Author Topic: A7 Spark Plugs  (Read 1533 times)

Offline Felters

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A7 Spark Plugs
« on: 16.09. 2011 05:59 »
I've done a search but there seems to be a variety of advice... there's a surprise.

So the conventional wisdom from the suppliers is that the Champion L82C is the replacement for the L10S. Yes?

'59 Iron head A7 - not raced or thrashed but will be used regularly. What would you buy?

Cheers
Mike
'59 BSA A7 and '02 BMW 1150RT

Online bsa-bill

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Re: A7 Spark Plugs
« Reply #1 on: 16.09. 2011 07:21 »
My Flash should use L82c but they tend to soot up a bit, I use L86c

Others will comment and give you a general view
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline muskrat

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Re: A7 Spark Plugs
« Reply #2 on: 16.09. 2011 10:13 »
NGK B8HS for my money. Never did like Champs.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline Goldy

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Re: A7 Spark Plugs
« Reply #3 on: 16.09. 2011 10:42 »
I always use L82C and they work fine. i never like NGK as they don,t seem to last very long.
56 A10 Golden Flash - Restore, ride, relive.                                          
56 C12 BSA project ongoing

Offline t20racerman

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Re: A7 Spark Plugs
« Reply #4 on: 16.09. 2011 19:17 »
NGK B8HS for my money. Never did like Champs.
Cheers

Me too  *smile*
1961 A10 - somewhat modified :-)
1980 TZ350 - lunatic Classic Race machine
1967 T20 Suzuki - heavily modified Classic Racer
1967 T20 Suzuki - pretty standard road bike
2007 KTM 660 SMC - fast and furious supermoto
Triumph 675 Speed triple
Ossa 250 and yet another T20 racer in bits both being built up

"If I had all the money back that I've spent on motorcycles... I'd spend it all on motorcycles!"

Online bsa-bill

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Re: A7 Spark Plugs
« Reply #5 on: 16.09. 2011 19:59 »
way hay -  a plug thread
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline wilko

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Re: A7 Spark Plugs
« Reply #6 on: 16.09. 2011 22:11 »
I don't like either, i use 2nd hand KLG's!

Online Brian

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Re: A7 Spark Plugs
« Reply #7 on: 17.09. 2011 02:32 »
Actually considering you are in the UK and are probably dealing with low octane and possibly ethanol fuel I would suggest a B6HS or a B7HS at the coldest. A L82C Champion is equivalent to a B6HS.

A B8HS as Muskrat suggested would be fine here in Aus as we get 98 octane fuel with no ethanol in it.

I know we have been over the spark plug thing a hundred times so I can only relate my personal experiences, I have been using NGK plugs for about 40 years and have found them very good. I have had a couple of duds but that would work out to about .005% of the plugs I have bought. The plugs in all my A's are the ones I put in when I put the motors together, some have done 20,000 miles. I clean and gap them whenever I think of it (not very often). So far, fingers crossed, I have never had to change one.

Online bsa-bill

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Re: A7 Spark Plugs
« Reply #8 on: 17.09. 2011 10:18 »
I've had some encouraging results with Bosch silver electrode plugs, I'm a bit uncertain about the heat range equivalence and they have a very thick wall on the threaded part which might affect the heat range, there supposed to have a wider range I think.
During my starting woes they where the the only plugs that would start  the engine at times, however there were other issues involved.
Got the plugs from The Green Plug Co, no interest in the firm other than had good service from them and a lot of info on their site
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco