Author Topic: spark plug grade  (Read 601 times)

Offline Signboy

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spark plug grade
« on: 20.03. 2016 22:23 »
Hi Guys, me again,
Before there's a collective  groan on a subject thats been done to death.... i need to replace the plugs in both my iron head A7's  and wondered what the correct grade is,   both at present have Champion L5s in   but is this correct ? and can you still get them ??
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Online muskrat

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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Online Greybeard

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Re: spark plug grade
« Reply #2 on: 21.03. 2016 18:18 »
I've just bought these. I hope they are OK. Seem to be equivalent to Champion L5
http://www.ebay.co.uk/itm/141910561206
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Offline Signboy

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Re: spark plug grade
« Reply #3 on: 21.03. 2016 19:08 »
cheers guys...... just found out they should be Champion L7s    are these hotter or cooler than the L5s ?   which ones do i go for ?
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Online muskrat

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Re: spark plug grade
« Reply #4 on: 21.03. 2016 19:27 »
G'day Signboy.
Champs and NGK run their heat range opposite. NGK B5HS is hotter than B8HS. Champs L5 is colder than L7.
A hot plug burns a rich mixture better when cold and on the choke BUT will be too hot at revs and normal temp.
Cheers
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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline Signboy

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Re: spark plug grade
« Reply #5 on: 21.03. 2016 22:45 »
cheers pal
 *smile*
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