Stella tuning

Discussion in 'Battle Scooters' started by Photog, Oct 2, 2005.

  1. Photog

    Photog Charismatic Megafauna Administrator

    Joined:
    Oct 13, 2003
    Oddometer:
    46,308
    Location:
    Cackalacky
    Scooter is used for daily in-town commuter, and Sunday road trip bike. Has to have wide range of tolerance for bumper-to-bumper, and 1-hour stints on the open road. Emphasis on low end grunt and midrange; no need for extreme top end. Typical cruise at 45-50, in town and on back roads.

    Here's what I've got if you're looking for a ballpark

    2003 Stella
    Pinasco 177
    24/24G: 120 air corrector, BE4 mixer, 112 main, 50/100 idle
    SIP/JL pipe
    500ASL
    ~19 deg.
    3 1/4 turns out
    Amsoil Dominator - autolube - will be switching to Castrol TTS
    NGK B8ES
    Top speed: 65+ (ind)


    Pulls from a dead stop in 2nd with negligable clutch slipping, from a rolling stop in 3rd, from 10-15 in fourth smoothly, quickly, and w/o hesitation.

    I'll will try to upjet a bit, and drop to the B7ES this weekend. Will post more if that tweak does anything good.

    Next mods:
    GS seat buildup
    Halogen & LED conversion
    Striping

    Thinking about:
    COSA
    Fireball upgear kit
    #1
  2. Photog

    Photog Charismatic Megafauna Administrator

    Joined:
    Oct 13, 2003
    Oddometer:
    46,308
    Location:
    Cackalacky
    From Zac at SS--Stella rider:
    #2
  3. JohnTM

    JohnTM I suck toes

    Joined:
    Oct 20, 2001
    Oddometer:
    29,206
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    Cornersville, TN
    Damn, Phog! You been on the job for what, two days? And you already got your own forum, a massive thread started, and the big red button™. You go, Girl!

    Hee, hee, I already hijacked a thread... :evil
    #3
  4. BUBB

    BUBB lynch not Zimmerman

    Joined:
    Apr 29, 2003
    Oddometer:
    20,676
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    I'm here because I'm not all there.
    let's start slowly....
    first of all is that a two or four stroke?
    #4
  5. BUBB

    BUBB lynch not Zimmerman

    Joined:
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    I'm here because I'm not all there.
    Hey, I was serious.
    #5
  6. Photog

    Photog Charismatic Megafauna Administrator

    Joined:
    Oct 13, 2003
    Oddometer:
    46,308
    Location:
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    2 Stroke.

    Occasionally a 3 or 4 stroke. :lol3

    The bike is a licensed-built Vespa PX-150 which was built in the late 70's and 80's using state-of-the-art 50's technology. :umph It's a 2 stroke motor and manual 4-speed transmission. Stock, they are quite reliable and peppy.

    This is generally what the classic Vespa 2 stroke drivetrain looks like from the left side:

    [​IMG]

    You're looking at the swingarm and rear drum brake and cylinder.

    Here's the right side view of a vintage vespa engine:

    [​IMG]

    That's the kick starter hanging out there.

    The engine is air cooled. The flywheel is also the fan, which forces air through a plastic cowl. The entire shebang sits underneath a fender cowl.

    The clutch is cable actuated, as is the transmission. The original design came from the flap-actuator system off WWII aircraft. You shift by rotating the left hand grip as you squeeze the clutch.

    The Stella uses a reed valve electric start 150cc engine that makes about 8 hp on a sunny day, 10 when it's really happy, 12 or so with a decent kit. If you want to sacrifice reliability, you can get 25+hp out of them...which will keep the front end in the air through the first 3 gears if not all 4.

    While some people keep them stock and are happy, the rest of us tune 'em, which requires some skills with understanding how 2T motors work, as well as being pretty sharp with carb jetting. That's part of the allure.

    Anyway--the older bikes like the Vespa (and Stella) and Lambretta with their manual transmissions are referred to as "classic" scoots, "shifties", "metal scoots" and all sorts of names (including "YOU POS") to differentiate them from the automatic scoots.

    They are the Royal Enfields of the modern scooter lineup--a brand new old scooter that requires a lot of owner attention to get the best out of them, and therefore a bit of craziness at times. :lol3
    #6
  7. Jack Daniel

    Jack Daniel See Ya At The Swamp

    Joined:
    Sep 15, 2005
    Oddometer:
    12,108
    Location:
    Weeki Wachee, FL
    Yea, I remember see'n, I mean smok'n out'a one of these at a party back in the 70s. Two strokes get you high man! I mean ma'm!
    #7