Author Topic: An overdamped, undersprung question  (Read 1958 times)

Offline ohiorider

  • Gaggle Hero
  • *****
  • *
  • *
  • *
  • Posts: 8088
  • "You can't fight in here - this is the War Room."
An overdamped, undersprung question
« on: August 20, 2015, 01:17:44 PM »
My GRiSO 8vSE rides roughly, especially the forks.  I've set compression and rebound damping as low as possible, but no joy.

Here's the question.  If I were to pull the forks and take them to a quality suspension shop, can they remove the springs, compress the fork legs, and measure the factory installed fork oil level?  The quality of my Triumph T100 ride was dramatically affected by fork oil level.  I would measure the level using (of all things) a turkey baster that I'd marked with hash marks every 10mm to accurately remove fork oil.  I'd start at stock level, remove 10mm, reinstall forks, ride, and repeat if necessary.  Of course, those were cheap damper rod forks, easy to remove the innards.  I think I'd need special tools to work on the Showa forks on the GRiSO, and would have to use a shop to disassemble and reassemble.

Anyway, I'd like to try adjusting Guzzi fork oil level to see if I could arrive at a level that would result in a more controlled and compliant ride.  I'm not into throwing $1200-1500 into the front end of this bike.
Main ride:  2008 Guzzi 1200 Sport (sold July 2020)
2012 Griso 8v SE (sold Sept '15)
Reliable standby: 1991 BMW R100GS
2014 Honda CB1100 (Traded Nov 2019)
New:  2016 Triumph T120 (Traded Dec 2021)
New:  2021 Kawasaki W800

Vasco DG

  • Guest
Re: An overdamped, undersprung question
« Reply #1 on: August 20, 2015, 01:35:06 PM »
Yes. The factory also specify 10W oil I believe. On mine I use 5W and 65ml less than specified. I also run the springs almost fully preloaded. It's a lot better, still a long way from perfect but it's pretty good.

Pete

Offline ohiorider

  • Gaggle Hero
  • *****
  • *
  • *
  • *
  • Posts: 8088
  • "You can't fight in here - this is the War Room."
Re: An overdamped, undersprung question
« Reply #2 on: August 20, 2015, 02:42:16 PM »
Thanks, Pete.  I recall on the Triumph just a touch more air space for cushion in the forks made a considerable difference.

Bob
Main ride:  2008 Guzzi 1200 Sport (sold July 2020)
2012 Griso 8v SE (sold Sept '15)
Reliable standby: 1991 BMW R100GS
2014 Honda CB1100 (Traded Nov 2019)
New:  2016 Triumph T120 (Traded Dec 2021)
New:  2021 Kawasaki W800


NEW WILDGUZZI PRODUCT - Moto Guzzi Door Mat
Receive donation credit with door mat purchase!
Advertise Here
 


NEW WILDGUZZI PRODUCT - Moto Guzzi Door Mat
Receive donation credit with door mat purchase!
Advertise Here