Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Doesn't a k3 have a concealed cap though?
I thought so, yes I really like the shape of that tank
You can easy use a CB550K0, k1 or K2 and buy a F/ K3 tank . I have a 550K1 with a F2 tank fitted.https://www.sohc.co.uk/index.php/topic,20419.0.html
My 550F is still for sale , look in member sales