Author Topic: earth cable  (Read 4326 times)

Offline Graeme77

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earth cable
« on: March 17, 2015, 08:07:48 PM »
Starting to put my bike back together and cant remember where the earth cable went. I know it goes on the top rear engine bolt, but outside frame or between frame and engine?
Also, has anyone got any pics of a tidy standard electrics/battery area?

Mine is an f1 if it makes a difference.

Offline mike the bike

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Re: earth cable
« Reply #1 on: March 17, 2015, 10:08:44 PM »
Inside the frame
Where's that 10mm socket got to?

Offline martin_uk

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Re: earth cable
« Reply #2 on: March 17, 2015, 10:09:03 PM »
I believe it is between engine and mounting bracket
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Offline dieffe

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Re: earth cable
« Reply #3 on: March 17, 2015, 10:11:32 PM »
The earth goes between the frame and the engine as you said on the top left hand side.

Offline Graeme77

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Re: earth cable
« Reply #4 on: March 17, 2015, 10:24:50 PM »
Thanks. I thought it probably would do but I found pics on the internet both ways.

Online Bryanj

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Re: earth cable
« Reply #5 on: March 18, 2015, 07:58:30 AM »
Either way you need to make sure there is no paint/powdercoat where the bracket touches the lead/engine

Offline martin_uk

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Re: earth cable
« Reply #6 on: March 18, 2015, 08:56:02 AM »
I believe it is between engine and mounting bracket

Mine is on right side, guess it depends on length of cable
1977 CB750F1
1977 CB750f1 836
1978 CB750F1
1975 CB500K1

Triumph Street Triple 675R
Ducati 800 Icon Scrambler
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AJS 350 mod16
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Offline Graeme77

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Re: earth cable
« Reply #7 on: March 18, 2015, 07:44:29 PM »
I seem to have another earth cable left over. Its about 5" long and bent in a U shape. Cant find it in parts book, anyone know where it went?
Also, the rectifier, does this connect to ground through the frame? Wondering if I need to remove any paint where it mounts.

Thanks.

Offline martin_uk

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Re: earth cable
« Reply #8 on: March 18, 2015, 10:22:23 PM »
Rectifier needs to be earthed at mounting point, I normally add an extra earth lead to be sure.
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1977 CB750f1 836
1978 CB750F1
1975 CB500K1

Triumph Street Triple 675R
Ducati 800 Icon Scrambler
Triumph 3TA
AJS 350 mod16
BSA BantamD1
Honda C90zz
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BSA WD B40 350

Offline Graeme77

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Re: earth cable
« Reply #9 on: March 19, 2015, 09:07:33 AM »
I was thinking about the rectifier.
Surely it cant earth through the mount as the whole battery box is insulated from the frame by the mounting rubbers.

Offline tom400f

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Re: earth cable
« Reply #10 on: March 19, 2015, 11:00:05 AM »
Is there not an earthing wire for the battery box that goes under one of the mount screws?
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Offline Graeme77

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Re: earth cable
« Reply #11 on: March 19, 2015, 11:35:19 AM »
Maybe, maybe thats what my extra cable is for. Where does it go?

Offline Lobo

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Re: earth cable
« Reply #12 on: March 19, 2015, 11:46:46 AM »
Hi Graeme,

Unsure... assume we're talking 750 K series? (I am!)

I can't find any specifics as to the positioning of the main frame earth, but for ease of servicing have bolted mine on the outside of the mounting bolt. In my pic below it is taped up ...

Might be confused (ie myself), but your rectifier is earthed via its connector plug into the loom of the bike. (Green). This green then appears elsewhere and is bolted to the frame - LHS panel, top LHS.) See attached pic with single scrawled circle. Its a REALLY CRAPPY photo - sorry - but there is a (green) earth eyelet bolted (outside) and going (initially) vertically down before looping up to the right. (& nothing to do with the #1)

Your spare 5" earth cable... is it a heavy duty one.... and actually the +ve from the battery to the solenoid?

A pic of my K2s battery area, fairly accurate methinks.
Simon
« Last Edit: March 19, 2015, 11:55:33 AM by Lobo »

Offline Graeme77

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Re: earth cable
« Reply #13 on: March 19, 2015, 11:59:54 AM »
My bike is an f1.
The rectifier does earth through a green wire though. The only place I can see that green connectsbto the frame is up by the coils.

I have the solenoid to battery cable fitted. The spare cable is just like that one but has set in a u shape. Maybe its not stock.

Offline Graeme77

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Re: earth cable
« Reply #14 on: March 19, 2015, 12:01:42 PM »
This is the cable.

 

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