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Author Topic: FAAAAAAACK!!!! I need British bike help!  (Read 1091 times)

Offline Tune-A-Fish©

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Re: FAAAAAAACK!!!! I need British bike help!
« Reply #10 on: Mar 23, 2017, 18:48:29 »
Your going to be at the ATM a lot. I have a good brain box if that one took a dump might be a week or two before I can get to it tho.


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Offline teazer

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Re: FAAAAAAACK!!!! I need British bike help!
« Reply #11 on: Mar 23, 2017, 19:44:59 »
That looks like the zener diode a.k.a. voltage regulator.

Offline apparatusmc

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Re: FAAAAAAACK!!!! I need British bike help!
« Reply #12 on: Mar 23, 2017, 20:15:00 »
That looks like the zener diode a.k.a. voltage regulator.
Definitely the zener diode regulator
1. Disconnect the power leads to Boyer unit
2.turn power on to see if fuse still zaps
3. If it does, disconnect wire to zener
4. If this solves issue order a combination regulator/rectifier unit like a Tympanium, Ricks, etc.don't waste your time just doing the zener. You could also disconnect the output white lead from the rectumfrier to make sure it is not shorted
5. If you still have sparks in your shorts start looking for shorts.
Typical problem areas are in the rats nest under the tank, the headlight, and the crappy Lucas hi/lo beam switch on the handlebar. I just fixed one that blew the fuse every time I switched beams.

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Offline ApriliaBill

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Re: FAAAAAAACK!!!! I need British bike help!
« Reply #13 on: Mar 23, 2017, 20:35:04 »
 I'm kind of an idiot and probably not making myself clear. I'm not blowing fuses. The one that blew was literally taped at each end to the wires. I think it blew when the wire came off the "Zener" and arced on the frame. The lights, blinkers and horn are working fine. Right now, it seems to not be getting Fire. I'm going back out tomorrow to start checking stuff. The bike ran fine so I never bothered to check stuff (I know, I'm a Bonehead) and the wires were stuffed behind the battery. There is no rats nest under the tank, wires are in a tube. I haven't opened the headlight yet. Right now, looking at the easy stuff. Not quit sure what happened to running fine to no fire. I'll be looking at the suggestions and following your instructions hoping to hunt this down...
« Last Edit: Mar 23, 2017, 20:38:09 by ApriliaBill »
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Offline apparatusmc

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Re: FAAAAAAACK!!!! I need British bike help!
« Reply #14 on: Mar 23, 2017, 20:50:36 »
I'm kind of an idiot and probably not making myself clear. I'm not blowing fuses. The one that blew was literally taped at each end to the wires. I think it blew when the wire came off the "Zener" and arced on the frame. The lights, blinkers and horn are working fine. Right now, it seems to not be getting Fire. I'm going back put tomorrow to start check stuff. The bike ran fine so I never bothered to check stuff (I know, I'm a Bonehead) and the wires were stuffed behind the battery. There is no rats nest under the tank, wires are in a tube. I haven't opened the headlight yet. Right now looking at the easy stuff. Not quit sure what happened to running fine to no fire. I'll be looking at the suggestions and following your instructions hoping to hunt this down...
I understand...I may have overreacted because I have fixed so many cobbled up Brit wiring harnesses.  If all is ok with the battery hooked up, but no fire, it is either the wiring to the trigger unit, wiring to the coils, or the brain box itself. Take a look at the Boyer troubleshooting and installation sheet. You mentioned that it was kicking back before
finally ceasing to fire which makes me think the brain box may be bad. If you remove the plugs, hook them up, lay them on the head, and kick the bike over is there no spark, or is it just not starting.?
If you do have spark it may be as simple as the trigger Assy. has come loose and is way out of time.


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Offline ApriliaBill

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Re: FAAAAAAACK!!!! I need British bike help!
« Reply #15 on: Mar 23, 2017, 20:54:41 »
Excellent, that's the first thing I'll check in the a.m.
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Offline teazer

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Re: FAAAAAAACK!!!! I need British bike help!
« Reply #16 on: Mar 24, 2017, 13:21:53 »
The other thing to keep in mind is that 90% of electrical problems turn out to be lack of fuel ;-)

Agree with the last suggestion.  If it won't start, check for sparks first.  If possible use a spark tester or HT lead to the head/barrel without a cap.

Offline beachcomber

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Re: FAAAAAAACK!!!! I need British bike help!
« Reply #17 on: Mar 24, 2017, 13:30:19 »
It's the puking oil I don't get ??? Am I missing something in the analysis ?
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Offline teazer

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Re: FAAAAAAACK!!!! I need British bike help!
« Reply #18 on: Mar 24, 2017, 23:49:20 »
It's a BSA A65, what's to get?   ;-)  More likely the oil drained back through the pump with a one way valve sticking.  Should drain the sump completely just in case that's part of the problem.  Kicking back is usually a sign of ignition way too far advanced as someone suggested.


Offline ApriliaBill

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Re: FAAAAAAACK!!!! I need British bike help!
« Reply #19 on: Mar 25, 2017, 19:39:04 »
 I was only able to get in the garage for a few minutes today. No spark to either plug....
"Do not neglect to show hospitality to strangers, for by this some have entertained angels without knowing it."