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

Manufacturer	Honda
Production	1984 - 1985
Predecessor	ATC110
Class	Recreational ATC
Engine	124 cc (7.6 cu in) Single-cylinder Horizontal OHV engine
Bore / stroke	54 x 52.2mm
Compression ratio	8.8:1 (156 - 198psi test)
Top speed	<43 Mph
Transmission	4-Speed Auto-Clutch Dual Range
Frame type	steel
Suspension	None
Brakes	F/R: Drum
Tires	22 x 11 x 8
Wheelbase	42.3 in.
Dimensions	L: 65.9 in.
Seat height	25.4 in.
Weight	238 lbs. (dry)
Oil capacity	1 qt
Footnotes / references References Provided via Factory Service Manual

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

Manufacturer	Honda
Production	1986 - 1987
Class	Recreational ATC
Engine	124 cc (7.6 cu in) Single-cylinder vertical mount OHV engine
Bore / stroke	54 x 54.5mm
Compression ratio	175 - 203psi
Top speed	<35 Mph
Transmission	5-Speed w/Reverse
Frame type	steel
Suspension	None
Wheelbase	42.7 in.
Dimensions	L: 65.4 in. W: 38.9 in
Seat height	26.8 in.
Weight	276 lbs. (dry)
Fuel capacity	2.2 gal
Oil capacity	1.4 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.