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True Or False #142127
05/28/08 1:14 am
05/28/08 1:14 am
Joined: Aug 2005
Posts: 57
Florida
C
camshaft1 Offline OP
BritBike Forum member
camshaft1  Offline OP
BritBike Forum member
C

Joined: Aug 2005
Posts: 57
Florida
I have a 68 Bonnie with Boyer Electronic ignition. When setting the idle of each carburetor individually, Is it ok to unplug one spark plug at the time without fear of ruining the Boyer black box as somebody told me????
Thanks a lot.
JJC

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Re: True Or False #142128
05/28/08 2:04 am
05/28/08 2:04 am
Joined: Aug 2001
Posts: 4,759
Owego, NY, USA
Mark Z Offline
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Mark Z  Offline
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Joined: Aug 2001
Posts: 4,759
Owego, NY, USA
In a previous thread, it was pointed out (by Mr. Healy, I believe) that pulling a spark plug wire may cause damage to your coil, and this is with breaker point ignition as well as EI. Tension builds up in the secondary coil which is seeking a path to ground, which it may find through some weakened insulation, especially in an older coil. This will in turn cause more damage to the coil.

This practice is ok if you ground the HT lead to be disabled. You may get some suggestions on exactly how to do this.


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
Re: True Or False #142129
05/28/08 7:07 am
05/28/08 7:07 am
Joined: Aug 2007
Posts: 4,493
Kent UK
Blapper Offline
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Blapper  Offline
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Joined: Aug 2007
Posts: 4,493
Kent UK
I agree 100% with Mark above, plus why do you need to do that anyway - I never have?

Blapper redwine

Re: True Or False #142130
05/28/08 9:19 am
05/28/08 9:19 am
Joined: Oct 2003
Posts: 3,733
Emsworth, sunny south of Engla...
D
dave jones Offline
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dave jones  Offline
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D

Joined: Oct 2003
Posts: 3,733
Emsworth, sunny south of Engla...
You can ground the removed ht lead by fitting another spark plug into the cap and resting it on the cylinder head, making sure it stays there.

dave

Re: True Or False #142131
05/28/08 7:51 pm
05/28/08 7:51 pm
Joined: Feb 2008
Posts: 163
pennsylvania, usa
dale karger Offline
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dale karger  Offline
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Joined: Feb 2008
Posts: 163
pennsylvania, usa
make a jumper wire witha sparkplug cap on one end and an alligator clip on the other so you get a positive grounding. if you do lay the sparkplug on head make sure its far from the sparkplug hole. there is still gas in the carbs and it is possible for the gas vapor escaping to be ignited by the sparking plug. that'll scare the crap out of you at the very least.


76 T140V
79 Honda CB 650
79 Yamaha 175 Enduro
68 Chevy Impala Convert
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Re: True Or False #142132
05/28/08 10:30 pm
05/28/08 10:30 pm
Joined: Oct 2003
Posts: 3,733
Emsworth, sunny south of Engla...
D
dave jones Offline
BritBike Forum member
dave jones  Offline
BritBike Forum member
D

Joined: Oct 2003
Posts: 3,733
Emsworth, sunny south of Engla...
You don't take the plugs out of the head. You use an extra plug.
Dave

Re: True Or False #142133
05/28/08 11:02 pm
05/28/08 11:02 pm
Joined: Mar 2005
Posts: 446
Cincinnati, Oh
Jethro Offline
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Jethro  Offline
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Joined: Mar 2005
Posts: 446
Cincinnati, Oh
Lot of good posts to this, but I want to also mention that for ME... I haven't had to do this. I have a 71 650 engine, and am running dual VM32 Mikunis. I have a "balance" tube connecting the two carbs. I really think this tube has added a lot to low rpm idling. In fact, I searched here on the archives in reference to a balance tube. Anyway. Both carbs are set the same for jets, etc, and both slides are properly adjusted, and with the balance tube there, the bike runs damn well just as is. Do you have a problem that may be prompting the need to dial in your carbs seperately?

Re: True Or False #142134
05/29/08 6:42 am
05/29/08 6:42 am
Joined: Aug 2007
Posts: 4,493
Kent UK
Blapper Offline
BritBike Forum member
Blapper  Offline
BritBike Forum member

Joined: Aug 2007
Posts: 4,493
Kent UK
Anybody there?


Moderated by  John Healy 

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