Yamaha XS360 Charging Woes

kelvis

Active Member
Hi All,

Hoping somebody out there has some insight into what may be the cause of my charging issues on my '77 XS360. Here's the scenario:

- Engine has been rebuilt (runs great).
- All electrical items (horn, headlight, indicators, brake light, switches etc) work.
- Battery is fully charged.
- Stator coil resistance checks out fine (0.9 ohms).
- Feild coil resistance checks out fine (4.0 ohms).
- Bike runs, but is only running off the battery (shows 12V, does not rise with engine revs), when the lead from the battery to the fuse box is unclipped, all electrics switch off and bike stops, likewise, when battery runs low, bike begins to miss and dies out.
- Rectifier was faulty and had been replaced, but replacement has since failed.
- Regulator resistance tests at 112 ohms, apparently normal is 10.5 ohms.

So with all of this, my uneducated guess is that the regulator is faulty, but could this be the cause of the failed rectifier? I am hoping that purchasing a replacement rectifier and regulator that the issue will be sorted!

I am nearing the end of my build and this is one of the last major issues I have to contend with, any thoughts/ideas would be great!

Cheers.
 
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