Replacing battery cables on 75 Commando.

Dunno but mine are nice n' thick .
Electricity is like flowing water , It does not like a dam or restriction . Particularly with a starter motor drawing big amps suddenly on demand . Lead acid battery with a high cranking rating , I use gold plated large connectors .
 
FWIW, some years ago a friend replaced the starter cables on his stock Mark III with larger ones and his previously reluctant (unmodified) starter has worked with no issues at all ever since. So it appears it's a worthwhile thing to do!
 
MexicoMike said:
FWIW, some years ago a friend replaced the starter cables on his stock Mark III with larger ones and his previously reluctant (unmodified) starter has worked with no issues at all ever since. So it appears it's a worthwhile thing to do!
Click to expand...
Also mentioned in this video about starter motor upgrades at about 11 minutes in…

 
Matt from Colorado Norton Works supplies #6 gauge cables with his electric start kit to connect directly to the battery. This is a very heavy duty starter.
 
My Norton is a Mk 1, so kick only; but on electric starter bikes (which is all the rest....) I use 4 gauge. That is almost certainly overkill but as MexicoMike commented, the difference in makes in starting ease and time is remarkable.

I get mine from a place that sells welding cable and terminal ends (plus little solder slugs) so you can make your own to spec length - which is incredibly easy if you have a propane torch, maybe even works with a good heavy duty soldering iron.
 
I used 4 gauge for my mk3 that I made up from materials purchased at the local farm supply store. No starter upgrade and it cranks over with no problem.
 
I have had good luck with 6 gauge marine battery cable and heavy duty connectors.
 
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