[valiantbultaco]

Hey there peoples,

I Just purchased my first triumph!!!! A 1971 T120R.
Could any give me and rewiring tips whatsoever or a copy of the wiring diagram.

My bike is a total restoration and even though my dad is a retired mechanic from the 60's, he is freaking out with the wiring.

Any help or tips would be greatly appreciated.

also this might take the stupid question awards...where is the frame numbers???

Thanks for your time.

 

[Cichlid865]

I'm fairly new too & just bought a '75 t140 - There's heaps of wiring diagrams on the net, there's an ebay seller who offers coloured diagrams, not sure what the quality's like. I imagine you 'need it now' anyway. I ordered a workshop manual the other day from an ebay seller, $24.00US I'll let you know what it's like when it comes.

 

[KADUTZ]

shop manuals have wiring diagrams I prefer the factory manual for the bike but they arent cheap

VIN number on frame is drive side up near stearing head area on angular down tube.

VIN number on engine on drive side where barrel meets engine block on a raised pad
engine & frame number should be the same a 71 should
be alpha letter then E followd by 5 numbers and a model ID
(example AE 12345 T120R)








9

 

[GrandPaulZ]

Just remember that the electrical system utilizes POSITIVE GROUND.

All Red wires go to ground.

Bonnies are some of the simplest bikes to wire if you understand electricity and principles.

ENJOY!

 

[DAGAD]

Good words Guys, worth thinking about also is the modern components available to use; Boyer or RITA ignition, combined regulator / rectifier and there are some good, cheap twin spark single coils out there. Halogen bulbs etc.
UNLESS you want to make it original of course?
Roy.

 

[johnnypence]

valiantbutalco,

the wiring diagrams in a hayne's manual are pretty close to being good enough. i HATE that kind of fiddly fingertip work, but i can muddle through it reasonably well with the hayne's. the only problem there is that it doesn't illustrate turn signals for my model, but you can figure that out on your own.

but somebody on this list sent me a link for a wall-size poster once. that would be nice too.

i just got done rewiring my tail/brake light, but have had to redo all turn signals, the horn, handlebar switches, the boyer box and coils, and one or two other things. if you'll be doing test rides, carry a knife, electrical tape, and a few wire nuts with you for the time being.

just take your time, think about the circuit, test it before you make it permanent, solder connections, don't get impatient, pull every connection before you walk away, turn the power off before you go inside for the night -- these are pieces of advice that i wish i followed every time...

[ This message was edited by: johnnypence on 2006-11-20 07:29 ]

 

[GulfCoastDave]

My 2 cents worth... definitely best to solder all connections and check continuity as you go. Do not trust the old "barrel & bullet" connectors. They corrode inside and can cause intermittant non-connectivity.

As for the diagram... if you think you are going to stay with this hobby... best to buy the factory manual and factory parts books. I have Haynes also and I found it to be inaccurate in many respects. I don't even use it anymore.

I second what Dagad said about electronic ignition... it makes a WORLD of difference... in ease of maintenance (none) and performance boost (big).
Best regards,
GCoast Dave

 

[KADUTZ]

OH MY MY JOHNNYPENCE HAS GONE OUTLAW ON US

OH WELL YO HOHO AND A BOTTLE OF RUM

 

[valiantbultaco]

hey peoples,

thanks for the feedback and the great tips. I have ordered the handbooks and will keep you posted on how the rewiring pans out.

cheers.

 

[Mecchanica]

You picked the absolute worst British bike to break into electrical repair. The 71-72s had more wires than any two earlier bikes.....And the main harness is in two (or was it three) parts with a huge bundle of wires under the tank. OH well, too late for that. Now you have to hope that the parts are stock and no one has been hacking on the harness. If it's and original, consider a new one....or three, or whatever.....all new wires, if you are going stock.