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Where to find a 76 Bonnie kill switch #456359
09/28/12 8:42 pm
09/28/12 8:42 pm
Joined: Sep 2004
Posts: 35
Columbus, Ohio
rosskuhns Offline OP
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rosskuhns  Offline OP
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Columbus, Ohio
Or the guts to fit one- I've got a 76 that is in the shop, it's not been ridden in a few years thanks to some funky electrical issues; well the guys have gotten it running and told me that the kill switch looks a bit burnt/dodgy. They thought a replacement would be a good idea.

The kill switch on a '76 is integrated into the master cylinder IIRC- are there guts from another switch that would work in it? I see the sparx switch on domiracer that looks like it, but I don't know if it can be used just for the guts.

Or other ideas are appreciated!


Thanks,

Ross

(I did do a search but stopped after working through 3 pages of posts)

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Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456365
09/28/12 9:02 pm
09/28/12 9:02 pm
Joined: Jan 2008
Posts: 1,530
Farmington,Connecticut,USA
JBMorris Online content
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Hi Ross,
Having the same problem!

http://triumphbonneville.com/shopsite_sc/store/html/elec.html

Scroll down a bit.


1978 Bonneville T140V PX
Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456368
09/28/12 9:16 pm
09/28/12 9:16 pm
Joined: Sep 2004
Posts: 35
Columbus, Ohio
rosskuhns Offline OP
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Columbus, Ohio
Hi JB,

do you mean the one the 4th from the bottom?


Hmmm, that shows a separate switch; the shop is telling me it's a part of the master (and frankly I haven't looked long and hard at the bike that I can't recall). Maybe they're just not looking closely.

The one you linked to is $72, but I assume it's in Britannia, so shipping (and time) would be rough.

I see this one on domiracer that I wondered if I could gut
https://www.domiracer.com/comersus/store/comersus_viewItem.asp?idProduct=124364

Any giant issue with just having them bypass it and using the key only?

Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456369
09/28/12 9:28 pm
09/28/12 9:28 pm
Joined: Jan 2008
Posts: 1,530
Farmington,Connecticut,USA
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Farmington,Connecticut,USA
Quote
the shop is telling me it's a part of the master


Two wires from the switch are connected to the brake master cylinder side for the rear brake light.

That would be the only way it's 'connected', I do believe.
?


1978 Bonneville T140V PX
Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456375
09/28/12 9:51 pm
09/28/12 9:51 pm
Joined: Mar 2006
Posts: 3,835
Norfolk, UK
L.A.B. Online content
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L.A.B.  Online Content
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Posts: 3,835
Norfolk, UK
Originally Posted by rosskuhns
Maybe they're just not looking closely.


If they had, then they should have seen that the brake light switch is secured to inside of the master cylinder housing by a small screw. Once the screw has been removed, the switch can be withdrawn from the housing.


http://www.SteadfastCycles.com/cart...nfo&cPath=4_139&products_id=2281

Last edited by L.A.B.; 09/28/12 10:06 pm.
Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456387
09/28/12 10:16 pm
09/28/12 10:16 pm
Joined: Oct 2001
Posts: 1,204
Sydney, Oz
S
Shane in Oz Offline

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Sydney, Oz
On drum-brake models, the kill switch was part of the blinker switch block https://www.domiracer.com/comersus/store/comersus_viewItem.asp?idProduct=124363. That had a normally closed (NC) push-button switch for the kill switch, and a spare push-button switch (probably NO for the Bandit/Fury electric start).

The other switch block had the dip switch and 2 normally open (NO) push-button switches for the horn and headlight flasher.
The NO switches won't work for the kill switch, which has to be NC.

By 1976, the blinkers and dip switch were both on the left-hand block, so the right-hand block only had the push-button kill switch, an unused push-button switch (NO for the T160 and Commando electric start?) and an unused toggle switch. The toggle switch can be used as a kill switch, but the wire colour will be wrong.

Re: Where to find a 76 Bonnie kill switch [Re: Shane in Oz] #456394
09/28/12 10:41 pm
09/28/12 10:41 pm
Joined: Jan 2008
Posts: 1,530
Farmington,Connecticut,USA
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Farmington,Connecticut,USA
This unit has the white plastic 'pin' connectors.
On my bike, a lot of time was spent removeing these and re-wiring 'standard' spade type!

[Linked Image]


1978 Bonneville T140V PX
Re: Where to find a 76 Bonnie kill switch [Re: Shane in Oz] #456398
09/28/12 11:00 pm
09/28/12 11:00 pm
Joined: Mar 2006
Posts: 3,835
Norfolk, UK
L.A.B. Online content
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L.A.B.  Online Content
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Norfolk, UK
Originally Posted by Shane in Oz
By 1976, the blinkers and dip switch were both on the left-hand block, so the right-hand block only had the push-button kill switch, an unused push-button switch (NO for the T160 and Commando electric start?) and an unused toggle switch. The toggle switch can be used as a kill switch, but the wire colour will be wrong.


The T160 (but not Commando) and '77-'78 Bonneville had the long red toggle 169SA R/H switch assembly which had an upper push button for electric start, red toggle kill switch, and unused lower push button. I think only the Sparx red toggle switch is available under the original '76 T140 switch 99-1268 part number.


http://62.233.100.16/acatalog/Handlebar_switchgear.html

"T140V - T160 Right hand handlebar switch
Fitted to 1976 to 1978 models
OEM No. 19-1961"




http://www.feked.com/triumph-t140-t160-right-hand-switch.html

"Triumph T140/T160 Right Hand Switch for Ignition Kill etc.
Supplied with wire as per photos
OEM: 99-1268, 54033751, 19-1961"

Re: Where to find a 76 Bonnie kill switch [Re: L.A.B.] #456403
09/28/12 11:48 pm
09/28/12 11:48 pm
Joined: Jan 2008
Posts: 1,530
Farmington,Connecticut,USA
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This pic (as referenced by LAB) shows the connection over to the other side of the handlebar(brake switch), master cylinder side:

[Linked Image]


1978 Bonneville T140V PX
Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456469
09/29/12 1:36 pm
09/29/12 1:36 pm
Joined: Jun 2002
Posts: 10,262
Scotland
S
Stuart Offline
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Hi Ross,

Originally Posted by rosskuhns
I've got a 76 that is in the shop,

Originally Posted by rosskuhns
Any giant issue with just having them bypass it and using the key only?

As John Healy has posted in JB's thread, "Dealers should be aware that there is settled case law where a dealer was held negligent for substantial damages in a personal injury case for by-passing the bike's kill switch". shocked

Changing the subject slightly, ime don't bother with a new switch having pin connectors, or keeping the pin connectors on the existing switch cluster and/or main harness. They're crap. Caused problems even when they were new on T160's from late '74. As standard, the Sparx switch comes fitted with 3/16" o.d. bullets; use them or tab connections.

Hth.

Regards,

Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456476
09/29/12 2:50 pm
09/29/12 2:50 pm
Joined: Sep 2004
Posts: 35
Columbus, Ohio
rosskuhns Offline OP
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rosskuhns  Offline OP
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Columbus, Ohio
Thank you all for the insight! I had forgotten that most of that button was not even used.


Ross

Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456481
09/29/12 3:47 pm
09/29/12 3:47 pm
Joined: Sep 2004
Posts: 35
Columbus, Ohio
rosskuhns Offline OP
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Columbus, Ohio
Well Tom and I are going to go over to look at it today. I'm wondering if I could just put on this basic kill switch?

https://www.domiracer.com/comersus/store/comersus_viewItem.asp?idProduct=104144

$10 seems a bit better than paying $125 just to have a switch that by design 2 of the 3 buttons don't do anything smile

Ross

Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456486
09/29/12 4:25 pm
09/29/12 4:25 pm
Joined: Mar 2006
Posts: 3,835
Norfolk, UK
L.A.B. Online content
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L.A.B.  Online Content
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Norfolk, UK
Originally Posted by rosskuhns
Well Tom and I are going to go over to look at it today. I'm wondering if I could just put on this basic kill switch?

https://www.domiracer.com/comersus/store/comersus_viewItem.asp?idProduct=104144

$10 seems a bit better than paying $125 just to have a switch that by design 2 of the 3 buttons don't do anything smile

Ross


I believe that is likely to be an earth/ground switch, which would not be suitable.

Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456599
09/30/12 11:09 am
09/30/12 11:09 am
Joined: Jun 2002
Posts: 10,262
Scotland
S
Stuart Offline
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Scotland
Hi Ross,

Originally Posted by rosskuhns
$125

shocked It's 40 (about $60) from Sparx; will p&p from GB cost $65?

Originally Posted by rosskuhns
just to have a switch that by design 2 of the 3 buttons don't do anything

Well, it does also keep the front brake master cylinder attached to the handlebar ... whistle grin

Have you thought about opening up the switch cluster you've got (I've posted some advice in JB's thread), cleaning up the insides, replacing the connections to the main harness and seeing if that solves the problem (and saves you $125)?

Hth.

Regards,

Re: Where to find a 76 Bonnie kill switch [Re: Stuart] #456645
09/30/12 3:41 pm
09/30/12 3:41 pm
Joined: Oct 2006
Posts: 254
Stow, MA
Pete J 77T140 Offline
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Stow, MA
That's a good suggestion, Stuart. If the repro switches are built anything like the original he'll be doing exactly that before too long anyways.

Whenever I have a fault involving the post ignition switch side of the harness, I look at this handlebar cluster first. The problem has been there all but one time, and resoldering has been the cure.

Just don't lose the spring and ball bearing when you unscrew the nylon piece that holds the electrical contacts inside the bar mount. They are underneath the nylon piece and are released as that nylon piece comes up.

Pete

Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456686
09/30/12 9:13 pm
09/30/12 9:13 pm
Joined: Jul 2011
Posts: 197
Tampa, Florida
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bonneville15 Offline
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Tampa, Florida
rosskuhns:
I will give you an advice which was given to me by a oldschool Triumph mechanic/track racer, "do not use the kill switch to shut down your Triumph motorbike." He told me that when he saw me doing the same thing. Sounds you use the switch alot. That's why you had an electrical problem. I always shut down my bike using the key. The kill switch is for emergencies I suppose. If you want to shut off the engine, you are taking they key off anyway, right? Why make it a two step process instead of one. I hope you get something out of this advise.
William


ASE Automotive Master Tech.
Never regret anything in your life because at one point, that was what you wished for.
Always tell the truth, even if your voice shakes.
1977 T140V
Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456791
10/01/12 4:16 pm
10/01/12 4:16 pm
Joined: Jun 2004
Posts: 411
Columbus, Ohio, 1978 T140E
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tomterrific Offline
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Columbus, Ohio, 1978 T140E
The only time Ross uses a kill switch when I'm around, is on my bike right before I kick it. If my Triumph doesn't start on the second kick, I look at the kill switch. Ross has me trained.

Tom

Re: Where to find a 76 Bonnie kill switch [Re: rosskuhns] #456796
10/01/12 4:56 pm
10/01/12 4:56 pm
Joined: Oct 2006
Posts: 254
Stow, MA
Pete J 77T140 Offline
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Not sure why I shouldn't use the kill switch. I myself feel more comfortable knowing it's working, and not frozen closed. So I check it by using it.

My troubles with it have been old wires and solder joints breaking from age and vibration - not mechanical ones.

As far as emergencies go, I found it mighty useful when one slide stuck wide open when I was doing plug chops. Glad I didn't have to fumble around for the key when that happened.

Slides can stick - especially if the carbs have been off the bike a few times -- they distort when you tighten them back up -- even if you're very carefu8l - as I have been. And they tend to stick at wide open - not at low throttle openings.

Then it's "Yeeee haaa -Hang on cowboy!



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