FYI.... If this doesn't make you want to check your Magneto Rotor (Flywheel) Magnets, nothing will..... I have one loose magnet but likely to have more if i push em hard enough.
MY MAGNETO : View attachment 113194
NEW MAGNETO : View attachment 113202
My Magneto : 2003 SV1000s @ 26,000km. The bike is absolutely immaculate with impeccable service records. Riden mostly at motorway speeds & never sits in traffic (i split cages like my life depends on it). Mainly Ridden in temps 12°C - 24°C.
It's clear to see, the Epoxy has simply deteriorated & LET GO due to AGE & Not heat, oil type or riding style.
Check em now before it takes out your stator or even worse... your engine !
Why would you say heat does not cause deterioration of the bond/epoxy and it is only age? I have a nearly new rotor (less than a 1000 miles) in the garage that is about 5 years old and the epoxy has not changed color a bit from new. Even basic cruising at low engine water temps has shown significantly elevated temperatures in the stator and rotor. I have also run a few test to show that elevated temps on my hot plate (220-230F) for extended periods of time changes the color of the epoxy and can cause the bonds to fail.
The data from my bike is showing (I know it is one data point) that controlling the temperature at the stator has now doubled my rotor life and still going. My first two sets of magnet failures happened both at about 32k mile intervals nearly identically. The bike gets commuted on year round so conditions stay nearly the same. After running the Compufire unit, I am about 60-70k miles on this one and the temp at the stator and rotor are significantly less. It might not be 100% cause and effect, but a heavy correlation exists.