1st build and rough running

Discussion in 'Motorized Bicycle General Discussion' started by Rusty1, Jun 20, 2012.

  1. Rusty1

    Rusty1 New Member

    Joined:
    Jun 12, 2012
    Messages:
    50
    Likes Received:
    0
    I'm almost done with my 1st build after a lot of trial and error and a couple snapped chains I think Im finally there . My motor runs Quite rough though . Its sputters at just about any speed and at high speeds it bogs down . can anyone shed some light on this for me





    http://www.facebook.com/photo.php?fbid=374521095946817&set=a.374520882613505.88408.100001667880870&type=3&theater[/IMG]
     
  2. maurtis

    maurtis New Member

    Joined:
    Dec 14, 2011
    Messages:
    707
    Likes Received:
    0
    I thought your rear hub blew? I guess you were able to find a replacement?

    Need some more info, what kind of motor, what modifications (if any) have you made, how many miles, what is your fuel/oil ratio (assuming it is a 2 stroke), etc.

    My WAG would be you are running rich, both on the needle and main jet, but that info is pulled completely out of me arse... lol
     
  3. Rusty1

    Rusty1 New Member

    Joined:
    Jun 12, 2012
    Messages:
    50
    Likes Received:
    0
    Yupper ! My hub did blow and I haven't found a replacement as of yet . At least not one that Isn't going to cost me more than I paid for the bike . I Bought a 26 inch rear wheel and raped the front wheel off my old mongoose . Its still actually looks pretty good .
    I am running a 2 stroke and my fuel mixture is to manufacturers spec's I don't remember but I think It was 8oz's oil to a gallon of gas . I'd have to look it up . I'm an old fart with a short memory . lol . As far as modification's the only thing I've done motor and drive train wise is get rid of the chain tensioner . It Didn't matter what I did to it it kept throwing the chain at high and low speed causing me to brake 2 of them . The motor I'm running is a 66/80 starfire with somewhere around 3 hours on it .
     
  4. Greg58

    Greg58 Well-Known Member

    Joined:
    May 1, 2011
    Messages:
    2,927
    Likes Received:
    89
    16/1 mix is too rich, I tried the same with my first bike. I start all new bikes at 24/1 now with good success, look at your spark plug porcelain area it should be light to medium brown. Since elevation makes a big difference you may have to work on jetting also.
     
  5. Toadmund

    Toadmund New Member

    Joined:
    Jan 19, 2012
    Messages:
    792
    Likes Received:
    0
    I agree with Maurtis, try lowering your needle 1 notch.
    If rich at full throttle then means you need a smaller jet.
    But wait till break in is over when you switch to a regular oil ratio, things may get better, when more gas gets into the cylinder compared to oil.
     
  6. Rusty1

    Rusty1 New Member

    Joined:
    Jun 12, 2012
    Messages:
    50
    Likes Received:
    0
    Thanks guy's . I'm going to change my mixture before I head off to work and see if that does the trick . I would hate to find out there's a major problem . I have the only motorized bike in town and I love riding it .
     

Share This Page