Heron decided to invest in a new, light weight chassis made from Ciba-Geigy Bonded Aeroweb (a honeycomb/composite) material, constructed by Nigel Leaper. The first two prototypes were made with an aluminium cladding (painted white) but the following six frames just used the (black) honeycomb material.
Records show that this bike (TSR08) was the last one constructed, in 1986, and was ridden at Spa by Kevin Schwantz to 10th place (in Rizla colours) – his first points in Grand Prix.
Later in the season it was ridden by Niall MacKenzie in the Skoal Bandit colours seen here. He scored three top ten places and was on the front row of the grid for the last race of the year, at Misano.
The motor was the final version of the square four, the reed-valve XR70RV which produced 148hp at 12,500rpm (with UK developed exhausts, heads & air-boxes). Dry weight was 115kg. Top speed 295kph.
The first bike (TSR1-0) can be seen at the Barber Museum in the US.
Phil Aynsley sadly passed away in 2023 after a life spent travelling the world photographing many of the rarest and most beautiful motorcycles ever made. We are proud to continue showcasing his catalogue of work on MCNews.com.au.
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