Penske Racing Shocks 8975-STREET - Manual (Page 11)

PS‐8975‐STREET (Double Adjustable) 2013/2014
11
Street Tuning: Symptoms and Suggestions
A. The simplest way to adjust in your suspension is to find a loop approximately 5 miles long where
you can create multiple situations, sweeping corners, tight or braking corners, harsh bumps. It is
also ideal for you to find a quick or easy stopping place (fuel station, bank, food store) Ride on
the factory pre‐settings, make changes, evaluate changes and continue and repeat in order to
dial in “your” ideal setting.
B. Write down your original or current best setting. Then change only one adjustment at a time.
Be patient, go back to your original settings if you get lost.
C. Bring your tools to adjust, also bring a flashlight to see shaft travel of the shock.
Harsh over bumps: If shaft travel is not within 1/8” from bottom (Black) bump rubber:
1. Go softer with compression, 2 to 4 clicks at a time (counter clockwise), if better continue going
softer.
2. Reduce rear spring preload (increase sag) ‐1 turn at a time on spring perch.
3. Change to a softer spring rate.
Harsh over bumps: If shaft travel is clearly into the bottom (Black) bump rubber:
1. Too soft on compression can bring about a harsh feeling by allowing too much shock travel and
compressing the bump rubber. Go Stiffer with compression, 2 to 4 clicks at a time (clockwise), if
better continue going stiffer.
2. Increase rear spring preload (reduce sag) + 1 turn at a time on spring perch.
3. Change to a stiffer spring rate.
Wallowing exiting corner:
1. Stiffen compression, 2 clicks at a time. (clockwise)
2. Increase rear spring Preload (reduce sag). 1 turn
3. Slow down rebound, 2 clicks at a time (clockwise).
4. Change to a stiffer spring rate.
Slow turn‐in:
1. Raise fork legs in triple clamps – More fork tube sticking out of top of triple clamps.
3mm‐5mm per change
2. Increase rear eyelet length, 1/2 to 1 turn at a time. – If applicable
*Cannot exceed 12mm of thread exposed.
3. Soften fork compression
4. Reduce fork Preload (Increase sag)
5. Speed‐up rear rebound. Counter Clockwise or (‐)
Mid corner push ‐ front:
1. Stiffen rear compression
2. Slow down fork rebound