Fork oil

[Milco]

Just put new seals on forklegs. What oil do I have to use, 30W like BDM subscribes or 20W?
Is it 10 OZ (or ca. 300 ml) each tube?

 

[standuprick]

On my 04 mastiff they called for 10 weight. I tried 10w.15w and 20w. Ended up with 30w. It depends on how you like your suspension set up. If it handled fine for you put what you had in it. You can also adjust your preload by adding or cutting the spacer in your forks. There is no "do this and its perfect" I had my forks of atleast 10 times before I was happy but Im very picky on suspension set up. First, for safety, secondly for comfort. 20w will make your rebound "suspension travel up" faster than 30w. It will affect your compression "down stroke" a bit too. Preload on the spring will affect how the bike sits. How the bike reacts to bumps and also your rebound. There is alot of factors with suspension. Again, if you were happy with it before put what BD specd. If you want the front end to rebound quicker go with 20w. Good luck.

 

[Milco]

OK, and the 10 OZ each is correct for a 2007 K-9?

 

[Olde Man]

I put Amsoil Shock therapy Medium # 10 in my K9 on a respected suppliers recomendation. It caused a horrible and dangerous second tire bounce like a car without shocks. I replaced it with BelRay 30w shock fluid and now all is well.

 

[standuprick]

I checked the 07 owners manual. 10 oz for the chopper, k9, and mastiff. They call for 30w. Personally I would put 30w in it slows the rebound down. Even though it makes the compression slightly stiff.

 

[07bigdog]

I used 20wt Belray in mine. Yes 10 oz. per side.