4 stroking

  1. A

    Is 4 stroking normal when warming up?

    I've noticed that when the engine is pretty cold it will 4 stroke a bit when cold but after it has warmed up there is no signs of 4 stroking at any throttle position. Is this normal? Does this happen because of some thermal expansion of the metal or something?
  2. M

    I finally stopped my engine 4 stroking!

    Hey everyone, so my bike was four stroking for about 3 years, i finally decided to change that so i went out and got a nt speed carb, (i had an rt dax carb) and put the setting to the leanest on the needle and it finally stopped. it goes so much faster now!