|
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 |
|
 |
