Hi this link should download a pdf from Yuasa Motorcycle Batteries. https://www.yuasa.co.uk/info/downloads/application-guides/ If you scoot through to pages 48/49 you will see that all the post 2001+ VFR800 models are fitted with a YTZ12S battery - so that is what your bike needs. Whilst Yuasa are the OEM battery supplier for Honda I am sure there are cheaper supermarket "own brands" which will probably work OK - for a while. Hope that helps SkiMad