I've fitted a new front & newly serviced Ohlins shock to the rear but I'm having difficulty with the sag/ride height settings.
The bike is a std 1150GS with no panniers and a 11st 5lb (3lb after a dump) rider and there's about 1/2 a tank of fuel in it.
I've attached measuring tapes to the fork leg and rear of the frame so they don't move and marked the measuring point on the lower fork and bevel housing for consistent measurements.
Unloaded sag is measured with the wheels off the floor and the rear hydraulic pre-load adjuster is set mid point which only leaves me with half the range to play with.
Unloaded dimension is measured at R1 539mm Rr and F1 740mm Fr
Free sag measured at R2 521 (18mm sag Rr) and F2 696 (44mm sag Fr)
Ride height measured at R3 494 (45mm sag Rr) and F3 687 (53mm sag Fr)
I've looked at the prescribed sag measurement but they appear significantly different.
With the rear hydraulic preload adjuster turn up to max the free sag/ride height figures are as follows:-
Free sag measured at R2 527 (12mm sag Rr) and F2 696 (44mm sag Fr)
Ride height measured at R3 504 (35mm sag Rr) and F3 688 (52mm sag Fr)
Prescribed dimensions are:-
Free sag (R1-R2) is 5–15mm and (F2-F2) 20-30mm
Ride height ((R1-R3) is 25-35mm and (F1-F3) 30-40mm.
Even with the rear hydraulic adjuster up to max I am barely achieving the correct rear ride height figure and it leaves me no further adjustment for additional weight and the rear shock is not designed with pre-load adjustment for the spring, so it would effectively need a new/heavier spring which I find hard to believe me being a slim whippet and all.
The front is adjustable on spring pre-load so I can just up the pre-load on that end to achieve the correct figures.
I find it hard to believe that the shock would be this far out from new/full service.
When I first bought the rear shock and prior to service it felt like a bag of shit so I thought a full service was in order.
I’ll set the front pre-load to correct the Fr figures but I can’t do anything to the rear shock as I’m out of adjustment.
Any thought before I send it back to FTR
The bike is a std 1150GS with no panniers and a 11st 5lb (3lb after a dump) rider and there's about 1/2 a tank of fuel in it.
I've attached measuring tapes to the fork leg and rear of the frame so they don't move and marked the measuring point on the lower fork and bevel housing for consistent measurements.
Unloaded sag is measured with the wheels off the floor and the rear hydraulic pre-load adjuster is set mid point which only leaves me with half the range to play with.
Unloaded dimension is measured at R1 539mm Rr and F1 740mm Fr
Free sag measured at R2 521 (18mm sag Rr) and F2 696 (44mm sag Fr)
Ride height measured at R3 494 (45mm sag Rr) and F3 687 (53mm sag Fr)
I've looked at the prescribed sag measurement but they appear significantly different.
With the rear hydraulic preload adjuster turn up to max the free sag/ride height figures are as follows:-
Free sag measured at R2 527 (12mm sag Rr) and F2 696 (44mm sag Fr)
Ride height measured at R3 504 (35mm sag Rr) and F3 688 (52mm sag Fr)
Prescribed dimensions are:-
Free sag (R1-R2) is 5–15mm and (F2-F2) 20-30mm
Ride height ((R1-R3) is 25-35mm and (F1-F3) 30-40mm.
Even with the rear hydraulic adjuster up to max I am barely achieving the correct rear ride height figure and it leaves me no further adjustment for additional weight and the rear shock is not designed with pre-load adjustment for the spring, so it would effectively need a new/heavier spring which I find hard to believe me being a slim whippet and all.
The front is adjustable on spring pre-load so I can just up the pre-load on that end to achieve the correct figures.
I find it hard to believe that the shock would be this far out from new/full service.
When I first bought the rear shock and prior to service it felt like a bag of shit so I thought a full service was in order.
I’ll set the front pre-load to correct the Fr figures but I can’t do anything to the rear shock as I’m out of adjustment.
Any thought before I send it back to FTR
