Hi looking for a battery for my Dads Norton 650 1963. I've already ordered a battery but its to big.
any help would be great?
The minimum is 5ahr which would go in the Nortoin Battery box quite easy. 7 Ahr or 9Ahr if you can get it in. Traditional lead acid is what the machine was designed for, there is several new battery manufacture types, as long as the seller can confirm the battery is fit for Automotive use then you have some guarantee. What is not recommended is any battery from the alarm world, sealed with very square corners and flat spade terminals, these will tend to overcharge and dry out.
You can use a 12 volt 9 ahr battery. More Ahr is better.
The standard type is 12n9-4B-1, dimesions 135 x 75 x 139 mm. Yuasa has a better than standard type which is YB9-B.
My bracket for the battery is non standard
Thank for the advice I’ll look into it.