Motor running faithfully now, but.......

Discussion in 'Motorized Bicycle General Discussion' started by Josh380, Mar 4, 2009.

  1. Josh380

    Josh380 New Member

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    You're both right. I moved the clip up one notch...man, what a difference! I put in the NGK plug, got an accel 8mm plug wire that has RF shielding (no more speedo resetting), and noticed an immediate difference in the way it ran. It ran a lot smoother, way less vibration, throttle was very responsive, a lot quieter, and I topped out at 28 mph on flat ground. Now if only I could figure out where the rear wheel is rubbing....may need to have it trued since it's new. Should I take off the rear spocket before I bring it in?

    What gap would you suggest MB?
     
    #21 Josh380, Mar 9, 2009
    Last edited: Mar 9, 2009
  2. gofast

    gofast New Member

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    You may want to reverse the way your metering rod assy goes...if the metering rod does not have ample play up and down,then you get a neg pressure factor allowing proper vacuum to negotiate your air fuel mixture.You will see this in the conditions that you have said.
     
  3. a_dam

    a_dam New Member

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    Good to hear that it sounds like you've got it figured out. Your description of running rough sounded familiar to me, even though our motors are probably very different.
    I've got a homemade friction drive rig with a Homelite 25cc two stroke. Normal operation for me is to put it on full choke when I am starting it completely cold (first ride of the day). I have a 3-position choke. Full choke is only for a second when I first engage it, and I might have to "play" with the choke between full and half for a few seconds until I get up to a cruising speed. I'll leave it on half choke until it heats up (maybe a minute, depending on weather) and I can hear/feel when it is ready to flip to no-choke. Then she runs great as long as she's hot.
    But I've found out that this little engine is sensitive to the temperature. If the temp is below 40, I have to adjust one of my carb mixture screws a little (there's two screws on mine). If its over 70, I'll adjust it back. No big deal, once I figured that out. If it's not adjusted, it acts just like there is not enough/too much choke and runs just like you described.
     
  4. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Huh?

    Whatchootalkingboutwillis?
     
  5. NEAT TIMES

    NEAT TIMES New Member

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    Joe, Don`t You Use Your Vacuum To Negotiate Your Air Fuel Mixture//!!! ?? How Do You Go Anywhere??lafflaff:-|| MAYBE HE WILL EXPLAIN FURTHER. I WOULD SAY HE MADE AN ACCURATE STATEMENT. WHAT THINK YOU ALL??
     
  6. Josh380

    Josh380 New Member

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    Wasn't going to say anything, but I second the HUH?
     

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