• Welcome to the website of the Vincent H.R.D. Owners Club.

    Should you have any questions relating to the Vincent H.R.D. Owners Club, or Vincent H.R.D. motorcycles in general, please contact Graham Smith, Hon. Editor and Webmaster by calling 07977 001 025 or please CLICK HERE.

    You are unrecognised, and therefore, only have VERY restricted access to the many features of this website.

    If you have previously registered to use this forum, you should log in now. CLICK HERE.

    If you have never registered to use this website before, please CLICK HERE.

Boyer Box in Comet

JustinGlory

Website User
Non-VOC Member
My Comet that is fitted with a Boyer Electronic kit has taken to putting out a constant spark. ?? When I turn ignition key to "ON", everything is fine. At compression stroke, I get a constant fire or super fast firing. Not sure which one. I've never encountered this one. Any ideas? I assume that it's the box, but would love to hear any suggestions.
Justin Kell
Los Angeles
 

Pete Appleton

VOC Hon. Social Secretary
VOC Member
VOC Forum Administrator
Boyer interference

The constant spark is caused by interference from the first spark causing the processor in the boyer box to re-boot, thus causing another spark and then another & so on. Possible causes are :-

Partially discharged or defective battery
Bad connection in the ignition switch
Bad earth connections at the coil and boyer unit
Wires from the 'pickup' plate running close to HT or LT coil wires
Dodgy spark plug or Ht lead
Faulty filter circuitry in the Boyer unit.

My suggestions are :-
Try using a slave battery.
Jury rig the wiring to cut out as much spare wiring as you can in order to reduce the effect of interference

Pete
 

JustinGlory

Website User
Non-VOC Member
bad battery

Pete,
Thanks. I always forget the part about checking the easiest things first.
I used a gel battery last time, and I've never used one before. It's about a year old, so could very possibly have expired. I'm told that they do not have a remarkable shelf life. Checked the coil, checked the ignition switch, checked the grounds and checked the battery fro 12V.
Justin
 

Latest Forum Threads

Can't Find What You Need?

Buyer Beware: Fake or Real?

The Mighty Garage Videos

List of Forum Categories

Top