84 kx 125 stator question

[kxrider125]

I went to have a look at my stator and noticed it was turned all the way to the left,someone even notched out the slots to get a little more turn out of it.
Does anyone know why someone would do that?
The bike crackles when it hits power band,it actually has no powerband at all.it has good low end power though.
I have a used stator that works from another 84 kx 125.Can i just swap them over?is that why the bike crackles in power band.
The bike starts very easy usually on the second kick.and it idles nicely as well.
any ideas
thanks
tony

 

[kxrider125]

nobody has an answer for me?
Got ya all stumped?
ok well,im just gonna try my new stator and see if the problem still exists.
take er easy
Tony

 

[kxrider125]

anyone got any thoughts as to why the stator was turned that way?

 

[dirt bike dave]

FWIW, stator failure was pretty common on the mid '80's KDX's, so it's not surprising to hear the '84 KX might have a problem, too.


Turning the stator to the left will retard the timing. Below is taken from one of Eric Gorr's web pages:

"Retarding the timing will make the power band smoother in the mid-range and give more top end over rev. When the spark fires closer to TDC, the pressure rise in the cylinder isn't as great. The emphasis is on gaining more degrees of retard at high rpm. This causes a shift of the heat from the cylinder to the pipe. This can prevent the piston from melting at high rpm, but the biggest benefit is how the heat affects the tuning in the pipe. When the temperature rises, the velocity of the waves in the pipe increases. At high rpm this can cause a closer synchronization between the returning compression wave and the piston speed. This effectively extends the rpm peak of the pipe.



HOW TO ADJUST THE TIMING

Rotating the stator plate relative to the crankcases changes the timing. Most manufacturers stamp the stator plate with three marks, near the plate's mounting holes. The center mark is the standard timing. If you loosen the plate mounting bolts and rotate the stator plate clockwise to the flywheel's rotation, that will advance the ignition timing. If you rotate the stator plate counterclockwise to the flywheel's rotation, that will retard the ignition timing. Never rotate the stator plate more than .028in/.7mm past the original standard timing mark. Kawasaki and Yamaha stator plates are marked. Honda stators have a sheet metal plate riveted to one of the mount holes. This plate insures that the stator can only be installed in one position. If you want to adjust the ignition timing on a Honda CR, you'll have to file the sheet metal plate, with a 1/4in rat-tail file."

 

[kxrider125]

thank you for the reply.
My stator is turned as far as it can turn in the moon shaped notch.the notch is even carved out some to allow more turn.
Its winter and -40 here in canada currently so i havent been able to install my new(different)stator and test it.
After reading what Mr.Gorr has to say about timing,i find it odd that the stator can be turned that far and still the bike starts and runs fine except for the power band is basicly non existant.
Any other thoughts on this.
Im quite curious now
Thanks
Tony