Wiring Harness for a 1978 XS650

[650Skull]

Didn't actually see a date just the xs650 SE.

Coming from Ireland you need to identify the bike by the vin no. It will be on the Vin plate/sticker on the head-stock and stamped on the head-stock as well. This behind the headlight and a matching # should be on the front of the engine to the left of the oil tube, going to the head, when looking at the engine from the front.................If you have the Euro US Custom it will be different to the US models. The Euro US Custom never got the Factory TCI ignition, points only, that is why your safety relay is a short fat one, same as in post #6.

On the left bar switch you should have a Pass/flash switch as well. US models never got this...............Pic from my 80SG Oceania model. We also never got the Factory Electronic ignition, (TCI).............. Points only. Need a condenser pack on points bikes

 

[650Skull]

Put this together, from the Manual, with the Component key for the 79SE 3L1-000101 and on UK, wiring diagram.

UK models also have 4 wires and an extra key position for Park, in the ignition Switch, + the on/off light switch on right bar switch a well as left bar switch as in the post above.

 

[yam-a-ha]

The "brass box" is the earlier version of the double safety relay with two relays under one single large cover. I saw the pics of yours in your thread. That's a later style with individual, separate covers on the two relays. Are you sure your bike is a '78 model? Do you have the headlight on-off switch on your right handlebar control? .....

View attachment 251785

yes. same switch as pic.

 

[yam-a-ha]

Coming from Ireland you need to identify the bike by the vin no. It will be on the Vin plate/sticker on the head-stock and stamped on the head-stock as well. This behind the headlight and a matching # should be on the front of the engine to the left of the oil tube, going to the head, when looking at the engine from the front.................If you have the Euro US Custom it will be different to the US models. The Euro US Custom never got the Factory TCI ignition, points only, that is why your safety relay is a short fat one, same as in post #6.

On the left bar switch you should have a Pass/flash switch as well. US models never got this...............Pic from my 80SG Oceania model. We also never got the Factory Electronic ignition, (TCI).............. Points only. Need a condenser pack on points bikes

View attachment 251815

yes have headlight on off switch on right handlebar,has pass switch on the left bar also.

 

[yam-a-ha]

Coming from Ireland you need to identify the bike by the vin no. It will be on the Vin plate/sticker on the head-stock and stamped on the head-stock as well. This behind the headlight and a matching # should be on the front of the engine to the left of the oil tube, going to the head, when looking at the engine from the front.................If you have the Euro US Custom it will be different to the US models. The Euro US Custom never got the Factory TCI ignition, points only, that is why your safety relay is a short fat one, same as in post #6.

On the left bar switch you should have a Pass/flash switch as well. US models never got this...............Pic from my 80SG Oceania model. We also never got the Factory Electronic ignition, (TCI).............. Points only. Need a condenser pack on points bikes

View attachment 251815

 

[650Skull]

View attachment 251860View attachment 251861

UK/Euro 79SE 3L1-******.

Finished the wiring diagram. @Jan_P , gotta worm bugging me in my mind thinking the 3L1 has a single fuse and not the glass bank of 4. Could you check and confirm the fuse/s.

@yam-a-ha post some pics of the bike. Haven't had many, if any at all, of the Early 3L1's on the site before

 

[yam-a-ha]

UK/Euro 79SE 3L1-******.

Finished the wiring diagram. @Jan_P , gotta worm bugging me in my mind thinking the 3L1 has a single fuse and not the glass bank of 4. Could you check and confirm the fuse/s.

@yam-a-ha post some pics of the bike. Haven't had many, if any at all, of the Early 3L1's on the site before

has a bank of 4 fuses. will post pics.

 

[Jan_P]

UK/Euro 79SE 3L1-******.

Finished the wiring diagram. @Jan_P , gotta worm bugging me in my mind thinking the 3L1 has a single fuse and not the glass bank of 4. Could you check and confirm the fuse/s.

@yam-a-ha post some pics of the bike. Haven't had many, if any at all, of the Early 3L1's on the site before

Sir
4 glass fuses on both mine was sold as 80 models .But I believe manufactured 1979

--3L1-0240** ---
--3L1-0209** ---

Have hand written note with a pencil from many years back not sure if Right saying
XS 650 SE 79-80 maybe also SG
in the vehicle title it is Se Yamaha 3l1 Xs 650Se
4G7
3L1-020101 ---040000

 

[650Skull]

That diagram should be right then Thought you had the 4G7 3L1 80SE. Cheers

 

[yam-a-ha]

has a bank of 4 fuses. will post pics.