4-stroke

  1. P

    Carbed 4-stroke OHV engine science....

    So after a few months of riding my MB200 and delving deeper into working on 4 stroke engines, I've noticed a few things... Below are the questions and anyone who knows scientifically what is going on, please chime in::scooter: Note: I have a stock 212cc Pred in the MB200 and it has maybe...
  2. F

    Going out for a ride(Helmet-cam)

    Hi! This is me riding my restored 150cc pocketbike, my friend is riding a Cat 300X minibike. Enjoy the video! Going out for a ride - YouTube
  3. B

    Baja 2.8hp 97cc 4-stroke engine help

    Does anyone have any tips for my db30's power and acceleration?
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