LAISARS 660 2021
Track: Lime Rock Park
← Back to Lime Rock ParkTaken over from the track: Asphalt · Fast · dry
Aprilia RS 660 2021 - 75 kg, Intermediate, Neutral, Lime Rock Park
Set this first
Shock: Rebound
- Stock value
- 5 clicks
- Recommended
- 6 clicks
- Change
- 1 click softer than stock
clicks out from fully closed
Reason: condition Lime Rock Park
How to test it: Change Rebound only, nothing else. Then ride the same section or the same number of laps as before and watch whether exactly the behaviour that bothers you changes. If it gets worse or less settled, put the value back.
- Shock: Rebound6 clicks1 click softer than stockcomputed
- Fork: Rebound19 clicks1 click softer than stockcomputed
- Transmission: Rear sprocket42 teeth1 tooth less than stockcomputed
- Tire: Front tire pressure2.5 barOEM
- Tire: Rear tire pressure2.9 barOEM
12 confirmed settings available.
Released reference setup, editorially reviewed · Moderately documented
Referenced (not linked):- Aprilia RS660 official technical datasheet (storeusa.aprilia.com) + OEM chain/sprocket spec
Last reviewed: 29 Jul 2026
A starting point to verify on the bike - not a safety guarantee. Change one thing at a time and check on track. How LAISA derives this →
All recommended changes
In order, biggest deviation from the stock value first. Take them one at a time.
- Shock: Rebound1 click softer than stock
5 clicks6 clicksclicks out from fully closed
Reason: condition Lime Rock Park
How to test it
Change Rebound only, nothing else. Then ride the same section or the same number of laps as before and watch whether exactly the behaviour that bothers you changes. If it gets worse or less settled, put the value back.
- Fork: Rebound1 click softer than stock
18 clicks19 clicksclicks out from fully closed
Reason: condition Lime Rock Park
How to test it
Change Rebound only, nothing else. Then ride the same section or the same number of laps as before and watch whether exactly the behaviour that bothers you changes. If it gets worse or less settled, put the value back.
- Transmission: Rear sprocket1 tooth less than stock
43 teeth42 teeth
Reason: condition Lime Rock Park
How to test it
Change Rear sprocket only, nothing else. Then ride the same section or the same number of laps as before and watch whether exactly the behaviour that bothers you changes. If it gets worse or less settled, put the value back.
All technical values
Complete settings, technical data, components, gearing and geometry - including the adjusters that exist on the bike but do not carry a confirmed value yet.
| BrakeBrembo Radial Monobloc 4-Piston Caliper | ||
| ChainOEM Chain | ||
| Chain length | 114 links | OEM |
| ChassisOEM Aluminium Twin-Spar Frame (RS 660) | ||
| Fork height in clampstube protrusion above top clamp | 2 ring | OEM |
| ClutchOEM Wet Slipper Clutch | ||
| ECUOEM Engine Management | ||
| ForkKYB 41 mm Inverted Fork (Preload + Rebound) | ||
| Oil heightfrom top, fully compressed, no spring | 105 mm | OEM |
| Preload | 0 turns | OEM |
| Reboundclicks out from fully closed | 19 clicks▲ +1 | computed |
| Spring rate | 8 N/mm | OEM |
| HandlebarOEM Handlebar | ||
| ShockOEM Monoshock (Preload + Rebound) | ||
| Reboundclicks out from fully closed | 6 clicks▲ +1 | computed |
| Spring rate | 140 N/mm | OEM |
| SwingarmOEM Aluminium Swingarm | ||
| TirePirelli Diablo Rosso Corsa II | ||
| Front tire pressure | 2.5 bar (36.26 psi) | OEM |
| Rear tire pressure | 2.9 bar (42.06 psi) | OEM |
| TransmissionOEM Final Drive | ||
| Front sprocket | 17 teeth | OEM |
| Rear sprocket | 42 teeth▼ -1 | computed |
After the ride
Tested a change? Record what happened. LAISA stores it against this bike and this condition. The recommendation above does not adapt to it automatically yet.
About this baseline
For a 75 kg Intermediate rider with a Neutral style, the baseline for the Aprilia RS 660 2021 at Lime Rock Park shifts 3 of 12 computed settings away from the OEM standard. The biggest shifts: Rebound 6 clicks (+1 vs OEM), Rebound 19 clicks (+1 vs OEM). All values are computed from OEM defaults and your rider and condition factors.
Value provenance: OEM = manufacturer specification · verified = confirmed by an expert · reviewed = editorially reviewed reference · community = confirmed by the community (median of at least three public setups) · computed = automatically derived by the LAISA engine. Automatically extracted and unconfirmed values never appear on public pages.
Next steps
Dial in your riding technique
Skills that change how the bike behaves - often the real fix before any clicker.
Explore techniqueMatching protective gear
The right setup is half the job - the other half is protective gear matched to the discipline and conditions.
Gear for these conditionsUpgrades that fit
Optional aftermarket parts for this bike - the setup above comes first, these are next.
Setups for this bike
1 setupsReference setups
Verified factory and expert setups.Related
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Frequently asked questions
What tire pressure is recommended for the Aprilia RS 660 2021?
As a starting point: 2.5 bar front, 2.9 bar rear - computed for a 75 kg Intermediate rider. Check cold and adjust in small steps by feel.
What gearing (sprockets) does the Aprilia RS 660 2021 run?
As a starting point, 17 teeth front / 42 teeth rear. For more acceleration go larger at the rear (or smaller at the front); for more top speed, the reverse.
Are these values safe to ride?
Baseline values are starting points generated from OEM defaults, rider weight, skill, style and conditions - not safety guarantees. Verify on the bike, adjust step by step and ride within your limits.
Baseline values are starting points generated from OEM defaults, rider weight, skill, style, and condition - or lifted from an expert/verified setup where one exists (see the provenance badge). They are not safety guarantees. Verify on the bike and ride within your limits.