Penske Racing Shocks 8975-STREET - Manual (Page 5)

PS‐8975‐STREET (Double Adjustable) 2013/2014
5
To Set Preload:
The adjuster (gold or black with holes) is located on the top of the main spring. The adjuster is threaded
and moves up and down the body of the shock compressing or releasing the spring pre‐load. You will
need a 3mm Allen Key to unlock and lock the adjuster when adjusting preload.
Preload Adjuster Tool: We have supplied you with a preload adjuster tool
(steel pin with an angled head). In order to use this tool properly put the
smaller angled tip into the hole of the adjuster and grip the longer part of
the tool with your hand.
The shock should currently be set to a preload based on the personal information you gave us about
your riding. A good baseline setting is .500” (1/2” or 12mm) of preload. What does that mean: If the
spring is 5” (127mm) in total length with .500” (12mm) of preload the spring should measure about
4.500” (115mm) compressed.
To adjust the spring Stiffer you would turn the spring down the body (tighter). This motion would be
normally from Right to Left (similar motion to tightening most applications). In reverse, to adjust the
spring Softer you would turn the spring up the body (looser). This motion would normally be from Left
to Right.
Approximately One (1) turn of the spring is equal to .150” (3‐4mm) of preload. If your 5” (127mm)
spring was set with .500” (12mm) preload and you turned the spring down (Stiffer) two complete turns
the total length of the spring should measure 4.300” (110mm). In reverse if you turned the spring up
(Softer) two complete turns it should measure 4.700” (119mm).
A tip: Mark the Preload Adjustment Collar with some paint or something so you can tell one complete
turn. A sharpie will work too.