Quick question: Battery Size '71 Commando

Folks. I just need to verify the battery size for a 1971 750 Commando. It was my bike back in the 90's, but I have no recollection of the size/type. The owner, a good friend, passed away last year, and his sons are getting the Commando running for a memorial run soon. The battery in my 850 is a 12N9-B4. Is that also correct for a '71 Commando?

Thank you.
Russ

Its correct for the 72 year. If you have the retaining bar and the two battery straps that hold the battery down, then that battery should be correct. I don't have a 71 so I am not 100% siure.
Cheers,
Tom

998cc said:

The battery in my 850 is a 12N9-B4. Is that also correct for a '71 Commando?

Click to expand...

12N9 4B-1, '68 - '74. (Originally, Lucas PUZ5A).
"
5 5⁄16 in. x 3 in. x 5 1⁄2 in.

Norton...750...Ranger, Commando...All Years[not 850 Mk3]...12N9-4B-1"

Also,
YB9-B.

thanks Les.
Cheers,
Tom

Thank you gentlemen. Also thanks for the "4B"correction. aixelsyD! The bike received a new battery, new tires, podtronics, carb bits, speedo drive clean and lube, etc. Engine and gearbox were rebuilt perhaps a thousand miles ago (but maybe 10-12 years) by John Proto, a local fetteler of many Nortons and other English machinery. Though it has been sitting a long time, it runs very well. They ultimately did not take it on the memorial ride yesterday after they discovered a few other minor problems.

Best regards,
Russ

Work this out... one step or problem at a time.

As LAB mentioned, this is the original Lucas battery that was in my ‘72 750. No it isn’t functional. I just keep it as an example.

"As LAB mentioned, this is the original Lucas battery that was in my ‘72 750. No it isn’t functional. I just keep it as an example."

Someone on another forum I recently ran across is a fanatic for "originality." He took an old battery (obviously long- dead) that would have been OEM in his 1969 426 Hemi Plymouth Road Runner, gutted it from the bottom and replaced the guts with a Lithium battery so as to have a working 'original battery' that came in his car. Seems a bit OTT to me but hey, we all do what we like to do!