Changing the points

Contact breaker points used in the Quick 50 are also the same as the type 2 points used in some NSU Quicklies. They are held on by an adjuster screw which can be loosened to adjust the gap, and a spring clip on the central pivot post.

Remove the adjuster screw 

Contact breaker mounting screw.

... and lever off the retaining clamp.

Before removing the points note the order of components on the moving point electrical contact screw here indicated with a screw driver. These are 5 and 6mm sizes, but its really hard to remove the points until the wires are removed  because the wire length is insufficient. An extra 5cm  would have worked wonders for convenience here!

Remove the moving point by lifting it off the central post. NOTE the order of attachment . From inside the points towards the exterior the order is 

Bolt head, moving point leaf spring, insulating washer, Fixed point, insulating washer, electrical contacts (2 wires in this case), washer, spring washer, nut.

New points

It is REALLY difficult to attach the wires and washers to the electrical contact bolt. This is fitted in such a way that there is too little slack in the wires and you're forced to try and fit the various washers etc using fat fingers crammed into the space above the lighting coil. Since the bolt hangs downwards from its head through the fixed plate, any loss of grip on any of the components allows them to slip off the vertical bolt. I recommend placing a tissue in a tray beneath the bike whilst trying to fit the points as you WILL drop them and if they are allowed to bounce you will spend hours looking for tiny washers. I found this process pretty much impossible but eventually twisted the points and wires so that the bolt was horizontal before attaching the wires and then rotated it back into position, allowing the wires to slip round as I did so. It did work but did lead to some strain  in the wires like a spring. Make sure the electrical contacts to the moving point do not contact the horns of the lighting coil beneath which are earthed. Mine did come quite close- closer than Id like. Compare the pictures below with the fitment of the original points and you'll see what I mean. This arrangement does work but I may have to revisit it to address this spacing later.

Fixed point installed and connected

Add the moving point and re-clip it into place.

Adjust the gap.