Dyna S problem

I recently bought a dyna s system from a guy, and put it on my twin kz750. the electricals all work, and it has great spark output, but if I get the rpms above 4 grand for more than a couple minutes, it messes with my timing advancer and it sticks. I have to get off and twist lobe piece on the crank to reset the advancer arms. there was a lot of play between the advancer and the new lobe piece, so i out a couple of o rings between them and it still happens. i also groud down the arms of the avancer a bit cause they wouldn't fit into the new lobe peice smootly. If anybody with any expieriance with the Dyna s ignitions, i would greatly appreciate some help.

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the dyna is made to pretty much bolt on, sounds like your advance unit may be wore out, o rings to me would make it tighter, and thats not really waht you want.
take the advance unit off the bike and check eveything for worn parts, you may need to track down anohter on to make it work right again

The stock lobe fit just fine, this one however had too much play so i added the o rings which gave it the perfect amount of room to turn.