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Old 04-27-2013, 11:07 AM   #796
Stagehand
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sag should be measured as is, regardless of length in a previous life.
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Old 04-27-2013, 11:37 AM   #797
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There are two types of sag, static and dynamic.

Static would be only the bike and dynamic with the driver on the bike.

Measure sag high and low. There could be a lot of difference between the two. specially with a fork that has a lot of stiction.

First measure the reference : Wheel off the ground.
Push the bike in and let go as slow as possible. That would be sag low
Lift the bike an let is sag as slow as possible. That would be sag high.

If there is a lot of difference between Sag high and low you have a lot of stiction in the fork.

It might help to all measure the same things when we would like to check and compare
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Old 04-27-2013, 01:20 PM   #798
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Just re-torqued my steering head bearings... better now.
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Originally Posted by Stagehand
your bike is suitably dirty. Well done.
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Old 04-27-2013, 01:26 PM   #799
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I dunno....I forgot??? I'll get a helper, Brad, over here after finals and we'll measure it up.
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Old 04-27-2013, 01:31 PM   #800
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Quote:
Originally Posted by hardwaregrrl View Post
I dunno....I forgot??? I'll get a helper, Brad, over here after finals and we'll measure it up.


I did mine by leaning my bike against a pillar, for both the no-rider and rider measurements
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Quote:
Originally Posted by Stagehand
your bike is suitably dirty. Well done.
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Old 04-27-2013, 04:04 PM   #801
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I guess another thing I need to take into account is most of you have the HPN tank if I'm not mistaken. No word on when the new HPMGuy triples will be done yet :(
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Old 04-27-2013, 04:08 PM   #802
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I guess another thing I need to take into account is most of you have the HPN tank if I'm not mistaken. No word on when the new HPMGuy triples will be done yet :(
Well, I have an HPN as does Jenna... who else is posting here with their results? Ontic has an even larger tank that is aluminum...
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Quote:
Originally Posted by Stagehand
your bike is suitably dirty. Well done.
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Old 04-27-2013, 07:07 PM   #803
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Quote:
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I guess another thing I need to take into account is most of you have the HPN tank if I'm not mistaken.
Yeah, you would want to consider everything about your intended outcome- like Solo said, I've got a big 45 liter aluminium Sauer tank and I also like to use a tank bag- I have a nice Held modular tank bag that fits my Sauer tank like a glove. With gear on the back I like to have more weight on the front to keep things balanced- and most of the time I will have gear on the back- thus I have hopefully sprung my forks and my Ohlins shock with these needs in mind.
I don't plan to always fill that big tank but like the HPN tank they carry a lot of their weight low, especially when lower on fuel.

Saying all that though, I have only test ridden my re-sprung front end with the stock tank and no traveling gear and my project has been in stall for a while, hopefully to start up again very soon (moved house, back from work overseas, and now saving a little money again).

With the Ohlins on the back and the shortened WP50's with .60 springs and with no gear and the stock tank half full- the bike feels quite firm but very nice to me- within the ballpark (before fine tuning rebound and damping) that I would want it for a fun little day ride (mostly road) with no gear. Again though, I like the bike to feel a bit firmer than some.

Only time will tell if these are the right rate.
From my own research and thoughts I was ballparking .55 to .65 before I approached Jeff Slavens and he recommended .60 for my needs, so I was happy with that.
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Old 04-28-2013, 10:48 AM   #804
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Here's my measurements using the Ohlins method:

Front suspension (measured from the top of the axle land to the top of my hand guard on the right side)
F1: bike on stand with forks fully extended: 36.00"
F2: bike on ground without rider: 34.50"
F3: bike on ground with rider: 34.00"

Free sag: 1.50" (19% using the BMW spec travel of 7.87")
Ride height: 2.00" (25%)
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Quote:
Originally Posted by Stagehand
your bike is suitably dirty. Well done.
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Old 04-28-2013, 06:57 PM   #805
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Ok

F1 fully extended: 838mm
F2 bike only (static): 806mm
F3 rider geared up: 784mm

Forgot but I only have 2 gallons of fuel

Rear

R1 extended: 489mm
R2 bike only (static): 464mm
R3 rider geared up: 432mm
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Old 04-28-2013, 09:03 PM   #806
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Calcs below:

Quote:
Originally Posted by hardwaregrrl View Post
Ok

F1 fully extended: 838mm ~15%
F2 bike only (static): 806mm ~26%
F3 rider geared up: 784mm

Forgot but I only have 2 gallons of fuel

Rear

R1 extended: 489mm
R2 bike only (static): 464mm ~15%
R3 rider geared up: 432mm ~34%
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Quote:
Originally Posted by Stagehand
your bike is suitably dirty. Well done.
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Old 04-29-2013, 04:05 AM   #807
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Quote:
Originally Posted by SOLO LOBO View Post
Calcs below:
Thanks SOLO. Reading the race tech bible right now and trying to wrap my head around where things are at for me. Sorry I am unable to be a better source for info. I just ride the thing and fix it when I break it
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Old 04-29-2013, 11:21 AM   #808
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Somethinv tells me your front preload is a little high
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Old 05-01-2013, 11:40 AM   #809
Sauerkrautman
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Hi,

so now my bike is nearly complete and ready for the next problem.



Sadly, the stiction of the fork makes it completely unusable. I put 510ml 5W oil in each leg of the fork, but still not better (I thought a little bit of oil may help ).
When I open the caps at the top and push the front wheel upwards (with all of the inner parts of the fork) it goes up and down smooth and with little stiction. Even without the wheel the fork falls slowly down (there seems to be too little oil inside für the dampers to work). But when I put everything back together, it sticks again. I can jump up an down at the pegs and nothing happens at the front. The "classical" reasons for this problem should be excluded.

How much oil do you use with the shortened forks? As I got the forks, there were 650ml of dirt-oil-water-emulsion inside of each leg. But I'm not sure, if this is too much because of the shortened travel.

Regards,
Richard
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Old 05-01-2013, 11:54 AM   #810
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Originally Posted by Sauerkrautman View Post
How much oil do you use with the shortened forks? As I got the forks, there were 650ml of dirt-oil-water-emulsion inside of each leg. But I'm not sure, if this is too much because of the shortened travel.

Regards,
Richard
I can email you the scanned factory manual, but don't know the correct oil amount, nor the oil level spec
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Quote:
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your bike is suitably dirty. Well done.
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