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Unfortunately, KTM have changed the spring and/or shock from my last bike so my previous changes were not transferable. I have therefore had to go through the whole exercise again from scratch.

There are two tests:

Test
Amount of suspension movement between:
- on the centre stand and
- off the stand, the wheels resting on the ground
1 Static sag must be 15-20mm with no rider
2 Loaded sag must be 90-100mm with rider and luggage

All the measurements are taken from the top of the rear axle nut to the bottom right hand corner of the Alfie Cox sticker on my top box.

If too much preload is required to achieve 2 (the loaded sag), the static sag will be less than 15mm (because the spring has been compressed too much) so a stronger spring is required.

 
Preload
Sag
 
Turns
MM
Height
Static
Loaded
Requirement      
15-20 mm
90-100 mm
1. In the UK - 70/260 Spring (260mm spring, 1 turn = 1.75mm preload)
Static - Wheel off ground
-
0
750
0
-
Static - Wheel on ground
-
0
730
20
-
Me Only
13
23
655
-
95
Me + Luggage
- 1st Go
17
30
640
-
110
- 2nd Go
20
35
655
-
95
Therefore 3 turns = 15mm, so 1 turn = 5mm sag
2. In Mexico with the Bicycle - 70/260 Spring - Abandoned Plan A
Static - Wheel off ground
-
0
745
0
-
Me + Luggage + Bicycle
20
35
615
-
130
- Estimate
26
-
-
-
100
3. In Argentina - New 75/260 Spring
Static - Wheel on ground
-
690
-
- 1st Go
14
600
-
90
- 2nd Go
17
610
-
80 wrong way

 

 


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