adjusting float level / air ful ratio

Discussion in 'General Questions' started by macarollo, Oct 9, 2008.

  1. macarollo

    macarollo Guest

    I have a 70cc HT kit.

    My bike was running badly... vibrated like crazy and it surged at full throttle.

    I took the carb apart, retightened everything AND adjusted float level (I bent it so the float would raise a lot more.

    Now the bike runs soooo smooth compared to what it was (I think it was running way lean). I also think the pin on the fork (pushes float down) was not in correctly.

    One problem I see... the bike only goes 25 mph top speed now... even downhill (GPS verified).

    Do you think I am running too rich now? Did I bend the fork float too much you think?

    Is there another way to adjust air/fuel ratio?

  2. Mountainman

    Mountainman Active Member

    too rich ??? just maybe

    since it appears that this - new problem came up after the other problem was fixed

    you don't mention what your top speed used to be ?

    maybe try taking float 1/3 to 1/2 back to where it was before adjusting

    if this increases your top speed -- you may be getting close to the place known as


    good luck with that -- and always remember to enjoy yourself when you

    Ride That Thing ------------ MM
  3. macarollo

    macarollo Guest

    When I first got it I wa able to get it to around 30mph on flat ground and 35mph down a hill (scary how much the engine was screaming).
  4. macarollo

    macarollo Guest

    I tried to adjust the fork back a little bit and that did not seem to increase top speed...

    My test was run short because the studs on my rear motor mount both snapped off... I heard a TING TING TING on the ground. I am used to hearing things fall off of the bike so I immediately turned around and noticed that it was my rear motor mount bracket and stud on the ground... the other one is nowhere in sight.
  5. Mountainman

    Mountainman Active Member

    well - if you are hitting 25 mph at this time -- you are not off by much

    how's that plug looking ??

    if it's truly too rich -- should show on the plug

    a nice burning plug usually = a great time when

    we ride that thing ------- MM

    ps -- I see many posting top speeds for level ground and then downhill ???
    it's kind of silly -- to me anyway
    to push an engine rpms while going downhill
    beyond what it can do on the level...
  6. Mountainman

    Mountainman Active Member

    I am not used to that macarollo

    but - I feel your pain

    buy some good replacement bolts soon

    and we wish you much luck as you

    ride that thing ------ MM