Ridemalibu Motorcycle Rentals & Tours – Los Angeles CA
  1. Holiday Greetings. For those asking about Black Friday/Cyber Monday specials... Since we're such a tiny operation, it's tough to offer much... But we're again offering free shipping on $99+ orders to our U.S. customers on any in stock GTM product! Now through Monday at midnight, PST. Use POST-COVID-FREE discount code at checkout on our online Store link above - We truly appreciate your support. PLEASE Support small businesses!

V85 front end “hop”

Discussion in 'V7/V85/V9 Chat & Tech' started by Sam V Napoleon, Aug 30, 2021.

  1. Sam V Napoleon

    Sam V Napoleon Tuned and Synch'ed

    Joined:
    Sep 17, 2019
    Messages:
    42
    Likes Received:
    42
    Location:
    Pittsburgh
    I am experiencing the dreaded front end “hop” that has been well documented on other forums. “Hop” happens at 35-45 mph. Wheels are true and balanced, suspension has been adjusted, tires have been changed...nothing changes other than how I feel the “hop”. Has anyone else experienced this? And more importantly have you solved it?? Would upgrading the suspension fix it? I want to upgrade to Matris but may not if the problem will persist.
     
  2. Raven

    Raven High Miler GT Famiglia

    Joined:
    Jul 3, 2017
    Messages:
    749
    Likes Received:
    427
    Location:
    Lac Ste. Marie, Qc
    Brakes are the only culprit left. Bad rotors? Sticking caliper?
     
  3. vagrant

    vagrant GT Reference

    Joined:
    Aug 2, 2009
    Messages:
    1,118
    Likes Received:
    532
    Location:
    Gainesville, Ga. or Green Valley Az.
    Mine had the hop and it stopped when I put on the A41 Bridgestones 90/10. Now on the second set of them. Hop, no more!
     
  4. Sam V Napoleon

    Sam V Napoleon Tuned and Synch'ed

    Joined:
    Sep 17, 2019
    Messages:
    42
    Likes Received:
    42
    Location:
    Pittsburgh
    Interesting, I wonder why that would be.
     
  5. jr1967

    jr1967 Cruisin' Guzzisti

    Joined:
    Oct 29, 2008
    Messages:
    208
    Likes Received:
    49
    Could it possibly help to increase the damping on your rear shock. Just in case there is a teeter totter effect between front and rear with the pivot being the swingarm bearings. Just a thought and easy to try. Another quick check is front damping. I assume the springs front and back are too weak as usual but playing with damping settings cost nothing
     
  6. vagrant

    vagrant GT Reference

    Joined:
    Aug 2, 2009
    Messages:
    1,118
    Likes Received:
    532
    Location:
    Gainesville, Ga. or Green Valley Az.
    If anything too strong. I have one turn preload on front and I’m 240
     
  7. Sam V Napoleon

    Sam V Napoleon Tuned and Synch'ed

    Joined:
    Sep 17, 2019
    Messages:
    42
    Likes Received:
    42
    Location:
    Pittsburgh
    I guess I should say where I am on suspension at this point. Preload all out in the front, 12 clicks out on damping. I am second to highest notch of preload on the rear, damping one turn out. I weight 185 pounds without gear.
     
  8. Moto-Uno

    Moto-Uno Cruisin' Guzzisti

    Joined:
    Aug 7, 2016
    Messages:
    347
    Likes Received:
    120
    Location:
    Burnaby,B.C
    Well it's sounds like you've got quite a few combinations to try before you throw money at it :) . Peter
     
  9. vagrant

    vagrant GT Reference

    Joined:
    Aug 2, 2009
    Messages:
    1,118
    Likes Received:
    532
    Location:
    Gainesville, Ga. or Green Valley Az.
    Sam, I'd go back to no preload on the rear. I can't imagine any more than 1 with your weight.
     
  10. Sam V Napoleon

    Sam V Napoleon Tuned and Synch'ed

    Joined:
    Sep 17, 2019
    Messages:
    42
    Likes Received:
    42
    Location:
    Pittsburgh
    I tried that, no effect on the hop. I put it back up because that got me to target sag.
     
  11. Sam V Napoleon

    Sam V Napoleon Tuned and Synch'ed

    Joined:
    Sep 17, 2019
    Messages:
    42
    Likes Received:
    42
    Location:
    Pittsburgh
    Yea I don’t want to throw money at it and still have the hop. I wanted better suspension simply to have better suspension...but not better suspension with a hop haha.
     
    Moto-Uno likes this.
  12. kiwi dave

    kiwi dave GT Reference

    Joined:
    Oct 28, 2008
    Messages:
    2,186
    Likes Received:
    409
    Location:
    Auckland, New Zealand
    I'm wondering if the "hop" is being caused because you have too much pre-load. the shock is probably not moving (i.e. similar to a hard-tail) except on very large bumps.

    I'm with Vagrant, I'm heavier than you and I have no pre-load. Remember pre-load does not change the rate of the spring, only the height (assuming linear springs).
     
  13. vagrant

    vagrant GT Reference

    Joined:
    Aug 2, 2009
    Messages:
    1,118
    Likes Received:
    532
    Location:
    Gainesville, Ga. or Green Valley Az.
    What did you mean by "tires were changed?" Who did a re-balance?
     
  14. GerryAZ

    GerryAZ Tuned and Synch'ed GT Contributor

    Joined:
    May 24, 2021
    Messages:
    48
    Likes Received:
    27
    Location:
    Phoenix, AZ
    I agree with Vagrant and Kiwi Dave—I also have rear preload at the lowest setting and believe it would ride like a hard-tail at maximum preload without a passenger and luggage. Try reducing rear preload and then adjusting damping through entire range on both rear and front.
     
  15. Bisbonian

    Bisbonian Cruisin' Guzzisti

    Joined:
    Aug 21, 2009
    Messages:
    354
    Likes Received:
    62
    Location:
    Tucson, AZ
    To give a different opinion on rear preload, I'm running second from the highest notch and am happy with it and no ill effects.

    I changed the front tire recently and got a rumble from the front that felt a little hoppy, it seems to be calming down as the tire wears in though.
     
    Sam V Napoleon likes this.
  16. scottmastrocinque

    scottmastrocinque Scott Mastrocinque GT di Razza Pura

    Joined:
    Jun 26, 2011
    Messages:
    1,617
    Likes Received:
    1,333
    Location:
    Findlay, Ohio
    Please...

    Assuming that the wheel rim and tire are both undamaged, then wheel hop is caused by one thing, improper balancing. It is quite common for the hop to become more noticeable at a particular rotational speed.

    Remove the wheel and put it on a static balancing stand. I'l bet you that it has a heavy spot.
     
    BrianR and GTM® like this.
  17. Sam V Napoleon

    Sam V Napoleon Tuned and Synch'ed

    Joined:
    Sep 17, 2019
    Messages:
    42
    Likes Received:
    42
    Location:
    Pittsburgh
    I took the wheels to a local shop and had them re-balance the tires. I’ll be on the road for 4 days so we will see if that solved the problem.
     
  18. Sam V Napoleon

    Sam V Napoleon Tuned and Synch'ed

    Joined:
    Sep 17, 2019
    Messages:
    42
    Likes Received:
    42
    Location:
    Pittsburgh
    I have my preload that high because that’s what it takes for me to get to 50mm of rider sag. With all the preload out in the front I get 47mm of rider sag. I’ll be on the road for 4 days so I will have time to play with it and will try setting it back lower in the rear, but that would result in too much rider sag it seems. That being said...it’s a Guzzi so the rules seem to always be different lol.
     
  19. kiwi dave

    kiwi dave GT Reference

    Joined:
    Oct 28, 2008
    Messages:
    2,186
    Likes Received:
    409
    Location:
    Auckland, New Zealand
    Just put a heavier jacket on. That should do it. :wasntme:
     
  20. Sam V Napoleon

    Sam V Napoleon Tuned and Synch'ed

    Joined:
    Sep 17, 2019
    Messages:
    42
    Likes Received:
    42
    Location:
    Pittsburgh
    No luck adjusting the hop out after 4 days on the road and driving my brother mad with my suspension adjustments at every stop haha. Bike will be headed to the dealer for heated grip install and I’ll have them sort it out. I will update for those interested.
     

Share This Page