Author Topic: what plugs  (Read 803 times)

Offline townsends20

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what plugs
« on: 25.09. 2011 22:03 »
Hi Guy's
    this bike gets better as I am getting these things sorted out. I need to know the best plugs to use I am using ngk's bpr6es-11 as I seem to have a stock of these and the bike is going fine on these although I am still running in, it is on a competition mag I don't know if that makes a difference here is a few pics. of the bike so far.     

1962 rgs

Online chaterlea25

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Re: what plugs
« Reply #1 on: 25.09. 2011 23:12 »
Hi townsends20,
Plugs with "R" in the code are resistor types,
these are not really suitable for magneto ignition
Plain old B6's or 7's or if you want ES's (long nose)

others swear by or at these or champions *conf* *conf* *conf*

HTH
John O R
1961 Super Rocket
1963 RGS (ongoing)

Offline mike667

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Re: what plugs
« Reply #2 on: 26.09. 2011 00:53 »
thats a beauty!

Online muskrat

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Re: what plugs
« Reply #3 on: 26.09. 2011 09:25 »
That's one beautiful bike mate. I love those tanks. Not sure I could ride with the bars that way, I'd need to flip'em over to slope down a bit.
NGK B7 or 8ES is my choice.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Online bsa-bill

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Re: what plugs
« Reply #4 on: 26.09. 2011 09:34 »
If it's not getting pre-ignition when up to running temp then use BP6ES but ditch the BPR6ES, seems to be pretty universal that they don't do Maggies much good as John states.
my Maggie is (was) suspect so I've been dabbling with plugs and found  Bosch thin wire platinum to provide a better spark for starting than Champion Ns or NGK BPs however both these marks also make thin wire plugs so maybe I'm being a bit unfair
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 townsends20

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Re: what plugs
« Reply #5 on: 26.09. 2011 19:09 »
Hi Muskrat / Bill & all
       It  seems to to be a matter of choice as to what plugs to use,( except  resistor type) the main thing for me is not to hole the pistons or burn out the valves with 10.5 to1 pistons what would be the safest plugs to use?
           On another note I am going to downturn the bars later when I get more comfortable, it started out with clip-on with an alloy headstock, then I  went to ace bars and that's before I even got on it! Then I said to myself who are you trying to kid. Yes I ain't getting any younger you know what I mean. And don't forget its been 35+ years for me and the bike.
   All the best Steve.  *conf*
1962 rgs

Online bsa-bill

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Re: what plugs
« Reply #6 on: 26.09. 2011 20:04 »
never mind the bike Steve, that is one mean looking trolley *smiley4*

As for plugs (remembering apart from providing a spark a plugs main job is to transfer heat from combustion chamber to head and thence to the atmosphere) best to start with a cold plug and work up if they foul, even at today's prices plugs are not too expensive, especially the ones for our old bikes.

Should I admit that I recall plugs stuck at 3 shillings and six pence for what seemed decades ;)
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 duTch

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Re: what plugs
« Reply #7 on: 18.10. 2011 12:41 »
no
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia