6 replies to this topic

[bigian]

Hello,

I am looking to do the upcoming Lands end trial on my 75 Ossa Mar. I will have to put lights on the bike for a full MOT. Can anyone help with some sort of simpe Wiring diagram.

It currently runs with Motoplat Ignition which gives me 5 wires Black and Blue which are for the coil, But have not much idea which of the other wires to use for which lights.

I have a green,red and white wires coming from the stator.

Will i have to use some sort of A/C converter to stop the bulbs from blowing. I really don't want to run a battery.

Any help would be great.

Cheers, Ian

[chaindrive]

did you find a wiring diagram ? I have one but not sure how to attach it

[RonWright]

I have an Ossa SDR which I am rebuilding - the wiring harness is missing. Did the owner of the MAR succeed in getting a simple wiring diagram - can he share it with me

[Stecks]

will this help...? Peter

[RonWright]

Peter - thanks but my magneto has 5 wires coming from it - the blue and black ones power the coil which leaves 2 yellow and 1 red remaining ?

[Stecks]

RonWright, on 09 December 2011 - 05:02 PM, said:

Peter - thanks but my magneto has 5 wires coming from it - the blue and black ones power the coil which leaves 2 yellow and 1 red remaining ?

Sorry. Not been on for a while. I am no expert, but I suspect the Explorer didn't use a battery, perhaps to keep the weight (and the expense) down... and so the extra wires may have run the lights directly...? Can you put a meter on the wires in question to see what output they are giving with the motor running and perhaps work it out from there? The diagram I posted shows a battery in the system. A steady feed through a switch, through the bulb and down to earth should put a bit of light on the matter... It would need a headlinght, a tail light, and a brake light switch. Could these three be fed by the three extra feeds? Unless anyone else has any suggestions...?

[Greenwing]

I have had similar difficulties in reconstituting the lights on my 1972 MAR. All the original wiring has been stripped so I am starting from there. What I have noted is that there are 5 wires coming from the motoplat, blue, black, whit red and green. The blue and black go to the coil which would seem correct as the bike starts and runs very nicely. There was no provisions for a battery in this bake, no voltage regulator and such. I assume the lights ran of unrectified AC power. From what I have been able to infer from my investigations are that the white wire might supply power to the headlight, the red wire might power the tail light and the green might power the brake light ( though I see to accommodations for a brake light switch). I assume the power return is through the frame and engine back to the motoplat.

I have been unable to find any corroborating information for my observations. Would any one be willing to enlighten me?