News Releases 1998
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MotorcycleJapanMarch 20, 1998
Honda Announces Full Model Upgrade of Tact Scooter Series that Complies with New Japanese Motorcycle Emission Regulations

Tokyo, March 20, 1998 --- Honda Motor Co., Ltd. has announced the launch in Japan, on April 17, of the fully upgraded Honda Tact series of scooters. With their host of convenient features and combination of power with a smooth ride, the Tact series, which includes the Tact and Tact Stand-up models, has long proved popular with consumers of all ages. The new series has been modified to comply with the impending new Japanese motorcycle exhaust emission regulations.

When the Tact series first went on sale in September 1980 it caused a sensation in Japan, leading to a surge in the popularity of motor scooters. The Tact Fullmark, launched in January 1987, one of the first scooters in Japan to have built-in helmet storage space beneath the seat, established itself quickly to define a whole new segment within the Japanese motorcycle market.

The changes made for the new model upgrade include a restyling of the exterior, together with a number of modifications designed to comply with the new Japanese motorcycle exhaust emission and noise pollution regulations. The Honda Lead series of scooters has been similarly modified to make them more environment-friendly.

In addition to its elegantly fluid lines, the new Tact series features a convenient front-rear combination brake. The Tact Stand-up has an improved stand that makes it much easier to use.

The manufacturer's recommended retail prices of the Tact series have been kept at the same levels as the old models.

Honda Tact
Honda Tact

Domestic annual sales target: 30,000 units

Main Features of the Tact series

Environment-friendly 2-stroke engine complies fully with impending Japanese motorcycle exhaust emission regulations

In common with the Lead scooter series, the Tact series features an air-cooled 2-stroke single-cylinder engine with carburetor modified to allow a lean air-fuel mixture, thereby increasing combustion efficiency and reducing the amount of pollutants generated during the combustion process. In addition, a new kind of oxidizing catalyst unit (or catalyzer) has been fitted inside the muffler. These modifications cut the amount of pollutant gases in the exhaust by a substantial degree - reducing carbon monoxide (CO), nitrogen oxide (NOx) and hydrocarbon (HC) emissions by more than half. The Tact series complies fully with the Japanese exhaust emission regulations for new Class I motorcycles (50cc or less) due to come into force from October 1998. The changes in the internal construction of the muffler also help the Tact series comply with the Japanese noise pollution regulations for new motorcycles due to come into effect at the same time. Furthermore, after the engine has warmed up, the new modifications reduce emissions of white smoke, compared to current Honda models, by more than 90%, (values are taken from Honda-conducted light permeation tests on Honda products).

Classy feel, plus a more comfortable riding position

The new Tact series design consists of restrained, smooth flowing lines, the whole form conveying a distinct feel of class. A long seat and a wide, flat floorboard give the rider a lot more freedom in terms of body position.

Other features

  • Combined brake system linking the front and rear brakes, which have proved so popular with the Dio and Lead series, have been added as standard for enhanced security and easier handling.
  • A central stand/lock-in construction and a strengthened combination and lock switch to deter thieves.
  • The fuel tank capacities of both models have been increased to 6 liters (from 5 liters in the case of the Tact and 4.5 liters in the case of the Tact Stand-up), meaning less frequent fill-ups.

Automatic stand with the Tact Stand-up

In March 1989, the Tact became the first scooter in the world to be fitted with an automatic stand. This feature makes it much easier to park without having to manhandle a heavy vehicle - a real boon for older people. In the new Stand-up model, the switch that activates the stand has been moved from being part of the main switch to a more convenient position on the side of one of the handlebar grips. If the rider tries to ride off without the stand being safely raised, the engine automatically cuts out, further enhancing safety.

The color of the bodywork comes in several two-tone color combinations to suit all tastes:


  • Pearl Milky White with Cosmetic Red Metallic
  • Pearl Blue with Mars Dune Beige Metallic

Tact Stand-up:
  • Pearl Milky White with Cosmetic Red Metallic

Main specifications:

Model Tact
Type Honda BB-AF51
Length x width x height (m) 1.665x0.625x1.020
Wheelbase (m) 1.170
Ground clearance (m) 0.105 (0.095)
Seat height (m) 0.695
Curb weight/
dry weight
(kg) 73/67 (76/70)
No. of riders (person) 1
Fuel economy(km/l)
[30 km/h test on flat ground]
Minimum turning radius (m) 1.8
Engine type AF24E
(air-cooled 2-cycle single-cylinder)
Displacement (cm3) 49
Bore/stroke (mm) 39.0x41.4
Compression ratio 6.8
Maximum power output (PS/rpm) 5.2/6,500
Maximum torque (kgm/rpm) 0.59/6,000
Carburetor type APBB3
Starter self-starter
(combined with kick-start)
Ignition Capacitor discharge (CDI)
Lubrication separated lubrication-type
Oil capacity (l) 1.15
Fuel tank capacity (l) 6.0
Clutch dry multi-plate
Transmission freely variable (V-matic)
Gear ratios (one-speed) 1st gear 2.450 ~ 0.880
Rake (degrees)/trail (mm) 27o00' /74
Tire sizes Front 3.00-10 42J
Rear 3.00-10 42J
Brakes Front hydraulic disc
Rear drum
Suspension Front bottom link
Rear unit swingarm
Frame type underbone

(Figures in parenthesis are for the Tact Stand-up).
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