Join Date: Jul 2011
Location: So Cal High Desert
There are a lot of posts on HD Forums about changing the oil and an improvement but after I swapped out mine I played with changing the oil and did not feel any difference. In general the stock shocks are a very old and basic design and the dampening in them is very limited regardless of the oil used. There may be some improvement is that heavier oil may slow the response of the shock (increase dampening).
If you go to Howards page at www.motorcyclemetal.com
he used to have a good write up on this as well as a breakdown of the stock shocks so you can see how basic the dampening setup is in them.
2011 FLTRX, 103 Power Pak, Stage 1 with Power Vision and V & H Power Duals, SE A/C, Cee Bailey TRSSC 15", Progressive 940 rear,Mono Tubes Front, C & C Fastback Seat and some extras in black here and there
2005 Annv FLSTFI, Stage II 95 kit, lowered 2" - SOLD
2004 Road King Custom - SOLD
2004 Sportster 1200 r, Stage 1 - SOLD