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#365028 - 03/26/11 9:33 pm Spark plugs for A65'S??  
Joined: Nov 2010
Posts: 724
Rusty Goose Offline
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Rusty Goose  Offline
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Joined: Nov 2010
Posts: 724
Sacramento California
I need plugs for my '66 A65L (twin carb 1970 head, using Sparx ignition). NGK's seem to be easily available to me. What # am I looking for. Or is there another brand I should consider?

I'm not trying to start anything as inflamitory as an oil thread here!

Rusty


1967 A65 Lightning
1967 Triumph T20 Mountain Cub
1967 Moto Guzzi V7
1969 B44 Victor Special
1966? Royal Enfield Interceptor
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#365054 - 03/27/11 1:00 am Re: Spark plugs for A65'S?? [Re: ]  
Joined: Feb 2003
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Rickman Offline
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Rickman  Offline
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Joined: Feb 2003
Posts: 2,884
Ohio
Generally,
I like B8ES NGK's for my A10's and A65's.
For me, Champion's always foul out.

More'n a dozen years ago, I ran accross a bargain on ND plugs, W20ES-U, and W22ES-U, and I got several boxes at the time. They've been working fine for me all this time. I still have a few boxes left. Looks like I have plug stock for a few years yet...

#365082 - 03/27/11 5:07 am Re: Spark plugs for A65'S?? [Re: Rusty Goose]  
Joined: Dec 2002
Posts: 3,227
leon bee Offline
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leon bee  Offline
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arkansas
I hate NGKs, they always foul. Only Champion for me, N3C, maybe N4C.

#365095 - 03/27/11 9:33 am Re: Spark plugs for A65'S?? [Re: leon bee]  
Joined: May 2004
Posts: 3,548
BSA_WM20 Online content
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BSA_WM20  Online Content
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Joined: May 2004
Posts: 3,548
Sydney Australia
As a general rule modern "fuels" require one grade hotter than specified for real petrol.
The more time you spend running slowly or at idle the hotter plug you will need.
This is simply to prevent the heavy oilly gunk in the fuel condensing out on your plug causing it to foul.
On a club run I go 2 grades hotter while n long trips I usually go only 1 grade hotter which in the M20 means a BP5HS or BP6HS.
The actual equivalent plug would be 1/2 way between a B7 & B8.

Check if you can run the projecting electrodes without fouling on your piston by putting a lump of plasticine around .040" to .050" on the end of the plug & kicking the motor over.

Platinimum or any other "exotic" metal plugs will foul less than standard plugs as standard plugs were designed to burn stuff called "petrol" which sadly is no longer available.


Bike Beesa
Trevor
#365125 - 03/27/11 2:11 pm Re: Spark plugs for A65'S?? [Re: Rusty Goose]  
Joined: Nov 2010
Posts: 724
Rusty Goose Offline
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Rusty Goose  Offline
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Joined: Nov 2010
Posts: 724
Sacramento California
What spark plug caps should I use. I assume a resistor type with the EI. 3 ohm, 5 ohm??


1967 A65 Lightning
1967 Triumph T20 Mountain Cub
1967 Moto Guzzi V7
1969 B44 Victor Special
1966? Royal Enfield Interceptor
#365129 - 03/27/11 2:37 pm Re: Spark plugs for A65'S?? [Re: Rusty Goose]  
Joined: Mar 2006
Posts: 3,648
raf940 Offline
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raf940  Offline
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Joined: Mar 2006
Posts: 3,648
gastonia nc
my A65 with Pazon and HD dual outlet coil....Lucas bumblebee solid copper core wire..Champion 1960s style bakelite caps with resistor 'pill' removed...Champion N4C...but that's just me


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando project
#365254 - 03/27/11 10:51 pm Re: Spark plugs for A65'S?? [Re: Rusty Goose]  
Joined: Oct 2008
Posts: 4,861
DavidP Offline
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DavidP  Offline

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Posts: 4,861
Gnashville
I use N4c in my '71, though I have also used B7ES. Zelda seems to like the Champions just a little bit better.
I also have the Sparx EI. I have used 5K resistor caps, but it gets a fatter spark with non-resistor caps. I currently use NGK model LZFH non-resistor caps with copper-core wires.

As I understand it, resistor caps are only needed with a digital EI or digital regulator (or if you listen to the radio while riding. laugh )


Stepping on others doesn't make you stand tall.

71 A65L "Zelda"
92 BMW K100rs "Gustav"
#365279 - 03/28/11 1:52 am Re: Spark plugs for A65'S?? [Re: Rusty Goose]  
Joined: Nov 2010
Posts: 724
Rusty Goose Offline
BritBike Forum member
Rusty Goose  Offline
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Joined: Nov 2010
Posts: 724
Sacramento California
Thanks DaveP, that's what I needed. I was wondering about interference with the ei. Good to know.

Is it bad taste to have Champion plugs with NGK caps?????


1967 A65 Lightning
1967 Triumph T20 Mountain Cub
1967 Moto Guzzi V7
1969 B44 Victor Special
1966? Royal Enfield Interceptor
#365384 - 03/28/11 6:11 pm Re: Spark plugs for A65'S?? [Re: Rusty Goose]  
Joined: Dec 2002
Posts: 3,227
leon bee Offline
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leon bee  Offline
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arkansas
I have some NGK caps on my dirty rat bike.

#365576 - 03/29/11 6:23 pm Re: Spark plugs for A65'S?? [Re: Rusty Goose]  
Joined: Jul 2007
Posts: 68
Porrick Offline
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Porrick  Offline
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Joined: Jul 2007
Posts: 68
Maryland
NGK B8ES and resistor caps for my 66 A65L with sparks EI and HO alternator and dual output coil. Nice fat spark and no problems.


Porrick
'66 A65L

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