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n2otoofast4u

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  17. triple cylinder stock case ignition / crank questions,..

    in Drag Forum

    Posted

    2 hours ago, camatv said:

    i'm considering building a 3 cyl motor.  i have an old jig that was used long time ago along with a lot of cometic base gaskets.  so why not?

     

    Im not sure on how to clock the crank shaft? all 180*  2 fire then one? or should i attempt triple offseting them?   120

     

    what ignition setup has worked and how was it trigger'd? 780 mach Z modded to fit bangshee shit

      3 MSD ignitions with a trigger wheel on a flywhee stub? Although you can use MSD shit. Unless this is drag only with battery, the Mach Z shit is proven and simple

    could i use some existing yamaha 3 cylinder motor's oem crank stator coils CDI?  i think this would work good if i could get it all lined out.  i can cut a taper to match if that would be necessary.  i am just not sure what yamaha 3 cylinder motors were out there  jet ski? snomo? 

     

    the first one i am thinking of doing a 4 mill maybe even stock stroke long rod and just a 65mm bore stock cylinder setup.  unless i can find a triple cub or even T-rex 68 bore.. I have a VERY good start at a 7 triple cub. (I think, unless Cameron sold it which is very possible)

     

    any help or suggestions would be great.  

     

    Answers above to the best of my memory

     

    If I was to do it again, Id have the crank build with a ROTAX mag end so that you could just bolt on the ignition parts rather than cannibalizing an OEM setup and a Rotax setup. JMO. 

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