that old chestnut - forking 40mm forks

[suprize]

can anyone tell me which holes in the 40mm fork damper rod do what? are the lower holes comp and the upper rebound???

 

[ajcmbrown]

I'm keen to know too, I'm sure my '85 forks are the same.

 

[Down Under XC]

Hi Surprize,
they are just passages for oil to flow thru and then are pushed up thru top out washer, I am not sure there is much science to it, the Xc had very nicelychamfered holes but not sure it does much. level and viscosity or even just viscosity would appear to be determining factor.

 

[Krudd]

Here's a link to Race Tech that explain "Damping Rod Anatomy".

http://racetech.com/html_files/dampingrodforks.html

 

[GaryM]

Husky forks are a bit different. Please note the early 80s have a taper in the rod. This taper was removed in 86. The 86 87 almost works in reverse as their
is a floating check valve in cage, along with a spring and check ball valve at the very bottom of the damping rods. Just examples of differant ways to control
oil flow. Taper, holes , cage valves, check valves and then add oil weights and volume
amounts

Oh all 86 forks may not have all the changes.

 

[jimspac]

Here's a link to Race Tech that explain "Damping Rod Anatomy".

http://racetech.com/html_files/dampingrodforks.html

Thank you for the link. I would have answered the first question if I could have verified the answer. I do not deal with it often enough to have it committed to memory

 

[jimspac]

Husky forks are a bit different. Please note the early 80s have a taper in the rod. This taper was removed in 86. The 86 87 almost works in reverse as their
is a floating check valve in cage, along with a spring and check ball valve at the very bottom of the damping rods. Just examples of differant ways to control
oil flow. Taper, holes , cage valves, check valves and then add oil weights and volume
amounts

Oh all 86 forks may not have all the changes.

The WRs do not. I can confirm that.

 

[suprize]

Shimples...