2015 Sherco ST 300

Discussion in 'Trials' started by Tomb Raider, Sep 17, 2016.

  1. Tomb Raider

    Tomb Raider Been here awhile

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    Got an HR in today with no get offs. Changed oil, back to the good stuff. Red oil was silver. IMG_20170616_181918462.jpg
    .
  2. Tomb Raider

    Tomb Raider Been here awhile

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    Fork oil, 5 or 10 wt ? Will 10 make it stiffer ?
  3. Xanderby

    Xanderby MotoTribologist

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    Yes 10 will make it stiffer than it would be with 5.
  4. Tomb Raider

    Tomb Raider Been here awhile

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    Went with Bell - Ray 7 WT. Bounced around some, seems better. Ride it today. RY says you want the suspension to bottom out for traction ?
  5. alpineboard

    alpineboard Been here awhile

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    RY says you want the suspension to bottom out for traction ?

    I think what RY means is that if you are not bottoming out in your certain bigger drop spots or where ever it is that you ride that will allow you to bottom out, That your springs might be too stiff for your weight, and thus not getting the traction that you would get , if your springs were softer.
    Realizing that a softer spring front or rear, will keep the rubber on the ground , and absorb any deflection that a stiffer spring may make the tire bounce upward/away from the ground, and thus lose traction. A softer spring will keep the tire glued to the terrain. Kind of like why we use 3.5 pounds of air in our tires, and not 30 pounds.
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  6. jonnyc21

    jonnyc21 Trials Ninja

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    In trials you are part of the suspension system... So a good way to say it is; you want to be able to bottom it out not that it should bottom out. If you can't get it to do so then its way to stiff.

    The benefit of that is both traction and control. The control part coming more with experience and flow of how to work with the bike not make the bike do all the work. Very hard to do that with the stiff suspension.
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  7. Tomb Raider

    Tomb Raider Been here awhile

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    New section, front yard. Pulled all the bushes out, forgot this was there.

    New Section.jpg
    New Section 2.jpg
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  8. motobene

    motobene Motoing for 46 years

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    There was a Sherco rider from Europe at the world round running an Ohlins shock body end-up, which can cause the spring to hit the frame stiffener member just in front of the shock. Intrigued, I looked more closely and found the rider had an 80 N/mm spring as well!

    His rear end didn't settle under the bike's own weight and rode butt high in sections. The rider managed OK, but the bike wasn't in my opinion working as well as it could have.

    The rider did what many assume: to slam obstacles hard you need stiff springs and/or a lot of preload. But that comes at a price to handling (busier front end) and reduced traction and ability to stick after the hard hits. The stiffer spring often requires running the bypass (rebound) farther in to control bounce back, and that reduces ground compliance for improved traction. Compliance isn't as important in big sticky rocks, but it hurts in the wet.

    The modified Ohlins I've been testing with 60 N/mm spring and only 1mm preload. It has a true 'bottomless' feel. Part of that is the added travel of course, but what Randy Lewis has been preaching to me about improving trials suspension is sinking in.

    Quite evident with Bou's bike, which is the trickest out there, is what appears to be a nice, soft rear end that squats nicely and doesn't bounce back on the hard hits. I looked closely at his shock. My guess is 60 to 65 N/mm spring. I could be wrong, but his bike does not ride butt high. His rear end often looks mashed out when he's doing his magic on the rear wheel.

    I've noticed on my modified Ohlins how balanced lateral control is enhanced with the softer spring. Placing the front tire just so on the peak of rocks in a series of little floaters is easier with the softer spring.

    But a caveat in what I'm emphasizing. While rider preferences aren't always truly more optimal, there is no one set of right settings for all riders. I do believe in generally righter, but gosh, there are huge differences in riders and styles. How forceful a rider can be varies tremendously. My old body would snap, for example, under some of the slamming forces of top riders.
  9. lineaway

    lineaway Long timer

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    Sounds like rider 37. He looked terrible Thursday in practice. Could be unhappy not having his usual machine. I think his bike was new and he brought his trick bits with him.
  10. motobene

    motobene Motoing for 46 years

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    37 was Cabestany, who is getting older and has definitely come off his game. No, it wasn't him. He's quite tech savvy. He was running a more normal Ohlins shock.

    I watched 'Cabes' and Bou interacting a lot studying sections, like long friends. Bou has continued in top form, but Cabes has fallen apart this year. He's 37, while Bou is 30.

    Makes me chuckle thinking of anyone as older because I was 23 when Cabes was born. But at that level 7 years matters. Fuji is also 37, however, and still rides as forcefully as ever.

    Our butt high mystery man could be 233 Blanch from Andorra or 246 Sandrock from Chile.
  11. lineaway

    lineaway Long timer

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    Garrett noticed all the bikes that run tech forks. The riders had the tech pro forks and not just the stock ones.
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  12. motobene

    motobene Motoing for 46 years

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    Emma Bristow said the factory Techs are 'smoother.'

    Riders are rarely engineers, so I did not score on more specifics other than Cabes saying the forks have another adjuster and they aren't THAT different than standard top-model Tech forks.
  13. motobene

    motobene Motoing for 46 years

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    I saw Garrett in lot of quiet contemplation up on that rock. Observant kid!
  14. lineaway

    lineaway Long timer

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    He would be glad to tell you everything he noticed on Bou's bike.
  15. Gordy

    Gordy Team Listo

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    I heard the TRSs were running steel forks to add weight in order to get to the minimum and some lead under the skid plate rubber bumper deal. :dunno
  16. jonnyc21

    jonnyc21 Trials Ninja

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    That wouldn't shock me at all...