Tire wear, suspension setup?

Discussion in 'General 1000RR Discussion' started by thewiz, Jul 5, 2017.

  1. thewiz

    thewiz Active Member

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    Done 5 trackdays on my Bridgestone S21 and so far i think they have performed excellent.
    I am running 30 / 30, the latest trackday i was running 29 rear and 30 front (cold).

    Are there any tire expert on here that can take a look at the tire wear on my bike? I have never setup or done anything to the suspension before, but i feel like the front of my bike is a bit stiff. Also, its a tad hard on turn in i think. I have to wrestle the bike a bit when changing directions fast.

    As the tire wear is concerned, it looks like the suspension is dialed in okey?

    Maybe you see something that i don't from the tire wear. Looks allright to me.

    s21s.jpg

    s21a.jpg

    s21b.jpg

    s21h.jpg
     
  2. Jimbo Vills

    Jimbo Vills God Like

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    5 days out of that! Wow... don't change a thing. That's perfect mate.

    As for the front, see the suspension guy on the day, be best £50 you spend and he should get the front more dialed in.

    Few turns pre old may be all it needs.
     
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  3. Gaffa22

    Gaffa22 Well-Known Member

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    I agree with Jimbo they look really good,
    I have the same tyres and have a full track day booked next month, so will try those pressures.

    It's definitely worth having the bike set up correctly for both track and road use.
    Keep a note of the settings, so you can quickly change from road to track
     
  4. tuktuk

    tuktuk Elite Member

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    I have just done my first trackday following suspension setup.

    [​IMG]

    Bike felt alot more stable in a corner and held a line really well. Metz k3 32f 28r hot.
     
  5. thewiz

    thewiz Active Member

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    Just to clarify, they have been through about 1000km road use and 5 track events, at my local track we get to do 5 sessions of 15 minutes per track day. Don't know if it is the same in the UK. Wanted to clarify that so people can use this as a reference.

    The bike feels great on track, but at my last trackday with these i started to loose a bit of confidence in them, as i was running out of front tire grip. Felt a bit sketchy. Don't know if it was that i was just tired or if it were the tires / suspension. I have notice that my forks never bottom out, i think the max is leaving 3-5cm of fork travel left.

    I have read that some people drop the forks a few mm, will that help with turn in? But don't want to overload the front either.
     
  6. Gaffa22

    Gaffa22 Well-Known Member

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    Forks bottoming out will depend to a certain extent on the layout of the track,
    Do you have any long straights were you then end up really hard on the brakes ?
    Ideally you want to keep the forks in the middle third of their travel, except under heavy braking, so if your track does not have any heavy braking corners you shouldn't get near to bottoming out.
    5cm off bottom would tend to mean the front is a bit stiff.
    Have you set the rider sag correctly on the bike ?
     
  7. thewiz

    thewiz Active Member

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    Yes, there are 2 long straights where i reach 150mph before braking hard before turning. I have not set up rider sag or touch the suspension in any way. I don't know if previous owner set it up either.

    I see some forks have a ring that can indicate how much the forks compress , is this something you can add? Would be nice to see how low the suspension goes after a trackday.

    Here is a picture of my track.

    Rudskogen-hovedbaneNY.jpg
     
  8. Gaffa22

    Gaffa22 Well-Known Member

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    Nice looking track,

    You can put a cable tie round the fork leg as an indicator.

    I would certainly suggest you have the suspension set up or learn how to do it yourself
    first thing to do is rider sag setting as this will tell you if the springs are correct for your weight
    Google "Dave Moss setting sag" and also watch any other Dave Moss videos you can find.
    but like I said before write down your current settings so can always put them back,
     
  9. Dave dunlop

    Dave dunlop Elite Member

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    Awesome track fella:D your tyres look pretty healthy but that's not to say you can't get a better feeling! As the others suggested static and rider sags are so important....
     
  10. Scott

    Scott Active Member

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    I heard someone say sag was an old thing
     
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