Starter in detail

Excalibur's starter was the result of some trial and error. The reduction of 4:1 ratio was used by employing a bicycle sprocket and chain. New flexible leads were added for ease of use.
The battery we use is the heavy duty one from a diesel Hiace. The starter motor itself is from a Toyota and has internal reduction gears. A half-inch-drive socket, is applied direct to the crankshaft which has the hexagonal from the centre portion of a lucas alternator rotor. This is conveniently keyed and already sized for the crank

 

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Starting has been very easy, with both chokes only being needed once, at the night drags.
The trolley is mutli-purposed. It carries the starter & battery & toolbox. Also carries the extended handlebars for maneuvering Excalibur around the pits. This really saves the backache due to the bike being so low. Its' clip-ons are 530mm high from ground level!

 
 

This is the rear drive sprocket which has just been lightened by a further 21grams. These are very hard skinned so I used a re-sharpened masonry drill bit, that has a tungsten carbide tip. The bit squeals and protests, but they do eventually get through. Resharpening the bits is possible with a normal 5inch disk grinder. Note: some types of disk work better than others.
The sprocket had previously been narrowed to accept 520 chromoly chain.

It's just been discovered that the recently acquired Gizzmo shift light isn't compatible with Excalibur's Boyer ignition. The Gizzmo is very erratic, basically unusable. It seems that they are meant for the tach signal from an ECU only.