Dual fire? - Page 5

**ringadingh** · 02-28-2011, 01:31 PM

Bill; What they mean by wasted spark is that Both Coils fire at the same time, one cyl is a TDC and the other is at BTC, when one coils fires both plugs at BTC it is referred to as a wasted spark since its not on a power stroke.

**brote** · 02-28-2011, 04:08 PM

Just like Cliff said. Left coil fires the front cylinder and the right fires the rear cylinder.
Here is the parts diagram .

cocheese72 · 02-28-2011, 04:35 PM

Quote:

Originally Posted by Ringadingh

Bill; What they mean by wasted spark is that Both Coils fire at the same time, one cyl is a TDC and the other is at BTC, when one coils fires both plugs at BTC it is referred to as a wasted spark since its not on a power stroke.

And I think that is happening or else these HD tachs would read half rpms when connected to one coil.

VulcanE · 02-28-2011, 04:54 PM

If you have a "dual fire" tach hooked to a single fire system, it'll read 1/2 the RPMs
If you have a "single fire" tach hooked to a dual fire system, it'll read twice the RPMs
If you have a "dual fire" tach hooked to a dual fire system, it'll read the correct RPMs
If you have a "single fire" tach hooked to a single fire system, it'll read the correct RPMs
My tach is a single fire tach, and it reads correct hooked to one or the other of the coils. doesn't matter which coil, as long as it is just one of them.

macmac · 02-28-2011, 07:25 PM

Quote:

Originally Posted by Ringadingh

Bill; What they mean by wasted spark is that Both Coils fire at the same time, one cyl is a TDC and the other is at BTC, when one coils fires both plugs at BTC it is referred to as a wasted spark since its not on a power stroke.

Ah, didn't know that. There are several ways to hook that up in theory. I don't 'go there' till I have too.

I haven't looked in the book to see the stagger either for the pistons. I had the idea they were like a 650 bonnie both up and or both down at the same time. I guess that isn't the way of it either.

I just know what's what if I need to get it fixed, and I don't fix what ain't broke

**Top Cat** · 02-28-2011, 07:51 PM

I got here late but since I went out to the garage and looked I'm going to add my 2 cents.
My right coil fires the rear cylinder and my left coil fires the front cylinder.
And now I have one more usless post in my post count.

reaper · 03-03-2011, 08:07 PM

Glad I could help boost everyones post count and have some entertainment. Maybe I should ask whats the meaning of life and see what kind responses I get. :)

ve3hzz · 03-03-2011, 08:09 PM

Quote:

Originally Posted by "Reaper" - Doug Grimm

Glad I could help boost everyones post count and have some entertainment. Maybe I should ask whats the meaning of life and see what kind responses I get. :)

4

**ringadingh** · 03-03-2011, 08:19 PM

Quote:

Originally Posted by "Reaper" - Doug Grimm

Glad I could help boost everyones post count and have some entertainment. Maybe I should ask whats the meaning of life and see what kind responses I get. :)

It doesn't look like its over yet.

jandreu · 03-03-2011, 09:50 PM

Actualy the meaning of life is 42.

ve3hzz · 03-03-2011, 10:01 PM

Quote:

Originally Posted by James "Bubba" Andreu

Actualy the meaning of life is 42.

I know I missed the other digit and hit POST, and then thought Let's see who get's it first....you win...

You now have the right to post more useless movie trivia

<JK>

macmac · 03-04-2011, 02:18 PM

I know what the meaning of life is...

Once, the first year of 3 living in a tee pee, a job I had was care taking at a camp ground in Md. There was a Dead Concert somewhere near by, and 2 dead heads showed up real late at night after the office was closed.

I met these 2 birds, and sat in there car tasting whiskey and smokin a little of their wild woods land weeds

With my long hair and beard the mistook me for a guru, and asked the very question "What's the meaning of life?"

My reply was instant, and the Meaning of life is prove you exisit.

Used to be with 39 cents you could get a cup of coffee too.

02-28-2011, 01:31 PM	#61
ringadingh Join Date: Aug 2007 Location: Newmarket Ontario Canada Posts: 35,387	Dual fire? Bill; What they mean by wasted spark is that Both Coils fire at the same time, one cyl is a TDC and the other is at BTC, when one coils fires both plugs at BTC it is referred to as a wasted spark since its not on a power stroke. __________________ 2002 Nomad aka Bountyhunter VBA #27 VROC #18951 Login or Register to Remove Ads
	0

02-28-2011, 04:08 PM	#62
brote Join Date: May 2009 Location: Lawrenceville, Georgia Posts: 905	Dual fire? Just like Cliff said. Left coil fires the front cylinder and the right fires the rear cylinder. Here is the parts diagram . __________________ Hank Brote W1HCB 2008 Diablo Black Nomad Lawrenceville, GA VBA # 1234 VROC # 32837 Patriot Guard Riders Naval Advisory Group Vietnam 69-70
	0

02-28-2011, 04:54 PM	#64
VulcanE Sr. Member Join Date: Jan 2008 Location: Cartersville, Georgia Posts: 4,838	Dual fire? If you have a "dual fire" tach hooked to a single fire system, it'll read 1/2 the RPMs If you have a "single fire" tach hooked to a dual fire system, it'll read twice the RPMs If you have a "dual fire" tach hooked to a dual fire system, it'll read the correct RPMs If you have a "single fire" tach hooked to a single fire system, it'll read the correct RPMs My tach is a single fire tach, and it reads correct hooked to one or the other of the coils. doesn't matter which coil, as long as it is just one of them. __________________ Cliff "VulcanE" Evans 2005 Blue & Silver 1600 Nomad VBA # 320 VROC # 20381
	0

02-28-2011, 07:51 PM	#66
Top Cat Join Date: Jul 2007 Location: Peoples Republic of New York State Posts: 15,154	Dual fire? I got here late but since I went out to the garage and looked I'm going to add my 2 cents. My right coil fires the rear cylinder and my left coil fires the front cylinder. And now I have one more usless post in my post count. __________________ Tim "TC" Conley VBA #9 2011 Victory Kingpin mine 2013 Victory Boardwalk -hers [LEFT][COLOR=#000000] [SIZE=4]
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03-03-2011, 08:07 PM	#67
reaper Advanced Member Join Date: Nov 2008 Location: St. Augustine, FL Posts: 591	Dual fire? Glad I could help boost everyones post count and have some entertainment. Maybe I should ask whats the meaning of life and see what kind responses I get. :) __________________ Doug 08 1600 Nomad FI Metallic Ocean Blue / Neutron Silver Web Slinger's Speedo face, Chuckster's Air Kit, Jay's LED Tail light, dshelly's throttle mod, Kuryakan Deep Bezel lens, Headlight Modulator, Kuryakan Run/Brake/Turn, DWG 2" speakers and amp, Stebel Air Horn Fire & Iron, Red Knights, ROK, VBA, VRA, VROC, IAFF
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03-03-2011, 09:50 PM	#70
jandreu Sr. Member Join Date: Jan 2010 Location: Makawao, Hawaii Posts: 1,409	Dual fire? Actualy the meaning of life is 42. __________________ James Andreu '07 1600 Red/Silver VBA Member #1356 jandreu@hawaiiantel.net
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03-04-2011, 02:18 PM	#72
macmac Sr. Contributor Join Date: Apr 2008 Location: Tamworth New Hampster 06 1600 Posts: 12,484	Dual fire? I know what the meaning of life is... Once, the first year of 3 living in a tee pee, a job I had was care taking at a camp ground in Md. There was a Dead Concert somewhere near by, and 2 dead heads showed up real late at night after the office was closed. I met these 2 birds, and sat in there car tasting whiskey and smokin a little of their wild woods land weeds With my long hair and beard the mistook me for a guru, and asked the very question "What's the meaning of life?" My reply was instant, and the Meaning of life is prove you exisit. Used to be with 39 cents you could get a cup of coffee too. __________________ 06 1600 Nomad Just call me Mac molon labe come and get it
	0

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