Honda CT90 / Trail 90 Specs

Manufacturer: Honda
Engine: 89.5 cc (5.46 cu in) OHC air-cooled single cylinder engine
Bore / Stroke: 50.0 x 45.6 mm (1.970 x 1.797 in.)
Compression Ratio: 8.2 : 1
Top Speed: 55 mph (89 km/h)
Power: 7.0 PS @ 8,500 RPM
Torque: 0.69 kg·m @ 5000 RPM (4.991 lb·ft @ 6000 RPM)
Transmission: 4-speed constant mesh with an auxiliary high / low selector
Suspension
- Front: Telescopic fork (bottom link type on early CT90 K0 models)
- Rear: Swing arm
Brakes
- Front: Drum
- Rear: Drum (CT90 K0 - K5 right foot pedal and left hand lever operated)
Tires
- Front: 2.75" x 17" (2.50" x 17" Early CT90 K0)
- Rear: 2.75" x 17"
Wheelbase:
- Early CT90 K0: 1,188 mm (46.81 in)
- Late CT90 K0 - K1: 1,215 mm (47.9 in)
- CT90 K2 - CT90 1979: 1,220 mm (48.0 in)
Dimensions
- Early CT90 K0
  - L: 1,800 mm (70.92 in)
  - W: 650 mm (25.61 in)
- Late CT90 K0 - K1
  - L: 1,870 mm (73.6 in)
  - W: 680 mm (26.8 in)
- CT90 K2 - K7
  - L: 1,870 mm (73.6 in)
  - W: 695 mm (27.4 in)
- CT90 ('77) - CT90 ('79)
  - L: 1,870 mm (73.6 in)
  - W: 740 mm (29.1 in)
Weight
- Dry: 198.5 lbs (90 kg) (Early CT90 K0: 179.3 lbs (81.5 kg))
- Wet: 202.8 lbs (92 kg)
Fuel Capacity:
- Main tank: 1.4 U.S. gal. (5.5 lit.)
- Reserve capacity: 0.2 U.S. gal. (0.8 lit.)
- Auxiliary Fuel Tank Capacity (if present): 0.6 U.S. gal. (2.3 lit.)
Oil Capacity: 0.95 U.S. qt. (0.9 lit.)