The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: NorR65 on August 20, 2011, 10:02:31 AM
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A while ago I bought a set Hagon shockabsorbers because the 30 years old original ones was really soft.
But I find the Hagons quite stiff. Do you know if Hagons are preset soft, middle or hard from the factory?
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Did you think it was the springs that were hard or the damping.
Can't do anything about the damping but it wouldn't cost much to change the springs.
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Not familiar with Hagon shocks, but is there a spring preload adjustment on the shock ????
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Not familiar with Hagon shocks, but is there a spring preload adjustment on the shock ????
The Hagons I purchased for my R65 have a 3-position adjustment ring to preload the springs.
My purchase was with Dave Quinn. http://www.davequinnmotorcycles.com/ He always asks for rider weight and typical bike load-out, then installs the correct spring weight. I roll with 100# springs. Stock Hagon springs are 110#.
This info references the Hagon Twin Shocks listed at the top of the display page.
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Thanks for your help
I must have the standard 110 Hagon spring. I guess I have a 3 way spring preload adjustment. I did get a adjustment C-spanner with the shocks. I have tried to adjust preload, with no success. Maybe I have to use more force. The old BMW shocks was easy to adjust, may be because the springs was to soft.
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The old BMW shocks was easy to adjust, may be because the springs was to soft.
I love those adjustment handles. I sometimes ride to work with a passenger then ride back without one and it's so easy to adjust the shock pre-load.
I've never seen a published figure for our original rear spring rates. I just measured mine and calculated the rate at 104 lb/in. Although the spring rate formula is precise it's very sensitive to measuring the spring accurately which is not so easy and I think I got 114 lb/in last time I did this.
Either way the originals seem to be in the same ball park as the Hagons.
Damping rates are something else though and we all know from experiments with fork oil weight that increased damping rates can make the same springs seem harsh. If your old shocks seemed soft it's probably because the dampers had gone rather than the springs. Even new original Boge units would seen stiffer by comparison.
I like the site Monte bought his shocks from. Even Hagons own site doesn't give anything like that level of information or choice.