Sore Leg

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Once you turn the ignition switch off there isn't any power going to the kill switch anyhow is there.
Mike.
 
There are relays available that switch between alternate terminals. If you use the kill switch as an earth for the relay then it's default position with ignition on will be 'power to ignition' when you push it in it it breaks the circuit to the coil allowing the relay to switch to the unused terminal thus breaking the feed to the ignition system. I will have a look and see if I can find the Bosch part number for this relay.
 
12 volt battery

Mike: If you don't know, a fully charged 12v battery will show AT LEAST 12.6volts. 12.0 volts is partially discharged. Electronic ignition systems are very particular about proper voltage. In the automotive world, I have found that vehicles with bad alternators will lose the ignition when voltage drops below 11.5v, on average. The old ones with points will run sometimes as low as 4.5volts before quitting.
 
David,
I use Bosch style relays. Working from memory, I took the feed from the negative terminal of the battery through a fuse to the "30" terminal of the relay and from the "87" terminal of the relay to the Boyer. The white/yellow wire from the kill button ('71 or later) goes to terminal "86" and terminal "87" is sent to ground.
In this manner the relay is energized when the key is turned on which in turn feeds the Boyer. De-energizing the relay with the kill button opens the circuit to the Boyer.
These relays will trigger with as little as 150 milliamps.
 
I have just rooted through my bits and pieces in the workshop and the Bosch relay that I used as described is part number 0 332 204 150
 
Thanks everyone for their very helpful input, your depth of knowledge is astounding. As Ron & Norbsa suspected earlier it does appear to be a shagged battery(only a month old) it is discharging acid through one of the filler caps and wont hold a charge, i was perhaps thinking of a dry cell battery. I pulled the kill switch apart and managed to get it back together, it appears fine as does the circuitry, any thoughts on a dry cell battery :?:
Thanks Mike.
 
Not only does low voltage throw off the Boyer but excess voltage will also,good luck. Ride safely, James
 
Thanks James,
Did a voltage check on the battery, charging at 12.8 volts, a little high, a load test at 104 cca, recommended 90, also the battery level is just a little over full, hence the spillage, but it is over charged a bit but i wouldn't have thought it would be enough to make any difference.
Regards Mike
 
Well i checked the timing on the weekend 28 deg. before t.d.c. which you all know is about right for points not electronic, so i got a mate to sit on the bike in neutral with the clutch in and took it to 5000 rpm to reset the timing, it got to 4000 and she popped and coughed from there on till we set it at 31 deg. b.t.d.c. and she ran as sweet as a nut once we were on the money, also resoldered the wires at the plate as they looked a bit dicky, she now seems to run a lot smoother and starts a lot easier.
Thanks for the help. Mike
 
I'll have to add my 2 cents here.

For the last few weeks I had a flooding carb, and then a dead battery ontop. The flooded carb made for a very grumpy but rideable bike, sometimes one cylinder - when the battery died down things got down right ugly. Much as you have described - backfires, kickback, won't run above idle... nasty.
I literally rolled into the drive - popped the charger on the battery, swapped the float bowl (bad needle seat) and the bike was like new in an hour. :D

I am running a 3phase alt but a tiny battery - 3amp - I didn't charge the battery all winter and left the headlight (Halogen) on last week for 1/2 hour, then did alot of gridlock city idling. A night on the trickle charger has the battery back up to snuff and the alt keeps the charge, but the alt in city traffic wasn't enough recharge the abused battery.

Good luck!
 
Hey Mike Reg in Brisbane has one of my Boyer repair kits from a former visit to your fair city. If he hasn't put it to use yet he may let you borow it long enough to copy. I can send you my standard instuctions.
 
Thanks Norbsa, i met reg last year while i was looking for a bike and he had one for sale, he hails from this side of town about twenty minutes away, my email address is mikemcmanus@tpg.com.au or snail mail is Everton Engineering Pty.Ltd.
P.O. Box 5078
Brendale
Qld 4500
Aust.
Thanks again
Mike
 
I haven't needed to. The battery was just completely run down from lack of maintenance and carelessness. So far it has been keeping the charge just fine, but I can confrim that boyer gets weird when the juice is low.
 
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