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+--- Thread: suspension sag (/showthread.php?tid=69834)
suspension sag - kylron - 03-08-14
After having issues with the front bt023 tyre I thought I'd check the rider sag.the bike has standard front suspension with an R6 rear shock from devilsyam.
On the front I got a reading of 28mm with the preloaded all the way in to position 1
On the rear I started with the preloaded on 4 with a sag of 50mm and got it down to 41mm with preloaded at 7
The rest of the front suspension is standard settings and the rear settings are as devilsyam supplied the shock.
My weight is 14.2 stone without riding gear although I was wearing it when checking the sag,I'm more of a you're than racer in riding style.
Do these figures seem OK ? Any advice appreciated.
Re: suspension sag - sadlonelygit - 04-08-14
On my R1 fronted gen1 static front sag is 12mm, & I'm a bit heavier than you. Hth
Re: suspension sag - Falco9 - 04-08-14
I've always used this set of parameters when measuring and setting my static sag and personally speaking my bikes have been spot on using these settings. I class myself as a reasonably fast road rider but certainly not Rossi
Measuring:
Preload on the spring/springs is very important,
because it affects the height of the motorcycle
and the fork angle. Consequently, handling characteristics
can be changed, even negatively.
Proceed as follows (it will be much easier if done
by two persons):
A Place the motorcycle on a stand.
B Lift up the rear end to a fully extended
position.
C Measure the distance, eg, from the
lower edge of the rear mud guard or
from a point marked by a piece of
tape, immediately above the rear wheel
axle, to the wheel axle. (R1)
D Make a similar measurement on the front
axle, e.g., from the bottom of the upper
fork crown to the front wheel axle.
The fork must also be fully extended. (F1)
E Allow the motorcycle (without rider) to
apply load on the springs and repeat
the measuring procedure. (R2, F2)
F Then take the same measurements
with the rider and equipment on the
motorcycle. It is important that the
rider has a correct riding posture,
so that the weight is balanced on the
front and rear wheel in the same way
as when riding. (R3, F3)
The measurements may not differ from the
following sizes:
Without rider:
Rear: 5-10 mm (R1-R2)
Front: 25-30 mm (F1-F2)
With rider:
Rear: 30-40 mm (R1-R3)
Front: 35-48 mm (F1-F3
Re: suspension sag - kylron - 04-08-14
Measured it again,front set up as follows.
Preload on line 2
Rebound 4 clicks out
Comp 10 clicks out
Static sag 19mm
Rider sag 31mm
Rear with R6 shock
Preload on position 5
Static sag 17mm
Rider sag 43mm
Measurements taken as described above.
Re: suspension sag - Tmation - 04-08-14
Looks like you have too much rear sag, a good starting point would be 35mm (with rider, feet on pegs and someone holding bike) and go harder or softer as required.
I would also soften the front to 35-40mm with rider as above.
Adjusting the damping is a bit harder without knowing your riding style or the roads around you. My advice is to find a good suspension specialist close by and pay the £40-50 to set it up for you.
Have a look here [size=78%]http://www.gostar-racing.com/information/motorcycle_suspension_set-up.htm[/size]