100 to 150 MPG ???

Discussion in '2-Stroke Engines' started by CPC, Apr 16, 2009.

  1. CPC

    CPC Member

    Ok allegedly Im supposed to get 100 to 150 MPG, HA! I just reset my speedo on the last gallon, and I ended up getting 64.5 MPG!!!
    Am I doing something wrong? I relize I wasted about 1/2 oz of gas when I cut the gas line to install a inline filter, but that much LESS?!

    Also I have my needle set at the second from the top position (4 notches for mine)

    Is this normal? From what Ive read, i dont think it is

  2. bluegoatwoods

    bluegoatwoods Well-Known Member

    No, I don't think that's right. You ought to do better than that.

    When I measured my mileage (49cc, two stroke, chain drive) I got 144 mpg. (give or take little)

    But I'm at a loss to explain this difference. Maybe not quite. You're not losing fuel slowly around the carburetor or anything like that, are you? And the engine is running normally? No fuel dripping out of the exhaust. I imagine you've already checked obvious stuff like that, though.

    Someone will come along with some better suggestions. Good luck.
  3. CPC

    CPC Member

    ok I just moved the e-clip on the needle valve to the highest setting (1 more up) and I get 1000 times better performance, SPEED at last...WOW! 29.2 Mph! now I need a new sprocket and a tire, since my rear break ate the sidewall :(
  4. bluegoatwoods

    bluegoatwoods Well-Known Member

    I wouldn't have thought that one needle setting would make a huge fuel economy difference.

    but if you're getting noticeably better performance, then it does suggest that you're onto something.
  5. CPC

    CPC Member

    we shall see, I should know my MPG by wedsday or so next week if not sooner. Ya a 7 Mph increase for 1 needle setting, all I got to say is wow, somethings different!
  6. Mountainman

    Mountainman Active Member

    a good sign !!!

    that is really a good sign --- 7 added mph !!!

    thinking that your miliage will also improve greatly....

    have fun -- be safe -- don't ride that MB thing sideways
  7. keylan

    keylan Member

    not to sound completely inept, what needle are you guys talking about?
  8. CPC

    CPC Member

    the carb's needle valve....thing you put together when assembling your kit
  9. keylan

    keylan Member

    and by adjusting it you mean twisting the screw attached to the throttle line?
  10. CPC

    CPC Member

    NO! you take it apart, there is an e-clip you can adjust up or down....which goes in this cylender thingie, to which a spring sits atop and your caable is connected to
  11. Mountainman

    Mountainman Active Member

    located inside of carb
    different clip settings -- so as to run richer or leaner

    note -- not all carbs have these clip settings -- different positions ((inside))

    Happy Time engines -- they got them

    ride that THING