Heavy Twins

One of the missing items from my bike is the Petcock I think it was removed when the tank was sent for chrome. 
Can anybody point me in the right direction as to the correct version for a 1956 Dominator 99?

Hi I thought I'd chucked in an LED bulb as slightly brighter than standard bulbs, but pop - fuse went!?  
Knowing little about 1961 / converted lectrics, is this expected?

Good afternoon all,
                              Question?Exhaust pipes glowing cherry red,whats your money on?incorrect ign timing or weak mixture?

A favour to ask.  What diameter is the rear wheel spindle? 
The full width alloy hub type fitted to the various feather bed models.
Thanks.

I seem to have aquired some new FAG bearings, ref NU306E M1,  bronze cages , suitable for a Dommy?  suspect they may be a thou OS to fit in slightly worn housings ?.

I am trying to find a tacho drive for my Dominator 99. They are obtainable from Andover or RGM at quite a hefty price. I notice ones on Ebay selling for about £25. They are intended for a vintage Massey Ferguson Tractor. 

Bit of a mystery on rear hub bearing for 1967 N15CS (standard Atlas hub)
Bearing is on the sprocket side and is the one in the hub, part no 17721

I have a 1969 Mercury SS.  The steering dampers normally have two holes drilled, but mine has four holes.  Can anybody tell me why my dampers would have four holes and the reason for it.  Would appreciate if somebody could throw some light on why

Hello good people of the NOC,

Evening folks, 
Managed to get out on my dom 99 deluxe at the weekend and within a few short miles I had engine oil leaks running down the left side cover.