Topic: Assistance with Home made electric diagram

[cakey]

I did not have anything to start with in the way of electrics with my bike. Most was either missing or been dinner for the rats. So hoping someone could double check my home made diagram. I am attempting to determine the correct wiring to  fuse block.
I have the Honda manual but I find the diagram a bit hard to read as I am not very good with the electrics but get the general gist.
What I gather is the red comes from the rectifier, goes to a switch block and then goes to a red/white wire which goes to one side of the 15amp fuse. The other side of the fuse goes to positive on the starter solenoid. the red wire from the ignition switch goes to the starter solenoid.
That's what I have been able to piece together.
My wiring loom was a mess and I have been working a week on it to get back into shape.

[brewsky]

Maybe this will help......
http://oldmanhonda.com/MC/wiring750.swf

[cakey]

Yeh thanks Brewsky I was using that duagram as well . Maybe the Australian model is different because some of the colours are different to my wiring loom. It's a red wire out of the ignition switch, not red and white and red wire out of rectifier. I can't seem to locate this combination switch. Just a bit confused mate.

[Maurice]

I use this one:



Very easy to set up minimal wires to test things out. Then good to keep because it's so simple it makes troubleshooting electrical issues a breeze.

HTH

[TwoTired]

Almost certainly have it wrong in your diagram.  But, I'm not sure which make and model bike you have.

The rectifier is at the output of the charging system is not normally fused when connected to the battery.  However, the Key switch IS supposed to be fused.

[cakey]

Almost certainly have it wrong in your diagram.  But, I'm not sure which make and model bike you have.

The rectifier is at the output of the charging system is not normally fused when connected to the battery.  However, the Key switch IS supposed to be fused.

Thanks for that TwoTired, it gives me a start and something to go by.

Not sure what pic you tried to load up !aurice, it did not load.

[cakey]

Make and model is a CB750 1971.

Having another look at that diagram and I think I was looking at it wrong. The combination switch in the diagram is the key ignition switch that I am thinking of. So that red wire to one side of fuse block and the other side of fuse block goes to red and white rectifier wire? Although my rectifier wire is just red on the rectifier and then using the OHM meter I trace it to a red and white on the loom that has the material insulation on it.

That's where I am at.

[Maurice]

Sorry man, updated it now take a look. It's a simplified diagram that's actually enough for a functional bike.

[TwoTired]

What is your goal?    Restoring to stock?  Or, having a custom one-off that only you know the wiring?

[cakey]

What is your goal?    Restoring to stock?  Or, having a custom one-off that only you know the wiring?

As close to stock as I can get it but I am using aftermarket bullet and blade connectors with after market fuse. Other than that "I think it's pretty close to stock" but not 100% sure.

Sorry man, updated it now take a look. It's a simplified diagram that's actually enough for a functional bike.

Really appreciate the diagram Maurice. Easier for a Pastrycook come Auto sparky like myself.

Here is a pick of where it is at.

[Brantley]

This is for a K0, but is close...

[cakey]

Thanks guys I think I nailed it. That diagram by Maurice was heaps easier for me to understand. On with the next piece of crap with the electrics.

The coils themselves look in really good nick but the leads are that funny I was to I embarresed to even post a pic. Each lead cut in halve and slightly twisted with another newer ice of lead just holding them together and then electric tape around the disaster.

Are the leads replaceable or is it a complete sealed unit. The end of the leads have no plugs either.

I could be up for a whole new set?

[AJK]

Hi Cakey,

If you have leads, they are replacable, but you have to remove the old leads. Someone on this forum i beleive has done this before and written up this document on how to do it.

http://www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CCkQFjAA&url=http%3A%2F%2Fforums.sohc4.net%2Findex.php%3Faction%3Ddlattach%3Btopic%3D10429.0%3Battach%3D10316&ei=-K3XUtegHcbUkQWetoHIAw&usg=AFQjCNFfDSJdiYWLGJVGPdCX9CkTGYlx7Q&bvm=bv.59568121,d.dGI


Don't be embaressed about your coils/leads. Here are mine at the bottom of this page.
http://forums.sohc4.net/index.php?topic=113480.0;all


You will probably find that your coils are just fine, but your leads and plug caps are in need of replacement. I highly recommend getting new plug caps as they tend to leak spark (can be seen at night with the bikes running).

I ended up just getting new coils and leads from CB750supply.com , but could have reused my coils without problem with a splice job. The new coils do output more though, thats why i got them.