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Thread: atc 70 project help...motor swap?

  1. #16
    Join Date
    Aug 2010
    Location
    Clinton, TN
    --
    72
    bump...I need answers lol

  2. #17
    Join Date
    Jan 2010
    Location
    Beaver Falls, PA
    --
    2,666
    Quote Originally Posted by parker88 View Post
    what kind of chain and sprocket setup are you guys running with the 125 motors?
    I dont have any of the stock wires or anything from the 70 motor. My 70 is just a roller. Is there anything from the pitbike motors that is supposed to hook up to any of the old wiring or anything?
    http://www.3wheelerworld.com/showthr...ght=suspect+70

  3. #18
    Race Demon is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    May 2009
    Location
    coshocton
    --
    245
    The Piranha motor comes with all the wiring you need, the only stock thing you use is the on off switch, you will also need an air cleaner, the stock sprockets from a 70 will fit that motor, since you don't have a front sprocket I would start with a 14 tooth on the front and run the stock back one with 420 chain for stock tires, the gearing is a bit high for stock tires but you will have plenty of motor to start with, as you get adjusted to the motor you may want to change the gearing to suit your riding

  4. #19
    Join Date
    Jul 2008
    Location
    MD
    --
    911
    I run a 16 tooth on my 140 Piranha engine.

  5. #20
    Join Date
    Aug 2010
    Location
    Clinton, TN
    --
    72
    Quote Originally Posted by Race Demon View Post
    The Piranha motor comes with all the wiring you need, the only stock thing you use is the on off switch, you will also need an air cleaner, the stock sprockets from a 70 will fit that motor, since you don't have a front sprocket I would start with a 14 tooth on the front and run the stock back one with 420 chain for stock tires, the gearing is a bit high for stock tires but you will have plenty of motor to start with, as you get adjusted to the motor you may want to change the gearing to suit your riding
    Will any kill switch work?

  6. #21
    Join Date
    Jul 2008
    Location
    MD
    --
    911
    Yeah any switch should work. I have a a little dirt bike push button switch on mine to keep it simple. If you want a headlight plan on a switch with a headlight switch on it. Same thing if you want electric start.

  7. #22
    Join Date
    Aug 2010
    Location
    Clinton, TN
    --
    72
    Quick question guys...would a 2007 honda crf 80 motor fit in a atc 70?

  8. #23
    Join Date
    Dec 2009
    Location
    Almond
    --
    16
    No thats an upright motor 70's are lay down check this site out has everything you'd ever need to know about building a 70 http://www.glamisdunes.com/invision/...p?showforum=50

  9. #24
    Join Date
    Aug 2010
    Location
    Clinton, TN
    --
    72
    biggyb12, Thanx for the link

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