View Full Version : MSD MC-1 or MC-2

02-02-2012, 07:34 AM
Hi, hereís hoping someone can help me out.
I have recently acquired a new never used MSD ignition unit, on the box it says Pt # 4210, on the unit it says MC-1 4220 (Ser # 9424), from what I have read 4210 is a MC1 and a 4220 is a MC2, do I have a MC-1 or a MC-2 unit. I think I have a MC-2, what is the difference between them:confused1:.
Next question, I have wired it up to the MC-2 wiring diagram (fig 4) and everything works fine but as soon as I use anything electrical on the bike the ignition cutís out, itís as if the MSD unit is using all of the power from the electrical system with nothing left to run anything else.:confused1:
I have fitted it to a Suzuki GS1100G (1982) with transistorized ignition fitted as standard, it has a new 14amp/hr battery and the charging system is working fine pushing out a healthy 14volts.
Thanks for any help Colin.

02-06-2012, 10:22 AM
the guys from powersports will be right with ya.

02-10-2012, 05:26 AM
Oh good but will be any time soon.:bored:

02-10-2012, 09:11 AM
The difference between the two units is the MC-2 has a shift kill on all the versions where the MC-1 only had it on the later version just before we switched over to the MC-2 and the MC-2 was a potted unit and could not be repairs. As far as the engine cutting off it could be the way the bike is wired is there any way I can have your phone number so I can give you a call or if you like please give me a call to go over it.


Thank you
Ray C.

02-13-2012, 10:45 AM
Thanks for the reply but Iím in the UK so I donít think a telephone conversation would be very cost affective although probably the best way of communicating.
Is there any info that I could give you that may help you in trying to sort out this little problem?
If you do feel you could contact by phone then please let me know and Iíll give you my number.
Thanks Colin.