Cali,
My friend is having the same problem with his 85 right now. His was the cdi. He's some specs to check to help you narrow it down.
ignition coil---primary coil resistance 0.16-0.2 ohms
---secondary coil resistance 3.69-4.51 ohms
(without spark plug cap)
Exciter coil resistance--- 50-250 ohms
pulse generator coil resistance--- 50-200 ohms
lighting coil resistance--- 0.1-1.0 ohms
ac regulator---regulating voltage 13.5-14.5 V
---resistance 100k ohms
hope this helps.
Kimmer
THERE FROM THE START-HASPIN VET 2002-2003-2004-2005-2006-2007-(missed 08-dang babies)-2009-2010-2011-2012-2013 AND ALL THE REST!
1985 Big Red
198? Kawasaki KLT 250
19?? ATC70
"Secret Project" Tiny Titan
2010 Polaris Crew