Home Forums 2-Cycle Racing Kt100 coil & tci question

This topic contains 2 replies, has 3 voices, and was last updated by  Walt Gifford 2 years ago.

  • Author
  • #70617

    Rick McClure

    Looking for a little feedback. Have a Yamaha KT 100 ran in Junior sportsman class. Has anyone ever heard of the coil or TCI causing motor to stick on fresh rebuilt or even after a couple hours on motor

  • #70620

    Jim White

    Never. If they fail you just get no spark. As long as you got fuel it should have nothing to do with a stick.

    Now if the ign rotor was installed without the key it could have slipped. I guess that could increase timing enough to get into detonation.

  • #71148

    Walt Gifford

    Stick on a fresh rebuild could be bad communication between engine builder and racer. Builder sets it up thinking it will get a long break in and the customer thinks it’s ready to race.

    If I don’t know what’s going to happen to the engine after it leaves the shop I put in extra clearance.

    Ignition could be set up with too much advance and too little rotor clearance. Might be a contributing factor.

    Did you put oil in the gas?


    FAA certified jet engine and aircraft technician,
    Nicholson Speedway class champion 2001,
    Yamaha KT100 Service Center,
    41 years karting experience

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