do i upjet if u de restrict standard exhaust

Discussion in 'Newbie Scooter Tuning' started by southweezy19, Sep 25, 2013.

  1. southweezy19

    southweezy19 hardcore ss member

    Messages:
    405
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    yamaha neos!!
    As above do I need to upjet if I dremel the cone restricter out The zorst
     
    southweezy19, Sep 25, 2013
    #1
  2. Merlin

    Merlin Old School Biker

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    2,305
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    2007 TKR WRC 50
    Yes, I would jet up one size - add 4 to the current jet size you have and that's the size you need.
     
    Merlin, Sep 26, 2013
    #2
    southweezy19 likes this.
  3. southweezy19

    southweezy19 hardcore ss member

    Messages:
    405
    Rides:
    yamaha neos!!
    Cheers bud just need to find out standard size jet now lol
     
    southweezy19, Sep 26, 2013
    #3
  4. Mr Bizzle

    Mr Bizzle Active Member

    Messages:
    947
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    04 Aerox 70 stage 6
    The usual rule of thumb for upjetting for a sports exhaust is 10% so for example a standard Aerox 62 main jet is changed for a 68.
     
    Mr Bizzle, Oct 3, 2013
    #4

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