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Boyer Bransden Electronic Ignition Black Box for Triumph BSA Twins PN# TBS-3576 A


Availability: Only 2 left in stock

Replacement Boyer Bransden MKIV Black Box Electronic Ignition Systems. As many of you know, with electronic ignition failure over time usually the black box is the issue. Technically this box is for Triumph and BSA twins but will also work on Norton models as well if you extend the wiring. This box will also upgrade your MKIII ignition to MKIV spec.

We understand electrics for British motorcycles can be daunting, if you have any questions regarding fitment and compatibility feel free to contact us prior to ordering.

For our 6 volt coils, click here.

For our complete selection of electronic ignitions click here.

We stock most Triumph, Norton and BSA items at the best prices you will find anywhere. If we don’t have it, we can get it if it’s in production!

Note: Due to the nature of electrical items, we do not accept returns on them. We are happy to provide additional support when possible, should you have issues with installation. We urge you to ask all questions prior to purchase and always check your parts book to assure fitment!

Please be confident about your purchase before ordering. If you have questions, please contact us.


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