Changing your Rotor/Stator BEFORE it blows up is better than cleaning your engine out after!
I’m going to describe the failure in detail for any riders who have experienced the symptoms and are looking for the diagnosis, and for those who have not yet done the RMStator swap. This will happen if you have original Rotor/Magnets in your bike at some point and the failure symptoms can vary a ton, this is just mine.
Was starting from a stop in traffic yesterday, when coming up through 2nd gear around 3600rpm I felt a jolt through the bike and it started vibrating heavily while producing a whining sound.
Both the vibration and whine followed the engine RPM while riding in gear and revving freely. I was around the corner from the gas station so I stopped to fill up as intended. After pulling out of the gas station the vibration was lessened, but it “jolted” again and the vibration was worse now.
Took the bike straight home, only a couple kilometres away, and shut it down. No misfires, no smoke, no dash lights or errors, no leaks and seemingly no power loss, but I wasn’t hard on the throttle or in high rpm’s trying to get it home to test that fully.
As you can see in the photos, the infamous rotor magnet failure is the culprit, roughing up my stator and its wiring pretty good in the process and ejecting 60% of its now powdered magnet shards into my engines bottom end. Parts are on order and I’ll be tearing into the clutch side and oil pan to manually clean as much magnet material as possible out, before flushing the motor multiple times to clear out debris.
Like many before me learned the hard way, don’t wait to do the swap. It took me 30 mins to take the old parts out with hand tools, so it’s easy to do! Gonna take a lot more time to clean out all the crevices in that engine with hope it’s good to go for the future.
TLDR:
Do the rmstator swap now if you have no records of it being done. It will fail, and you’ll have hours of cleaning and assembly as a result, if you’re lucky. Or a ruined motor that’s now a paperweight if you’re not.