How to tell between a 76 and 77 model?

[Paleomechanic]

Hey everyone, happy Easter!
So, my regi is wrong , I know that. I’ve got what appears to me, a 76.
I’m asking as I have to order a wire harness from Mike’s xs, and I would like to make sure I have the right one on order
I had one on order from Asylum, but I have to source from a different supplier… yeah . Not super good .
So, if anyone can show me a “tell” on a 76 vs. 77, that would be helpful !

Thanks in advance
Nick

 

[5twins]

Biggest "tell" will be the front fork and front disc and MC. The '76 model was the last year for the 34mm fork (tube diameter) and the early 2 piston caliper. Also, the MC with the round fluid reservoir.

 

[Paleomechanic]

76 then

Thanks !!

 

[Wingedwheel]

Stock bike? You can check the serial #’s on the site.

 

[Paleomechanic]

Stock bike? You can check the serial #’s on the site.

Not stock unfortunately
The serial matches a 71….
Yeah, it’s complicated lol
PO had it registered this way …

 

[Wingedwheel]

What’s the serial # on the engine? Match the frame?

 

[Paleomechanic]

Nope

 

[650Skull]

post up some pics or have a look here at the different models. Basically the change was a new front end from fork size, (internals as well). to the caliper an brake rotor
https://www.xs650.com/threads/xs650...workshop-manuals-and-other-information.30569/

When it comes to the wiring there isn't much difference Mainly the gauge set up and 77 was the first year the headlight was set up with a fail safe circuit