bike help carb too big

Discussion in '2-Stroke Engines' started by benjy6, Jan 14, 2009.

  1. benjy6

    benjy6 Member

    ok i just got a new mountain bike
    and when i got it home fitted the motor to it
    first problem was the carb. was a tad bit to big, now i read somewhere on here of someone who had the same problem and they fixed it with a copper piece, i cant seem to find that thread, if someone would please direct me to that thread ,that be great.

    2nd problem so far is the spark plug tip has no space from the top tube
    is there a smaller plug available?

  2. srdavo

    srdavo Active Member

    I can help with the sparkplug.

    Champion CJ7Y
  3. benjy6

    benjy6 Member

    how can u help?
    but one thing, would leaning the engine forward a lil bit hurt it in anyway?
  4. benjy6

    benjy6 Member

    this is the carb problem
    filter hits top frame tube and doesnt allow to slide on header

    Attached Files:

  5. bluegoatwoods

    bluegoatwoods Well-Known Member

    Have you tried putting the carb on without the air filter? It should fit, unless your bike is very small. then put on the air filter.

    I doubt if you could lean the engine forward very much without raising that carb assembly right up into the top tube.
  6. azbill

    azbill Active Member

    the champion plug srdavo mentioned is a low profile (a lot shorter than stock)
    it will give you at least 1/2" over stock
  7. benjy6

    benjy6 Member

    thanks for the help guys i got everything to fit for now
    still gotta run cables and all

    i got the carb to fit by cutting the top of the filter off
    is there a low profile filter i can bye or would i be better off making one
  8. jacliny

    jacliny New Member

    you can use a 5/8 copper 45deg elbow, 5/8 copper is used by air cond installers so a good hvac supplier should have one. it sets the carb off to one side or the other, your choice.
  9. benjy6

    benjy6 Member

    ok i got the carb to fit with out the copper tubing.
    to put the throttle on the carb has to lean a slight bit to the right.
    will it still function with the tilt ?
  10. fetor56

    fetor56 Guest

    It will still function properly with a small tilt(not a ridiculous tilt)
    If u run into more problems why not just tilt the engine more.....their very forgiving about the angle their placed.