Battery / Starter motor cable size

S

Smartv11

Full member
Location
Meopham, Kent
Will be changing cable to starter motor and would like to check sizes;

Considering - 'A flexible Black battery earth or power cable supplied with heat shrink wrapped hexagonally crimped copper ring terminals. Cable is 8.3 mm diameter (16 mm squared cross section) 450mm in length and is rated @ 110 Amps'

Any problems with this choice?

Paul
 
BTW, pretty good thing to have a cable of same size running from starter motor mounting lug to battery ground. I have installed 10 sqmm arc welding ground cable for the starter motor wiring, works nicely, and the insulation of welding cable is very capable to whitstand a good portion of heat, as well as thee occasional douse with fuel/oil. It's usually also cheaper to source at the welding consumables shop than on any other place selling you dedicated 'battery cable'.
 
Agree the biggest gable (They're not all that long) and routs easily using Hi-Grade Terminals.

About any small Industrial Solenoid will work - Just ground the Solenoid through the Transmission Neutral Switch after the handle bar Start Switch is engaged if you want to prevent the Stater Motor from spinning into Ash.

Don't trust the the Dogs in the Starter Clutch.
 
Gravelroad said:
BTW, pretty good thing to have a cable of same size running from starter motor mounting lug to battery ground. I have installed 10 sqmm arc welding ground cable for the starter motor wiring, works nicely, and the insulation of welding cable is very capable to whitstand a good portion of heat, as well as thee occasional douse with fuel/oil. It's usually also cheaper to source at the welding consumables shop than on any other place selling you dedicated 'battery cable'.
Click to expand...

Photo please, can't quite picture it?

Paul
 
Second photo shows the ground wire at the engine case w/o starter motor being installed.

 

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So the cable goes to the battery negative terminal or an earth point?

and how and under what circumstances does this protect the starter motor?

thanks for photos

Paul
 
I can't see a reference to this modification, "protecting" the starter motor Paul, but I am sure that if you use a decent OFC Cable, then it will most certainly sound better. Linn or Naim would be acceptable, or anything similar, but don't use Monster, that is not pure enough and only a sales gimmick to increase profit margins.
 
Smartv11 said:
So the cable goes to the battery negative terminal or an earth point?

and how and under what circumstances does this protect the starter motor?

thanks for photos

Paul
Click to expand...
Hi Paul, the cable goes to the battery negative terminal, and is first hand not intended to protect but to give max grunt to the starter motor. Any connection, even with small resistance, will lead to a voltage drop at the rather high currents that are flowing through this circuit.

With original setup, there are 5 connections involved to provide ground for the starter motor:
-starter motor casing to starter motor bolt
-starter motor bolt to engine casing
-engine casing to frame
-frame to ground strap
-ground strap to battery negative terminal

With the ground cable going directly to the starter motor, only 2 connections left:
-starter motor casing to ground cable
-ground cable to battery negative terminal

Regards,
Stefan



 
"particularly relevant with a powder coated frame getting in the way of this circuit"
Exactly. If there ends up with poor contact anywhere in this chain the electrons will find the path of least resistance, I have seen throttle cable melted on a car, tacho cable on a bike likewise. Not a bad idea at all to have a dedicated earth lead.
 
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