NEWS FLASH - December 2013 We are now selling magneto bearings, insulators, oil seals and armature shims from our. Brightspark Magnetos NEW. At some of the equipment we use in our workshop for magneto servicing and overhauls. Remagnetisation Magnetos contain a permanent magnet to produce the magnetic field which, combined with the motion of the armature, produces the electricity for the sparks.

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When the magneto left the factory, the magnet would have been fully charged. However, despite being called 'permanent', permanent magnets do lose strength with, for example, use, age, temperature and vibration. The magnet in a 1950s magneto typically now has only about 70% of its initial strength. You can find out more in our. Two main effects of reduced magnet strength are: • The strength of spark is reduced.

Tests we have carried out show that the sparking plug current † at a particular magneto speed is roughly directly proportional to the magnet strength. So, if your magnet is 70% of full strength, your spark current is about 70% of full strength. ( † Here we were measuring the DC component of the HT current immediately after the spark was struck.) • The minimum speed required to produce sparks is increased. Our tests suggest that the minimum speed ‡ to produce sparks is roughly inversely proportional to the magnet strength to the power 3/2. So, if your magnet has decreased to 70% of full strength, the speed at which you need to kick over the engine to obtain sparks is about 70% higher.

( ‡ Here we were measuring the magneto speed to obtain 95% of sparks with a 3-point spark gap set to 5.5 mm at atmospheric pressure.) However, it is possible to restore the magneto's magnet to its initial strength by exposing it to a very strong magnetic field - remagnetisation. Brightspark Magnetos is now able to offer a remagnetising service, using our specially-developed remagnetising and measuring equipment to help you restore your magneto to tip-top condition. Magnetometer for measuring magnetic flux density at the centre of the armature cavity Measurement before remagnetisation Remagnetiser. With magneto body in place Measurement after remagnetisation So, we will measure the initial strength of your magneto's magnet and its polarity, remagnetise it with the same polarity (unless you ask us to reverse it), measure the resultant magnet strength, and send your magneto back to you with a report. Initially, this service is offered only for instruments having a 2-inch or 2-11/64' diameter armature (which covers most Lucas and BTH magnetos).

Because of possible customs difficulties, we regret that we are unable to provide this service to customers outside the EU. For Lucas N1, KN1, K1F, K2F and KVF magnetos and MO1L and MN2L magdynos, we can remagnetise the bare body without you needing to send us the whole magneto. However, for some other magnetos and magdynos which should not have the armature removed after remagnetisation, it is better if you send us the whole magneto.

The cost is GBP 18 for remagnetising a bare magneto body inclusive of packing for return, plus return postage at cost; or GBP 22 if you send us the complete magneto. Terms and conditions apply (see below). Customers requiring the remagnetisation service should in the first instance contact us by e-mail. We can entertain inquiries in English or French. Please state: • Your name, full address and telephone number. Bakugan Battle Brawlers Season 1 Sub Indo. • The make and model of magneto to be remagnetised. • The state of disassembly in which the magneto will be sent to us (e.g.

Bare body, or complete with armature and end housing) • Whether you will also require any EasyCaps, and if so how many of each type. • The postal service you wish us to use to return the item to you (e.g. Royal Mail Special Delivery, or First Class Packet). You can check Royal Mail and Parcelforce prices. We will then email you with a confirmed cost, payment details, and the address to which to send your magneto or magneto body.