Chinese 80cc Chain
Chinese 70cc Chain
Chinese 60cc Chain
Chinese 55cc Chain
Chinese 49cc Chain
Chinese 48cc Chain
Honda Cub-F 50cc Chain
Honda GX25 25cc Friction
Honda GXH50 49.3cc Friction
Russian D series Chain
GEBE R/S 35cc
GEBE R/S 25cc
GEBE Tanaka 26cc
GEBE Tanaka 32cc
GEBE Tanaka 40cc
GEBE Komatsu Zenoah 25.4cc
FBE R/S 35cc Friction
FBE Tanaka 40cc Friction
Tanaka 23cc~ Friction (Bike Bug, Sears Free Spirit, Montgomery Wards Lil' Devil)
Zipper 49cc~ (Tecumseh) Friction
Island Hopper 49cc~ (Tecumseh) Friction
Island Hopper 31cc~ (Honda GX31) friction
Island Hopper 48cc, 35cc and 25cc~ (Bridgestone) Friction
Dimension Edge 49cc~ (Tecumseh)discontinued
Dimension Edge 49.3cc~ (Honda GXH50) Friction
Dimension Edge 42.7cc~ (Mitsubishi TLE43)clutched or direct drive friction
Dimension Edge 33.5cc~ (Robin/Subaru EHO35)clutched or direct drive friction
Staton Inc. Tanaka 40cc and 47cc~ Friction, Geared/Chain drive
Staton Inc. Honda 49.3cc, 35.8cc and 25cc~ Friction, Geared/Chain drive
Staton Inc. Honda ~ Friction
Staton Inc. Mitsubishi 42.7cc, 33cc and 22.6 ~ Friction, Geared/Chain drive
Staton Inc. Robin/Subaru 33.5cc and 24.5cc~ Friction, Geared/Chain drive
Whizzer~ 148cc flathead 4-stroke Belt drive
Fox~ Friction
Chicken Power~ Friction
Monark Super twin Twin Cylinder~ Belt
Jack and Heinz Twin Cylinder~ Belt
American Chain Drive 48cc~ (Yotchi) Geared/chain
American Chain Drive 48cc and 35cc~ (bridgestone) Geared/chain
There is still more companies I know but i cant think of what engines they use or the correct names of companies for that matter, but i may update