BILL the WRENCH-SPINNER : Over the years I saw those MC1 go bad for no reason, talked to MSD rep at dealer show long ago and he told me to buy the NEW - UP-DATED ONE !!!!! I told him the one we had was BRAND NEW and his answer was send it back = I walk back to the parking garage to my truck and carried back in the bad part in the box, he gave me a NEW-UP-DATED one........... this was at the Big MOTORCYCLE DEALER SHOW in Cincinnati,OHIO about 15-18 years ago. We had a few go bad over those past years and we sent them all back to MSD for repair or replacement. Never had a DYNA part go bad !!!!! Green coils and a DYNA S ignition made the 1000 KZ'S Z1R run just fine [ 10.90 's ] stock motor, pipe, 29's, long arm , lowered, X2 cams,elec. shift, and 110 octane AVIATION-GAS = over 400 PASSES with no problems.
POPS BK911