Motoplat ignition

[Taliesin]

Any body know how to test a Motoplat ignition like the one on a 1981 KTM 250? I need to know figures on the resistance etc to see if I'm getting advance.
My bike starts easily but hits a brickwall & won't open out it'l rev to about quater throttle only

 

[VintageDirt]

Penton Imports can probably tell you what you need to know. Their URL is www.pentonimport.com or here is a tech info page with a phone number, http://www.pentonimports.com/testing.html