The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Lucas, Ignition, Charging, Electrical => Topic started by: trevinoz on 11.11. 2022 21:46

Title: Big Valve Instruments
Post by: trevinoz on 11.11. 2022 21:46

This is a 1963 Big Valve Super Rocket which was recently imported into Australia from the U.S. It had Illinois registration, the plate is still on it.
Note the 140 MPH speedo and the window type ammeter. Also has filler plugs in the fork top nuts.
The headlight switch is the early type but I thought that the 41SA switch should be fitted, but I could be wrong.
It has the late barrel with the fancy front fins.
All up, pretty original.

Title: Re: Big Valve Instruments
Post by: chaterlea25 on 12.11. 2022 00:10

Hi Trev,

Quote

Also has filler plugs in the fork top nuts.

Its more than likely it has the "Dow" dampers fitted ?

Great looking bike
John

Title: Re: Big Valve Instruments
Post by: trevinoz on 12.11. 2022 21:45

No John, the American models have filler plugs. I will post pictures later.

Title: Re: Big Valve Instruments
Post by: trevinoz on 13.11. 2022 22:09

As promised, top nuts with filler plugs.
The plugs are 5/16 x 26 and are chrome plated brass.

Title: Re: Big Valve Instruments
Post by: Jules on 14.11. 2022 01:05

Very nice looking machine Trev, obviously been well restored (over there?), how did you come across it??

Title: Re: Big Valve Instruments
Post by: sean on 14.11. 2022 02:14

I have a  1962 super rocket has the same round tank  badges .....I have been told  they are supposed to have a tear drop badge .....

Title: Re: Big Valve Instruments
Post by: Rex on 14.11. 2022 08:54

"Window ammeter"?

Title: Re: Big Valve Instruments
Post by: RichardL on 14.11. 2022 15:34

Very nice. Never saw it in my own ramblings around northern Illinois.

Richard L.

Title: Re: Big Valve Instruments
Post by: trevinoz on 14.11. 2022 20:33

Sean, the tank badges on the 2 gallon tank should be round.
Rex, I call that type of ammeter the "window" because the needle is behind the face and is viewed through a window in the face.
Jules, a friend of mine who has a restoration business is doing some work on it. I don't know that it has been restored as it is a low mileage bike.

Title: Re: Big Valve Instruments
Post by: chaterlea25 on 14.11. 2022 22:09

Hi Trev
Thanks, everyday's a school day  *ex*

John

Title: Re: Big Valve Instruments
Post by: Jules on 14.11. 2022 23:48

thanks for sharing Trev, the "window" viewpoint is interesting and I note the mileage is only 10,500, if its genuine/unrestored thats a true "barn find" LoL cheers