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does any one no the difference between the sp igniter boxes I have two one is numbered 3672 and the other is 3673 any advise will be great many thanks Roy

I think mine is a 3673.. the bike is a 1994 SP (M4) have been told its the toad one, but dont know for sure or what the actual differences (rev limit? advance curve ?) are.

would be good to know, but plan on using an ignitech unit anyway.

Hi, where do you get the numbers from as I have a sp ignition but can’t find any numbers on the box? What do you mean by toad one????

Thanks pal, that’s sorted the issues out!