First time rehab of a 1976ish basket case

Should I cut down front fender or leave it?


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Gotcha.......yea that will make you learn........go to the "Tech menu"......"Electrical" ........"wiring looms"........and scroll down and check out the XS2 wiring diagram for a simple wiring loom.......Ask some questions pertaining to the safety relay set up...........Yamaha did an after thought on the wiring, to and from the coils to the safety relay when they introduced the Electric start..................
Thanks, I’ve done a bunch of poking around in there, but unfortunately nothing really applies to this bike (it’s only an xs2 on paper) and I’ve omitted dummy lights and safety relay, but looking over all the different diagrams has helped me make sense of some of the basics of the system. They’re all bookmarked and get clicked on at least a few times whenever I step into the garage
 
Greasy, I just started watching this thread, I'd offer you some bits and pieces off a 1972 but Mailman has snagged most of the good stuff:D

I do have some odds and ends of other year bikes that may be of some help if you are not worried about being 100% original!

Just noticed you are in Spencer NY. Up till a few moths back I had never heard of the place. But a couple friends of ours bought an old farm house and barn down that way right on 34.
No kidding! If they’re on 34 in spencer they can’t be more than a mile or two from me. Small, small world. For all I know we might be neighbors, I also live in an old farm house. You’ll be at the top of the list when I start breaking more stuff in the process! Thanks for dropping in man
 
Revisit that XS2 diagram..............only updated a couple of weeks ago with a total rework and a final finish off a couple of days ago..........doesn't matter that it's for an XS2 because your rewiring, it can be used for any bike and the early bikes didn't have all the relays they introduced in 74/75 and later.........just an update, it may help
 
Revisit that XS2 diagram..............only updated a couple of weeks ago with a total rework and a final finish off a couple of days ago..........doesn't matter that it's for an XS2 because your rewiring, it can be used for any bike and the early bikes didn't have all the relays they introduced in 74/75 and later.........just an update, it may help
Awesome man, I’ll give it a thorough look over on break and see how it lines up when i get home. It helped before when I was wiring ignition and charging, and I’m sure it’ll help again
 
Well, I couldn’t wait and threw my tank on real quick to see if she’d turn over and if my alternator was putting out any juice, and it is, but seems like just barely? This was on a not-fully-charged battery so not a great test, but bike growls louder, number gets bigger right? Caveman brain says good...
Link to video at bottom
Also, I know the bike sounds terrible right now. Carbs were rebuilt and rejetted, bench synced by eyeball only and NO tuning has been done yet. Bike still needs valve adjustments (obviously), timing work, and probably some fresh brushes but I’m trying to stay on track with the wiring here.

 
Yeah.... it's not charging. Revved it should put out about 14 and a half volts.
Didn’t think so. I mean it’s not NOT charging! That will be next on the list. New tridon flasher relay in the mail, plan to finish wiring/loom assembly/routing after work over the next several days. After that I’ll start troubleshooting alternator.
 
Hey... at least it runs.

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Hey... at least it runs.

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Thanks Jim. I was honestly shocked when it came to life after 2 primers and one good kick, then kept chugging. Idle anywhere from what sounded like a few hundred up to 2000, backfiring, popping and spitting out the carbs, intermittently losing spark completely on one side, but running none the less. It’ll all get addressed.. one thing at a time..
 
Yeah.... it's not charging. Revved it should put out about 14 and a half volts.
Well, usually being dumb makes fixing things way harder. In this case, being dumb made me miss something small that in turn made the fix really easy.. I’ll elaborate. Stumbling through the charging stystem guide in the tech section I read the step involving checking power from ignition (brown wire), and long story short remember that the original wire from regulator (reg/rec?) looked suspect and sure enough, pulled it back and spliced in some fresh wire and I’ve got full charge! Linked is a video, am I just getting high voltage because there’s no load (lights, etc) on the system yet?
 
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No, now you're over-charging, lol. It should never go above about the mid 14's. Your regulator may be bad. That's the component that's supposed to control that output.
 
No, now you're over-charging, lol. It should never go above about the mid 14's. Your regulator may be bad. That's the component that's supposed to control that output.
Yeah that sounds about right :doh:
in the clymer manual, 14.5-15 is within spec. It wouldn’t be the first wrong info in here, but that’s what it says in case anyone’s wondering (I’m still out of spec)
 

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Yup. Prolly stuck and putting constant power into rotor. I'd just get rid of it. If your nice, maybe 5Twins will share his knowledge of making your own reg/rec. ;)
 
Yup. Prolly stuck and putting constant power into rotor. I'd just get rid of it. If your nice, maybe 5Twins will share his knowledge of making your own reg/rec. ;)
So you think it’s beyond the point of adjustment and worth replacing with a combo unit? If that’s the case, I’ll be scouring the forums for a write up so I can at least approach him with specific questions :poke:
 
Greasy,

Like Khanson, I just discovered your thread this afternoon, and have been doing a read-thru.
I'm enjoying your postings and your humour.

I'm 90 minutes NW of you on Otisco Lake, but I frequent your town when I ride the Southern Tier, as it is a crossroads.
I always stop at Parkview Pizzeria for a slice, and bring it over to one of the benches on the pond to chow down.

Dean Creek is one of my all-time favorite twisty country roads.

Looking forward to following your progress !

Dude
 
Greasy,

Like Khanson, I just discovered your thread this afternoon, and have been doing a read-thru.
I'm enjoying your postings and your humour.

I'm 90 minutes NW of you on Otisco Lake, but I frequent your town when I ride the Southern Tier, as it is a crossroads.
I always stop at Parkview Pizzeria for a slice, and bring it over to one of the benches on the pond to chow down.

Dean Creek is one of my all-time favorite twisty country roads.

Looking forward to following your progress !

Dude
No kidding! We fished the Otisco spillway for musky a few times last year! Well, come spring time you’ve got a new local riding buddy. I’ll bring the fishing gear if you bring the tow-rope :cheers:
 
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