Motoplat info needed

Hello to all.I picked up a 73 cr 250 that has the weakest spark I have ever seen.After testing it with my meter the stator & coil show some what close to the specs that are posted on several motoplat web sites. I have noticed that neither part shows it contains the required diode.I am thinking someone swapped the coil with the wrong one.Can someone chime in & tell me what circuit has the diode.Nowere on the net is it shown. If I knew where it goes I would try a few different ones I have. Thanks, tom

As part of the process of elimination. Make sure you have good ground eveywhere. Motor to frame, coil to frame and stator plate to motor. Poor grounds can cause a weak spark.
Try disconnecting the kill button to.

Look at the service bullitens and/or the Husqvarna Reports in the Vintage Tech Ref section. I think the infomation you are looking for is in there. The one about updating the black wire coil. I think it says something about the diode being moved to/or from the coil. Lot's of good infomation in there.

Tommie D is right, change the coil out with a 77 or newer coil, and make sure its grounded well, and youll see great spark.
the 73,s had an issue with the upper coil, they pig tail grounded it and it still had issues...
updating to the newere style coil, cures the issue.

ok guys thanks for chiming in.I went through all the service bullitens on this site & was unable to find what I need.I did check the stator ground to frame & coil. This weekend I will clean all posible grounding & try a jumper between the stator & coil.Also going to try a diode on the black lead at the coil.Worse case I'll have to spend the big bucks on ebay for a coil.I am allso thinking about a possable jap bike cdi transplant if I cant get the motoplat working right.Ill keep ya posted,thanks,Tom south florida

i may have a updated coil available if needed.

You could always go with a PVL ignition. All brand new stuff.

If interested in running the motoplat have Vance rework it - he does wonders. Ron also has a good suggestion also - PVL work well on the smaller bores.