Many thanks to strokerboy for finding it for me
The homologation special - "K1" model - was built, but in limited numbers. This was the ZXR750R . The race version had the same frame as the J models, but it sported 39mm Keihin Flatslide carburettors, full power engine, close ratio gearbox, alloy tank, fully adjustable suspension front and rear, single seat and was 5kg lighter than the J models.
A very original bike, unmodified, with supporting paperwork. Couldn't be happier with it
