For the best and most reliable results use a BT-H magneto for your ignition source.

Another small batch of BMW ignition /alternator units for the pre 1969 twins is in production.  Would the people who expressed an interest please get in touch.  First come first served.  Should be ready early August. Details

Advance notice. BT-H  will be closed during the following periods:
                          July: Thurs 10th - Fri 18th. Sep: Fri 5th - Mon 15th.

Company Profile

BT-H MAGNETOS LTD make new, self generating, magneto ignitions systems to provide easy starting and good performance.  They are suitable for  both road and competition use.  The units are designed and manufactured, in house, at our premises in Barwell, Leicestershire, near to the Mallory Park race circuit.

BT-H MAGNETOS LTD  and the BT-H registered trade mark, is owned by Tony Harris.  Our aim is to give an efficient, friendly and personal service to all our customers.

N.B. We do not offer a repair service or supply any parts for the old original BT-H magnetos.

The BT-H name was purchased from Marconi in early 2002.
A historic note.  BTH, or more correctly BT-H using a hyphen are the initials of the original founders of the British Thomson-Houston company.   BTH magnetos were considered to be the magneto of choice in the classic era.

Please browse our pages for information about our self generating magnetos, components and services.   Products