By coincidence, this thread started while I was on the phone to an Odyssey supplier, finding out about their batteries, as the battery in one of my bikes has died.
I am confused, as the Yuasa YTX14BS (as recommended by Francois for his starter) is quoted on the Yuasa website as 200CCA, while the Odyssey PC310 (the only Odyssey which will go in the same space ) is only 100CCA. On a Vincent, I have a YTX20BS with 270CCA.
Even if the quality is better, fewer CCA will not help a starter-equipped bike, especially at £88 per battery.
Further recommendations gratefully received.....
As for black rubber batteries, I hide garish white plastic ones in a sheath of old inner tube-they are black rubber......
http://www.odysseybatteriesonline.co.uk/odyssey/products/productspec.php
http://www.yuasabatteries.com/pdfs/2008yuaapp.pdf