the best and most reliable results use a BT-H magneto for your ignition source.
I fitted one of your excellent Magnetos to my Venom in
January of this year. I would have written to you earlier
but as it rained for most of February I have only been able
to take the Velo out for some serious road testing in the
past couple of weeks.
First things first. The new Magneto was very straightforward
to fit (if you discount the fiendish way Velocette attach
their Magnetos to begin with, the need for doubly
articulated fingers and a spanner which Salvador Dali would
have been proud to own!). The interesting part was in
finding somewhere to mount the HT connector. As I wanted the
Venom to look as standard as possible I decided to locate it
behind the battery box. After making a small mounting
bracket out of aluminium strip and relieving the back of the
battery box it mounted very neatly, out of sight on
the rear battery strap.
Timing the ignition with the new Magneto was so easy that
once completed (5 minutes) I was left with this strange
feeling that I must have left something out or be doing
something wrong - no cigarette papers, no requirement for
three arms, or two sets of eyes, and no profane language -
wow! How will it ever catch on?
The Venom started with the first kick and has done so every
single time since!!! Hot or cold, one swing on the kick
starter now brings it thudding into life. As Vinnie Jones
(Lock, Stock and Two Smoking Barrels) might have said "It's
been emotional". I can now actually don all of my bike gear
BEFORE I start the bike.
Riding - The bike is now much smoother, pulls more strongly
and revs much more freely than it did before. I still have
some adjustments to make to the fuelling (I think the vastly
improved ignition now allows other issues to show up more
than they did previously) but it is a real treat to ride. I
have spent a good deal of money on restoring my 1959 Venom
but I can honestly say that the money I paid for the new
Magneto was the best £600.00 I have spent on the bike
(actually on any bike!). I would recommend it as a 'must
have' purchase to anyone.
Thank you for your excellent service and wonderful product,
Dr Peter Spencer
26th March 2014
What can I say but WOW. My Rapide has never sounded so good.
The throttle response is amazing. The neighbour even put his
head over the fence as he thought I had a new bike.
The unit was so easy to fit .
I canít wait to run the engine in now that I have confidence
it wonít stall when hot.
Norwood, SA 5067
Many thanks, received the
new mag and my 61 Bonneville is running better than ever.
I'm really preaching the BTH over here in Oz. I was
actually put on to you guys from a speedway friend of mine
that uses your mags in his supercharge Vincent speedway
bike. He has run them on all his bikes for years"
JKS Industrial Electrics
Hope you had a nice weekend. I finally got to ride my Gold
Star I put one of your Mag-Dyno's on last year and it ran
great!!! I've been trying to sort the ignition since about
2006 and finally threw up my hands and tossed the Alton
and Boyer and went with your Mag-Dyno. And that seems to
have sorted it! Many thanks!
I saw my friend Gus V this weekend and he is thrilled with
his BT-H on his Vincent and can't wait to get his BT-H
Mag-dyno mounted on his Gold Star. I'm telling everyone I
know about the simplicity of your BT-H magnetos and mag-dynos!
Keep up the great work!
I just wanted to drop you a line to let you know how
incredibly pleased I am with performance and looks of my K2F
style magneto. Not only was it a breeze to install and time,
I have to say the engine has never run so well AND has the
added bonus of fooling all my vintage bike loving buddies
into thinking it was a genuine Lucas mag! Many thanks for a
23rd July 2013
Just a quick note to say I have started and tested the bike
having fitted my new electromag!
It is a different bike now as it starts easily and pulls
progressively through the rev range!
Philip Moss - Eire
Arrived 5 mins ago - looks the business! Thanks!
Kerry Wilton - Dubai
BTH Components Ltd make
new, self generating, magneto ignitions systems to
provide easy starting and good performance. They are suitable for both road and competition use.
Our aim is to give an efficient, friendly and personal service to all our
We do not offer a repair service or supply any parts for BT-H magnetos made prior to
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