Electrical

So today I lost the bakelite knob. It's not the first time. 
Has anyone been enterprising and changed it for a decent key switch off, on, on with pilot, on with main. Any that can be recommended? 

Royal Enfield Bullet alternators look very like the unencapsulated Lucas ones on Nortons. Would one fit? They are cheap and certainly effective - the one on my 1998 Bullet works a treat.

I am restoring my 1972 Commando Interstate & need help with the wiring. I am clueless with electrical items. Is there anybody in my area (Coalville) who would be willing to rewire my bike or suggest someone who could.

Here's a strange one. I've soldered together a magneto timing light with a 3,5 mm audio jack for a headphone and an NE555 IC in it that generates the sound. Naming that component indicates I know about this stuff, but I don't really...

I was looking a spare to replace the Cam ring in my auto-advance magneto to rebuild it.
Anyone can address me to good source of spares?

/Giovanni

Hello All,

"People say" spark plug polarity is important.  But:

1) Why?  If the spark is at say 10,000 volts, why should adding or subtracting 12 volts matter?

Is it possible to buy new rubber seals, grub screws etc? 
Mine vibrated off today - luckily fell into the space behind the headlight so was able to refit once I found an Allen key that fitted. However the rubber seal is really brittle.

Does anybody know why an ignition coil gets hot. 
I was running my Dominator just off the battery, and it got really warm, it's a MA12coil 12v battery.
Also does anybody know what i can do to fix this.

Need a pair for my old girl which runs 12v twin coil.  So a pair of lb05f 5ohm caps about 14" long.  All I can find is kits or bits to make them up myself - never done this and don't really want to start now.