1989 Yamaha Other on 2040-motos

The Yamaha TZR250 is a motorcycle manufactured and produced by the Japanese motorcycle manufacturer Yamaha between 1986 and 1996.

Yamaha produced the road going two-stroke motorcycle, loosely based on the TZ250 Yamaha racing bike. Parallel-twin, reverse cylinder and finally V-twin variants were produced. It evolved as a natural replacement for the popular RD250/RD350 series of the 1980s. It has the Yamaha Power Valve System (YPVS) which raises and lowers the exhaust port depending on the rpm of the engine. The YPVS servo motor starts to open at about 6,000rpm. In standard form 50 bhp is claimed at 10,000rpm. Although mid 40s is more realistic, and will not rev much above 9,500rpm in standard trim, owing to the restrictive standard exhausts and ignition boxes.

Still raced in the Yamaha pasta masters race series with the British racing club - BMCRC. Racing engines currently claiming circa 56 bhp @ 11,000rpm. Racing fuel ratios typically 1:30. Standard exhausts are difficult to improve on in terms of power and torque, but they are very large and impede ground clearance. Jolly Moto exhausts are popular replacements as they are lighter, produce similar performance, allow better ground clearance.

An F3 racing kit was produced for a few years which included ignition boxes, carbs and exh, helping increase maximum revs, power and torque.

Production started in June 1986. At a cost of around $6,000 new on release it was seen as an expensive bike for a 250 cc, but given that places such as Japan, Italy and Australia had 250 licensing laws in place one can imagine the stir that something that could hassle 750s on a track caused. The parallel twin 2MA variant being the UK variant and the 1KT model being the domestic Japanese variant. Variations between these two models being minimal, e.g. wording on the brake master cylinder in English or Japanese. Lighting arrangements were also different, to comply with UK type approval regulations, particularly the indicators were mounted on stalks rather than faired into the bodywork.

In 1989, the parallel twin reverse cylinder version, 3MA arrived

If you wanted a lightweight backroad weapon decorated with speedblock graphics in the late 80s and early 90s, your choice was clear: YAMAHA TZR250 3MA

In between, Yamaha's 1989-1990 3MA version of the TZR used an unusual reversed-head configuration that had the carburetors mounted on the front of the engine, giving the exhausts a clear shot up under the seat and out the tail-section, avoiding expansion-chamber clearance issues.

Backed by a six-speed gearbox and mounted in a classic Deltabox frame, the complete package made 50hp, depending on tune and weighed in at 308lbs wet.

This particular example has been well-used, with 20900 km on the clock, and does have some minor wear-and-tear, but is extremely clean with the fairings off.

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