http://www.geckomotorcycles.co.uk/magento/honda-nsr250-under-slung-rear-brake-kit.html

Does anyone have this kit fitted or have the fitting instructions? I have the kit which seems to have all the parts and few more than whats shown but cant figure out how it all fits

I have one fitted to mine, have a look at my track bike in the members project section. I just started with an Rs caliper and made the rest of the parts myself.

Quite straight forward but you do need an extra lug welding on the swing arm.