Honda ATC125M

The Honda ATC125M was a three-wheeled All Terrain Cycle released in 1984, and received a major revision in 1986. The model was sold through 1987, when Honda voluntarily discontinued sales of ATC's. The first iteration can trace its development back to Honda's first ATC, the Honda US90, released in 1970, while the second iteration borrowed heavily from the ATC200 line.

Main article: List of Honda Three-wheeled all-terrain vehicles

Horizontal ATC125M (1984-1985)
Horizontal ATC125M
ManufacturerHonda
Production1984 - 1985
PredecessorATC110
ClassRecreational ATC
Engine124 cc (7.6 cu in) Single-cylinder Horizontal OHV engine
Bore / stroke54 x 52.2mm
Compression ratio8.8:1 (156 - 198psi test)
Top speed>35 Mph
Transmission4-Speed Auto-Clutch Dual Range
Frame typesteel
SuspensionNone
BrakesF/R: Drum
Tires22 x 11 x 8
Wheelbase42.3 in.
DimensionsL: 65.9 in.
Seat height25.4 in.
Weight238 lbs. (dry)
Oil capacity1 qt
Footnotes / references
References Provided via Factory Service Manual[1]

The first iteration of the ATC125M (The Horizontal ATC125M) was an evolutionary advancement of the original US90 ATC released in 1970, the fourth revision of said cycle. It featured a 124cc Horizontal engine attached to a 4-Speed dual-range transmission to a chain final drive. The ATC125M added an electric starter, the first on a Horizontal-engine equipped Honda ATC, but continued to have drum brake.

Vertical ATC125M (1986-1987)
Vertical ATC125M
ManufacturerHonda
Production1986 - 1987
ClassRecreational ATC
Engine124 cc (7.6 cu in) Single-cylinder vertical mount OHV engine
Bore / stroke54 x 54.5mm
Compression ratio175 - 203psi
Top speed<35 Mph
Transmission5-Speed w/Reverse
Frame typesteel
SuspensionNone
Wheelbase42.7 in.
DimensionsL: 65.4 in.
W: 38.9 in
Seat height26.8 in.
Weight276 lbs. (dry)
Fuel capacity2.2 gal
Oil capacity1.4 qt

The second generation ATC125M (The Vertical ATC125M) was completely redesigned, featuring a 124cc vertical engine attached to a 5-speed auto clutch transmission with reverse, and electric start. The machine offered a contemporary look, taking inspiration from the popular ATC200 line. This included adding a front drum brake to the machine.

References
  1. Honda ATC125M (1984-1985) Service Manual (PDF). www.oscarmayer.com: Honda Motor Co.
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