Aerox 1/4 throttle too rich

Discussion in 'Scooter Tuning' started by Tom001, Jun 21, 2012.

  1. Tom001

    Tom001 New Member

    Messages:
    8
    Hello,

    I'm new to this forum because I can't find the right answer on my native scooter forum.

    I have an Aerox with a Minarelli Horizontal engine with following setup:
    - Polini Evo 3 70cc (squish 0.45~0.5 // NGK BR9ES)
    - Dellorto 21mm (W7 needle ~ Main jet 82 ~ original airfilter with snorkle removed)
    - Stage 6 V-force
    - Yasuni C20
    - Polini Rotor with light coils (4,5 mm ignition advance)
    - Malossi overrange (3,5gram, I don't know what system is used here, I use metric system weights)
    - Stage 6 torque control
    - Stage 6 13/43 gearing

    The problem with this setup is that it stutters at 1/4 throttle, it sounds as if it gets too much fuel?

    I have a movie, this is not great quality but you can clearly hear my problem:


    Thanks!
     
  2. Mr Bizzle

    Mr Bizzle Active Member

    Messages:
    947
    Rides:
    04 Aerox 70 stage 6
    This is the transition between the pilot jet and the main jet, you may be able to improve it by adjusting the height of the needle. try raising the clip 1 grove.
     
    Suzukistreetmagic1 likes this.
  3. Jonnymarrw00t

    Jonnymarrw00t Moderator Staff Member

    Messages:
    3,243
    Rides:
    Piaggio Zip 05 plate
    Please tell me not standard crank??lol What jet you using ??
     
  4. Tom001

    Tom001 New Member

    Messages:
    8
    @Mr Bizzle
    The clip is already at the top grove.. But thanks for the advice!

    @Jonnymarrw00t
    The original crank has been replaced by a Doppler Endurance Racing crankshaft, I'm not THAT crazy to run this setup on a stock crank :D
    The jet is mentioned in the starting post ~ 82 main jet
     
  5. Jonnymarrw00t

    Jonnymarrw00t Moderator Staff Member

    Messages:
    3,243
    Rides:
    Piaggio Zip 05 plate
    It could be your airbox tbh,
     
  6. wkdwrx

    wkdwrx Member

    Messages:
    76
    mine also does the same i have a 21mm del carb 92main jet the air/fuel mixture screw 1 and a half turns out and still splatters oh and 70kit malossi
     
    Suzukistreetmagic1 likes this.
  7. Tom001

    Tom001 New Member

    Messages:
    8
    Is this with stock air filter?
    In my case it could be the airbox, as Jonnymarrw00t stated.
    My 21mm was delivered with pilot jet 50, I will try a smaller pilot next week, since the pilot jet functions up to 1/4 throttle...
     
  8. wkdwrx

    wkdwrx Member

    Messages:
    76
    mines got a malossi pod on it
     
  9. Mr Bizzle

    Mr Bizzle Active Member

    Messages:
    947
    Rides:
    04 Aerox 70 stage 6
    This seems to be a common issue with 70 kits and bigger carbs, setting up the main jet is okay but setting up the pilot jet and in partiicular the transition stage is a right bitch.
     
    Suzukistreetmagic1 likes this.
  10. Alpal

    Alpal New Member

    Messages:
    18
    Get it dynoed
     
  11. Tom001

    Tom001 New Member

    Messages:
    8
    I went yesterday and this is the result, 13,4 HP SAE...
    Any suggestions?

    [​IMG]
     
  12. Suzukistreetmagic1

    Suzukistreetmagic1 Member

    Messages:
    100
    This what I’m
    Looking for exactly my issues
     
  13. Suzukistreetmagic1

    Suzukistreetmagic1 Member

    Messages:
    100
    I found by slowly pulling the throttle back gets throw it so I don’t think it’s worth a shot on lifting it up one or down jet the pilot jet Shane user bizzle not about no more Administrator if you see this what do you think ? Cheers
     

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