Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Do it. Avoid nightfall and mud. Have a mirror though as you'll need to look out for the rozzers.
I've added 2 more images in the link previously of the headlamp rim which had one dent in it. I've managed to planish it out to a pretty good standard, well chuffed. Sorry to blow my own trumpet.
Continuing the electrical theme, I thought I should add an image of the fuse box, sigh.https://photos.app.goo.gl/a1kTapbnv5tG81fN7
Found a post by Ashimoto, anatomy of a 400/4 horn which gave me the means to have a look at mine. Looking out for a new l/h switch at the moment as mine is lacking a horn button. So a natural step to have a look at the horn on the bike. Removed it and put 12V on it and dead as a Dodo. Measured resistance across the terminals and it was open circuit. Removed the crimped front part away from the main body to find everything inside looked like new, apart from the contacts which were heavily oxidised. I sanded them in situ as I thought lifting the upper bar up and across might damage it. Checked across terminals and started to show some resistance, can't remember the reading, bit more sanding and then test. Just holding the front cover on and applying 12V I now have amazing Mallard impression device. Bit more tweaking and now its starting to sound like a horn. Externally it's very manky however at least now I know it's worth resurrecting and it's one more part of the bike that can stay original. Felt a bit like a Frankenstein experience. To quote Ashimoto, "More power Igor".Mine came without a horn or any mounting bracket if there is one. That will be one of the last things I sort out.Pics of Hornhttps://photos.app.goo.gl/vkiiYBA7onCjZ7pe9