Picklito
Husqvarna
Pro Class
Had a few minutes to snap some photos for ya. First is the 250WR in roughly firing position. I didn't put a dial indicator on it, I just rolled it over till it felt like TDC. It's close enough to give you the idea. There is no timing pin hole in the flywheel because it's timed via the "hole with pointer" method. Hole with pointer at roughly 5 o'clock, open hole at roughly 11 o'clock, when near firing position.
Second is what you see through the hole with pointer... the degree field. Again, don't go by the exact alignment, but when correct the pointer is on this field.
Third, is the exact same model of stator on the bench so you can see what it looks like. Notice this one says "83 250WR open R-Bl". It was the original, and developed open circuit Red-Black and stopped sparking. This is probably the most common SEM failure: Open circuit on Red-Black.
Fourth, is just a comparison so we can all keep our eyes open as we shop for used stuff.
Left is the 83 250WR, clockwise rotation, has degree field, is timed with hole/pointer.
Right is 1994 KTM 300 EXC, counter-clockwise rotation, no degree field, is timed with pin through flywheel.
There are all combinations of these features. Notice that you can't tell which rotation it was designed for by looking at it. I'm still working on finding out if there is actually any difference in the stator itself for the different directions of rotation. Nobody seems to know... but I have tested some that test in a way that indicates that they have a diode inside, and probably will charge in one direction but not the other. But that's for another post...
Both of these stators are dead, by the way.
Both are open circuit on Red-Black.
Both left me stranded in the MOFN.
Both times I was able to find suitable replacements through the good people of good forums like CAFEHUSKY****************************************!
Hope this helps.
Second is what you see through the hole with pointer... the degree field. Again, don't go by the exact alignment, but when correct the pointer is on this field.
Third, is the exact same model of stator on the bench so you can see what it looks like. Notice this one says "83 250WR open R-Bl". It was the original, and developed open circuit Red-Black and stopped sparking. This is probably the most common SEM failure: Open circuit on Red-Black.
Fourth, is just a comparison so we can all keep our eyes open as we shop for used stuff.
Left is the 83 250WR, clockwise rotation, has degree field, is timed with hole/pointer.
Right is 1994 KTM 300 EXC, counter-clockwise rotation, no degree field, is timed with pin through flywheel.
There are all combinations of these features. Notice that you can't tell which rotation it was designed for by looking at it. I'm still working on finding out if there is actually any difference in the stator itself for the different directions of rotation. Nobody seems to know... but I have tested some that test in a way that indicates that they have a diode inside, and probably will charge in one direction but not the other. But that's for another post...
Both of these stators are dead, by the way.
Both are open circuit on Red-Black.
Both left me stranded in the MOFN.
Both times I was able to find suitable replacements through the good people of good forums like CAFEHUSKY****************************************!
Hope this helps.
