Honda H100A / H100S / H100S II

From Wikipedia:

The Honda H100S is a two-stroke motorcycle introduced in June 1983, alongside the original Honda H100-A, which was released to the UK in February 1980. The H100-A was built for fulfilling the role of an economical, practical, lightweight commuter machine. It was designed for riders who preferred the simplicity of the two-stroke engine. In Honda style, equipment such as a fully enclosed chain, capacitor discharge electronic ignition (CDI), and a separate oil injection system allowed easy operation of the motorcycle with the minimum of maintenance and attention. The lowly-tuned engine gives adequate performance for use in normal traffic conditions, but does not consume high amounts of fuel. Under normal operating conditions, mileage to the gallon figures regularly exceed 80, often close to 100, impressive for a two-stroke and not far off Honda's own four-stroke commuting machines. The engine uses a reed-valve induction system, and the vibration inherent in single cylinder engines is largely cancelled out by the single shaft primary balancer.

The H100-S was introduced alongside the H100-A which continued in production until stocks were exhausted. The H100-S is a heavily revised version of the original, losing some of its more practical features as a result. This was felt necessary to give it a wider appeal. The oil tank was moved from being part of the fuel tank to behind the right hand side panel, the final drive chain casing was relieved for a sleeker, chrome plated top cover, the clocks were made separate from the headlight to allow for a new tachometer, and, strangely, the CDI ignition system was replaced by a contact breaker system (points).

March 1986 saw a largely cosmetic reworking of the H100-S, to form the H100-SII. This model received bolted-on frame down tubes which gave the appearance of a conventional cradle-frame motorcycle. The ignition system was reverted to CDI, and all other changes were in terms of paint and graphics.

From a Honda Brochure on the H100S II:
Updated and revised for 1986 the new H100S II is now better then ever.

The Honda H100S II have proved itself many times over to be a terrific sporting bike, offering good performance with plenty of value for money.

The air-cooled 2-stroke engine produces a healthy 11 PS at 6000 rpm to give the H100S II a truly nippy turn of speed. The 99cc engine is also incredibly smooth thanks to the primary balancer, which reduces vibration. To reduce waste and exhaust smoke, the oil pump output has been set to match the throttle opening. And to give you a gear for every situation, the H100S II has a 5-speed gearbox.
For 1986 the H100S II now features a new sports style frame with twin down tubes together with some resplendent new paintwork in red or black.

A sturdy lightweight sports machine, the H100S II is a delight to ride out on the open road. Predictable handling is provided by the hydraulic front forks and twin hydraulic rear dampers, while assured braking is by the dependable drums fitted front and rear.

A dual seat, a passenger safety rail, easy-to-read instrumentations in a neat centre console, a locking side cover with oil level sight and handily positioned lights, indicator and horn controls all combine to make the H100S II a highly practical and desirable machine.