Fitting Electronic Ignition To A BSA A10 or A7.

We are often asked how difficult it is to fit a Classic Solutions magneto replacement. Well here is a blow by blow guide to show how we converted a 1959 A10 Super Rocket (not standard) to electronic ignition.

This A10 is fitted with a Lucas K2F magneto with manual advance and 6 volt electrics. We sell many 6 volt magneto conversions however in this case the customer wanted a 12 volt conversion at the same time as the ignition change. Our recommendation was to fit an electronic regulator to regulate the output of the original 6 volt dynamo to 12 volts. The ignition system used on this motorcycle is the Boyer Bransden Micro Power ignition although we can also fit Pazon, Sparx or our own electronics.

The timing cover is removed (be prepared for a little oil to come out when the cover is removed) and the magneto drive pinion is removed.

Loosen the nuts and pull the magneto clear.

You may decide to sell the magneto to subsidise the cost of the ignition. www.ebay.co.uk

Fit the new magneto replacement housing and secure using the original nuts. Either fit a new triangular gasket or use silicone sealant.

Refit the original drive pinion. The Boyer Ignition will give fully automatic ignition advance and retard electronically so a fixed timing pinion is required. If a mechanical auto advance was originally fitted it can also be used to drive the mag replacement however the movement of the bob weights must be restricted by either bending in the control lugs or welding.

Set the crankshaft to the position where the ignition should fire when fully advanced.

Adjust the position of the magnetic rotor inside the mag replacement so that the trailing edge of the magnet is visible in the centre of the timing hole. NOTE! For analogue systems the CENTRE of the magnet should be visible in the centre of the timing hole.

Once the engine is started and warmed up the ignition timing can be adjusted by turning the stator plate. This can be done with the engine running.

The wiring is very simple and should be protected with an in line fuse.

The installation in the tool box is uncluttered.

Here we see the location of the electronic voltage controller (replacing the voltage control box) and the Boyer Bransden ignition control box (blue).

We normally hide the ignition switch in the rear of the tool box. The switch we have chosen was bought from a local car accessory shop.

The ignition coil is situated beside the battery and in this picture you can see that we have routed the HT leads downwards along the engine plates so that they come up towards the spark plugs from a similar direction to the original magneto. This is purely to choice as the location of the coil is unimportant. (Analogue systems should have a good flow of air around the coil).

Here we can see the magneto replacement fitted.

The complete installation is tidy, reliable and maintenance free.

feel free to e-mail info@classicsolutionsuk.com