The new life of a 72' XS II - Build thread

I finished my my masters degree, with a pretty cool project, according to me, in collaboration with Yamaha Scandinavia, on making their CP3 platform more inclusive for female and shorter male riders, by introducing an adjustable subframe - a lot more complex than it sounds.

Anyway, I figured I had to get my motor back on the road as I had to give back the MT09 Yamaha let me borrow for prototyping.
I soldered and glued the regulator and the rectifier, to hopefully avoid any costly un-rattling in the future.

I also made a bracket to hold the air filter boxes, to get stress off the intake boots.

Connected a new battery and there was power throughout the system, but no spark…

I think I might have fright my Boyer ignition…

I am reading 12 V on the wires going into the blue ignition box, but nothing happens when I kick, when I try to join the stator plate wires going out of the ignition unit, I get nothing.
View attachment 353210View attachment 353212View attachment 353211
This could be because the coil might be toasted with an extra side of coal, I am reading 0.6 ohms on the primary side and 8.39 k ohms on the secondary side (17,5 k ohms at caps), when it should be 2.7 K ohms as far as I read.

But I guess there’s no way to know if the ignition box is OK without buying a new coil…
Though I fear I might need to replace both, what a great way to start unemployment hahah 😆
Congrats on getting your Masters and getting to work with Yamaha.
Your coil is fine, it's a current coil. They are different than a voltage coil.
I checked a new blue box coil I have and it reads .7 ohms on the primary and 8.54 K ohms on the secondary.
 
Congrats on getting your Masters and getting to work with Yamaha.
Your coil is fine, it's a current coil. They are different than a voltage coil.
I checked a new blue box coil I have and it reads .7 ohms on the primary and 8.54 K ohms on the secondary.
That’s great news!
So potentially only the blue box unit is broken, which is just over 100 euros from Heiden - will need to check.
And thank you 👨‍🎓
Check your pick-up should be around 142 ohms.
I will as soon as I’m back from vacation,
So you are able to read ( hahah .. a only Joking ) congratulation

There are fault finding procedures

https://vintagebikemagazine.com/technical-articles/boyer-trouble-shooting/
Well only sorta, I’m dyslexic 🤓 heheh but thank you.
That fault finding guide is way better than the one Boyer has on their website, thank you!
 
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