The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Lucas, Ignition, Charging, Electrical => Topic started by: greeneunos on 30.08. 2022 20:12

Title: Spark plugs A7 shooting star 1960
Post by: greeneunos on 30.08. 2022 20:12

Hi
Thanks again for the help with my kick start spring all sorted now , can someone please recommend the best spark plugs for my 500 A7 Shooting star. 1960  , it tends to run a bit rich at present , thanks Mike

Title: Re: Spark plugs A7 shooting star 1960
Post by: muskrat on 30.08. 2022 21:01

G'day Mike.
Try running a hotter plug. I use NGK B7ES so try B6ES or even a B5ES but I wouldn't go any hotter unless your going to Iceland.
I've just started using BP7ES in my 57 SS top end on 51 plunger bottom. Working well.
Cheers

Title: Re: Spark plugs A7 shooting star 1960
Post by: berger on 30.08. 2022 23:25

B7ES are the ones i use in my ss and they work well

Title: Re: Spark plugs A7 shooting star 1960
Post by: greeneunos on 31.08. 2022 06:32

Thanks for the info   Have ordered today
Cheers Mike

Title: Re: Spark plugs A7 shooting star 1960
Post by: Magista on 06.05. 2023 20:47

What is the difference between the B7HS and B7ES?

It looks like the thread is longer on the B7ES.

Title: Re: Spark plugs A7 shooting star 1960
Post by: Black Sheep on 06.05. 2023 21:18

B7HS 1/2" reach. B7ES 3/4" reach. For spark plug comparison tables, take a look at the Green Spark Plug Co website.

Title: Re: Spark plugs A7 shooting star 1960
Post by: Magista on 06.05. 2023 23:36

Right. I guess my question was, "Why use one over the other?" Using the magic of the Googles I answered my own question.

Title: Re: Spark plugs A7 shooting star 1960
Post by: Triton Thrasher on 07.05. 2023 09:24

Quote from: greeneunos on 30.08. 2022 20:12

it tends to run a bit rich at present , thanks Mike

Trying to remedy a mixture problem with hotter plugs can lead to holes in pistons.

Have you renewed the needle jet?