Yamaha Aerox 50cc acceleration problems

Discussion in 'Scooter Tuning' started by Chappy1990, Jul 1, 2016.

  1. Chappy1990

    Chappy1990 New Member

    I have a 2010 Yamaha Aerox I replaced the standard bore for a malossi 50cc street race kit it's got 2 extra ports in the bore. It was running fine before I changed the bore.
    For some reason after replacing the bore and running it in I finally decided to give it a proper try.
    For some reason I have no power at all I got 3.7 gram rollers and yellow clutch springs.
    The only time the power would kick in was when I hit 40mph n it went crazy to 70-75 mph
    Driving me crazy can't pull away on hills
    Also put a stronger contra Spring. So I changed the clutch springs to malossi red.
    Worse pull off but now the power band kicks in at 30mph I have upjetted played with the needle
    It runs best with the needed clip at the top
    Anywhere else it spits and splutters
    Also would like to ad 1st start in the morning it pulls off like a rocket I mean mental for a 50cc
    Then after that it's terrible n I mean bad.
    Does anyone have any ideas at all will help loads thank you for taking you time to read my advert
    I will add a photo of the cylinder kit
    Note this is still a 50cc not a 70cc

    Attached Files:

  2. Suzukistreetmagic1

    Suzukistreetmagic1 Member

    Sorry for no reply feel for you
  3. Scooter freak

    Scooter freak New Member

    I have the same problem if its fixed can you please help me too?
    Suzukistreetmagic1 likes this.
  4. Suzukistreetmagic1

    Suzukistreetmagic1 Member

    What are your probomems

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