LAISAWeave / instability at high speed on straights
When your bike shows "Weave / instability at high speed on straights", these are the most likely causes - ranked by relevance: Sag, Preload, chassis. LAISA separates setup causes (adjusters, components) from riding technique.
Short answer for this problem
- Recommended starting point
- Check first: Shock: Sag
- Most important change
- Smallest documented change: 1 mm - loaded, rider in gear
- Why
- Ride-height/sag balance is off (rear too high) - set sag first.
- How to test it
- Read the current value off the bike and compare it with the recommended one. Write it down before you change anything.
- Source
- LAISA diagnosis catalogue, drafted automatically and editorially released Methodology →
- Last reviewed
- No review date documented
The order comes from the stored strength of the symptom-cause link in the catalogue - per symptom, not across symptoms. These are not probabilities and not measurements.
Suspension
Why this could fit: Ride-height/sag balance is off (rear too high) - set sag first.
How to check it: Read the current value off the bike and compare it with the recommended one. Write it down before you change anything.
Smallest change: 1 mm - loaded, rider in gear
Why this could fit: Too much rear preload raises the rear and makes the steering light/nervous at speed - reduce it.
How to check it: Read the current value off the bike and compare it with the recommended one. Write it down before you change anything.
Smallest change: 1 mm
Why this could fit: Front rebound is too fast and lets the front pulse into a weave - slow it slightly.
How to check it: Read the current value off the bike and compare it with the recommended one. Write it down before you change anything.
Smallest change: 1 click - clicks out from fully closed
Hardware
Why this could fit: Steering-damper setting or condition - add damping or service it.
How to check it: Check the part's condition and that it is properly seated before touching the setup.
Free. Pick bike, track and riding style.
Related symptoms
A starting point to verify on the bike - not a safety guarantee. Change one thing at a time and check on track.