FireFox 70cc - New exhaust??

Discussion in 'Newbie Scooter Tuning' started by JakeHuck, Nov 20, 2018.

  1. JakeHuck

    JakeHuck New Member

    Messages:
    7
    Hey, I resently put a new 70cc kit in the my 50cc moped and there is no change and im wondering why. i have taken off the variator ring and thats about it derestricting wise . But after i put the new kit in there was no change but after some research i think it might be the exhaust but im not too sure on it ive looked into other exhausts but the ajs firefox one has this thing on far right side so i dont know if i can have a different exhaust and put a new one in.
    https://gyazo.com/c4edc7688f4f0ecfbb18dc78c87befaf

    Does this one go in?
    https://www.ebay.co.uk/itm/Yamaha-Aerox-R-50-Tecnigas-Next-R-Performance-Exhaust-/302896784945


    But i was wondering how would i get a different exhaust for my moped so maybe it will be able to go faster.

    Cheers.
     
  2. scubabiker

    scubabiker NITROJUNKIE

    Messages:
    6,394
    That thing is an emissions thing, it puts air into the exhaust to reduce the emissions.
    Is it a minerelli engine?
    They go pretty fast without the variator ring
     
  3. JakeHuck

    JakeHuck New Member

    Messages:
    7
    Right now it goes 63 mph but it went that before with the 50cc so the 70cc change has done nothing
     
  4. JakeHuck

    JakeHuck New Member

    Messages:
    7
    So can i change the exhaust? Also do i need an emission in my moped or can i get one without?
     
  5. scubabiker

    scubabiker NITROJUNKIE

    Messages:
    6,394
    Increasing cylinder size doesn't really mean more speed. As the rotating parts are still the same.
    But changing the exhaust will make a big difference with a 70kit.
     
  6. kp46

    kp46 Member

    Messages:
    48
    Rides:
    YAMAHA AEROX
    you might need a bigger carb to make a diffrence. you cant just bolt on a 70 cc kit and want it to go faster. you need the supporting mods.
     
    scubabiker likes this.
  7. JakeHuck

    JakeHuck New Member

    Messages:
    7
    The kit comes with a carb
     
  8. JakeHuck

    JakeHuck New Member

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    Can anyone help me find one ?
     
  9. scubabiker

    scubabiker NITROJUNKIE

    Messages:
    6,394
    What engine does it have? 2 or 4 stroke?
     
  10. scubabiker

    scubabiker NITROJUNKIE

    Messages:
    6,394
    Ok I googled a bit.
    Change your exhaust. The stock one is holding your engine back.
     
  11. JakeHuck

    JakeHuck New Member

    Messages:
    7
  12. JakeHuck

    JakeHuck New Member

    Messages:
    7
    Also would i need to find an exhaust that has an emission like you were talking about?
     
  13. scubabiker

    scubabiker NITROJUNKIE

    Messages:
    6,394
    Can you upload a few pics of your engine.
     

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