Mitsubishi 49cc

Discussion in '2-Stroke Engines' started by pdxrhett, Jun 10, 2009.

  1. pdxrhett

    pdxrhett Member

    I am looking for a cheap tune up - it takes 20-30 pulls to get it started, and a lot of people on these forums tell me it should have enough power to take me upwards of 40mph (on a shift setup). My only question is: Why will it only take me to ~35? And thats only if I contort my body and have me head below the handlebars... Ill post pics soon.

  2. 5-7HEAVEN

    5-7HEAVEN Guest

    Cheap tuneup? Install new sparkplug and gap to recommended specs.

    If carb is adjustable, reset high and low speed jet, set idle.

    Clean air filter screen, adjust cable for full throttle.

    Adjust brakes for minimal drag, set tire pressure to specs.

    Lubricate all moving parts.

    Cheap tuneup.:detective:

    Don't believe 40mph conjecture. Speed depends on weight, gearing, wind resistance, etc.

    One vendor predicted 40mph on Mitsubishi 43cc engine, light body weight and 1.5" friction roller.

    My best speed was 32mph on a cruiser, but then I weigh 195lbs.:whistling:
  3. loquin

    loquin Active Member

    Also, check the anti-spark screen in the muffler. Mine got partially blocked, and the motor was somewhat hard-starting, and would bog down and start 4-stroking at high rpms. Removed the screen, and all was well.

    Is it a genuine mitsubishi, at 49cc?
  4. pdxrhett

    pdxrhett Member

    it has on the motor something that looks like this:

    and then 49 next to it

    note:It does not look exactly like that, that is just an estimate. I am talking about a complete engine overhaul btw
  5. loquin

    loquin Active Member

    what does the spark plug look like?
  6. pdxrhett

    pdxrhett Member

    well, i cleaned it a month ago, but i lost the tool. so it shouldn't be too bad..

    edit: I have gears, so it should be able to get me to 35 easily
  7. loquin

    loquin Active Member

    Here's a photo of a mitsubishi TLE43 (Staton chain drive) Is that the same logo?

    The reason that I'm asking is that I've never heard of a 49cc Mitsubishi engine.

    In this thread (post #9,) 123Bob posted a link to a Mitsubishi product line data sheet that has all their small engines.

    Attached Files:

    Last edited: Jun 12, 2009
  8. s_beaudry

    s_beaudry Member

    I bought a "knockoff" engine from Ebay about a year ago...

    Even with electric start, that thing was a bear to get going!

    Carb had a small air leak in it, then all wen well after that!
  9. Happy Valley

    Happy Valley Active Member

    They also come in all black. :D
  10. pdxrhett

    pdxrhett Member

    that is exactly what mine looks like - except i have a 5:1 right side drive gearbox (on thescooterguy's setup)