Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
if you leave your engine 'naked' as it were, ie, not painted, it would end up as a fir ball of corrosion in no time at all.
The engines are painted and lacquered from the factory and the casings were satin polished and lacquered to protect them from corrosion.
I am far from an expert but the paint on your engine, by what I can see in your piccies, looks in quite good order. If you were to strip the varnish / paint off and then leave it bare that is when the alloy oxidises and goes furry. Also, an Engineer will tell you it's not important what the outside of the engine looks like, it's how it's built and how it performs on the inside that is important
.... an engine has got to look blingy (must be a girl thing!!!!)
There's a clutch tool on fleabay for under £13. I've used mine loads of times on mine and various mates with 400shttp://www.ebay.co.uk/itm/Honda-CB400-FOUR-FOUR-400-4-CLUTCH-TOOL-SOCKET-SERVICE-GEARBOX-SPECIAL-hj-/262755821419?hash=item3d2d77a76b:m:meuG-nUEmAj41YB5aW1ntig
DO NOT under any circumstances cut holes for wires in ally bars, if you look at Honda steel bars they are strengthened where the wires exit at the centre. Way back when saw many "broken" bars where holes had been cut cos the owner didn't want to pay Honda's replacement prices