and hole spacing is 1″ with an external 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
Description for Ever-power Engine Sprocket Shaft
• Pins and shafts are machined from super-difficult, aircraft-rated Durabar 60 steel and bearing areas are surface to a 16 micron finish
• Deep heat-treating provides 60-63 Rockwell hardness and CNC machined tapers assure concentricity within .0003″
• 3-hole crank pin design distributes oil equally 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 designed for the Yerf Dog Spiderbox GX150. It will fit the majority of GY6 engines without invert.
If you are choosing to eliminate a reverse box instead of replacing it, you can use this sprocket to do away with the whole setup cleanly.