Yamaha TZR250
Yamaha produced road going 2-stroke motorcycle, based on the TZ250 Yamaha racing bike. Parallel twin, V-twin, and reverse cylinder variants. Evolved as a natural replacement for the popular RD 250/350 LC series.
In standard form 50bhp is claimed at 10,000rpm. Although mid 40's is more realistic.
Racing
Still raced in the Yamaha Past Masters race series with the British racing club - BMCRC. Racing engines currently claiming circa 56bhp @ 11,000rpm. Racing pre-mix fuel ratios typically 1:30. Standard exhausts are difficult to improve on in terms of power nad torque but they are very heavy and impeed ground clearance. Jolly Moto exhausts are popular replacements as they are light and produce similar performance.
History
In production from 1987. 1KT vatiant being the UK variant and the 2MA]] model being the Japanese variant. Variations between these two models being minimal, i.e. wording on the the brake master cylinder in English or Japanese. Then came the reverse cylinder version 3MA, then the V-twins 3XV
Production of all TZR250s stopped in 1996
