Penske Racing Shocks 8900 Series - Manual (Page 14)

Race Track Tuning
Road Race Track Tuning: Symptoms and Suggestions
A. Change only one adjustment at a time, and send the rider out for
evaluation and feedback.
B. Take notes: Keep track of rider comments, lap times, tire conditions, and
current weather conditions.
C. Be patient, go back to your original settings if you get lost.
Symptom: Tuning List:
Harsh over bumps:
1. Go softer with low speed compression, 2 to 4 clicks at a time (counter
clockwise)
2. Go softer with high speed compression, 1 to 2 clicks at a time.
3. Increase rear spring sag, -1/2 to 1 turn at a time on spring perch.
4. Change to a softer spring rate.
5. Note: Too soft on compression can bring about a harsh feeling by
allowing too much shock travel.
Excessive wheel spin exiting corners:
1. Repeat above steps.
2. Rebound can be too fast, allowing the rear to unload and spin the tire.
Use caution when changing rebound.
Wallowing exiting corner:
1. Stiffen low speed compression (clockwise).
2. Stiffen high speed compression, 1 to 2 clicks at a time.
3. Decrease rear spring sag.
4. Slow down rebound, 1 to 2 clicks at a time (clockwise).
5. Change to a stiffer spring rate.
Slow turn-in:
1. Raise fork legs in triple clamps
2. Increase rear eyelet length, 1/2 to 1 turn at a time. Cannot exceed
12mm of thread exposed.
3. Soften fork compression
4. Increase front fork sag
5. Speed-up rear rebound.
Mid corner push - front:
1. Stiffen rear low speed compression
2. Slow down fork rebound
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