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#365028 - 03/26/11 9:33 pm Spark plugs for A65'S??
Rusty Goose Online   content
BritBike Forum member

Registered: 11/01/10
Posts: 658
Loc: 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 Mountain Cub
1972 DKW 125
1967 Moto Guzzi V7

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#365054 - 03/27/11 1:00 am Re: Spark plugs for A65'S?? [Re: ]
Rickman Online   content
BritBike Forum member

Registered: 02/10/03
Posts: 2771
Loc: 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...

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#365082 - 03/27/11 5:07 am Re: Spark plugs for A65'S?? [Re: Rusty Goose]
leon bee Offline
BritBike Forum member

Registered: 12/14/02
Posts: 2820
Loc: arkansas
I hate NGKs, they always foul. Only Champion for me, N3C, maybe N4C.

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#365095 - 03/27/11 9:33 am Re: Spark plugs for A65'S?? [Re: leon bee]
BSA_WM20 Offline
BritBike Forum member

Registered: 05/05/04
Posts: 2916
Loc: 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.
_________________________
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Trevor

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#365125 - 03/27/11 2:11 pm Re: Spark plugs for A65'S?? [Re: Rusty Goose]
Rusty Goose Online   content
BritBike Forum member

Registered: 11/01/10
Posts: 658
Loc: 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 Mountain Cub
1972 DKW 125
1967 Moto Guzzi V7

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#365129 - 03/27/11 2:37 pm Re: Spark plugs for A65'S?? [Re: Rusty Goose]
raf940 Offline
BritBike Forum member

Registered: 03/02/06
Posts: 3444
Loc: 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
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b

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#365254 - 03/27/11 10:51 pm Re: Spark plugs for A65'S?? [Re: Rusty Goose]
DavidP Offline

BritBike Forum member

Registered: 10/21/08
Posts: 4204
Loc: 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 )
_________________________
A fool and his money are soon partying. grin

71 A65L

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#365279 - 03/28/11 1:52 am Re: Spark plugs for A65'S?? [Re: Rusty Goose]
Rusty Goose Online   content
BritBike Forum member

Registered: 11/01/10
Posts: 658
Loc: 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 Mountain Cub
1972 DKW 125
1967 Moto Guzzi V7

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#365384 - 03/28/11 6:11 pm Re: Spark plugs for A65'S?? [Re: Rusty Goose]
leon bee Offline
BritBike Forum member

Registered: 12/14/02
Posts: 2820
Loc: arkansas
I have some NGK caps on my dirty rat bike.

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#365576 - 03/29/11 6:23 pm Re: Spark plugs for A65'S?? [Re: Rusty Goose]
Porrick Offline
BritBike Forum member

Registered: 07/23/07
Posts: 64
Loc: 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.
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'66 A65L

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