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Thread: 520 front sprocket question

  1. #1
    apriliaforum prov-nov
    Join Date
    Sep 2016
    Long Beach

    520 front sprocket question

    I installed a new 520 setup todya and everything went pretty smooth except for one thing. The front sprocket had a shoulder on either side of the teeth( one shoulder thicker than the other). I laid the new and old front sprocket side by side and it appeared to me that the new sprocket needs the thicker shoulder installed towards the motor for the teeth to line up on the new and old sprockets. Was I right in installing it that way or should the thinner shoulder be in towards the motor? Thanks in advance for any help!

  2. #2
    apriliaforum newb
    Join Date
    May 2018
    Did it yesterday on my Tuono, the thicker side towards the motor.

  3. #3
    apriliaforum Member Flamethrower's Avatar
    Join Date
    Apr 2016
    Washington, USA
    Inward - yes. Thicker side facing inward.

    Confirmed by notes and photo on AF1 site here:

    Sent from my Pixel 2 XL using Tapatalk

  4. #4
    apriliaforum prov-nov
    Join Date
    Sep 2016
    Long Beach
    thanks everyone for the replies! glad I don't have to pull it apart and flip it around

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