defective klr oil filters

DSN_KLR650
Dirk Beer
Posts: 123
Joined: Sat Mar 06, 2004 6:09 am

rear spring rate confusion

Post by Dirk Beer » Thu Feb 03, 2005 2:31 pm

A question for the suspension experts: My stock rear suspension has 1" of static sag, and 4" total sag when I sit on it. I would like to get a spring that results in 1" static and 3" total sag with me on it. effective spring rate (stock) = x lbs / (4"-1") = x/3 lbs/in effective spring rate (desired) = x lbs / (3"-1") = x/2 lbs/in where x lbs is the amount of weight my butt adds to the rear. So I need a spring that is x/2 / x/3 = 3/2 = 1.5 times stiffer than stock. If the stock is 300 lbs/in (according to the FAQ), that would mean I should get a 450 lbs/in spring (if I use exact measurements I get something closer to 400lbs/in). That doesn't match the usual recommendation of the list for somebody my weight (245lbs w/ gear), which is to get a 500 lbs or 550 lbs straight-rate spring. Is my logic right? Or is my stock spring possibly stiffer than 300 lbs? looking forward to Julian tech day, Dirk A18

Lujo Bauer
Posts: 750
Joined: Wed Jan 23, 2002 5:07 pm

rear spring rate confusion

Post by Lujo Bauer » Thu Feb 03, 2005 2:46 pm

Your logic is right. The super-stiff spring from Progressive just happens to be the most marketed aftermarket option. Some of us have 400 or 450 lbs/in springs from eshocks.com. -Lujo Dirk Beer wrote:
> A question for the suspension experts: > > My stock rear suspension has 1" of static sag, and 4" total sag when I > sit on it. I would like to get a spring that results in 1" static and > 3" total sag with me on it. > > effective spring rate (stock) = x lbs / (4"-1") = x/3 lbs/in > > effective spring rate (desired) = x lbs / (3"-1") = x/2 lbs/in > > where x lbs is the amount of weight my butt adds to the rear. So I > need a spring that is > > x/2 / x/3 = 3/2 = 1.5 > > times stiffer than stock. If the stock is 300 lbs/in (according to the > FAQ), that would mean I should get a 450 lbs/in spring (if I use exact > measurements I get something closer to 400lbs/in). > > That doesn't match the usual recommendation of the list for somebody > my weight (245lbs w/ gear), which is to get a 500 lbs or 550 lbs > straight-rate spring. Is my logic right? Or is my stock spring > possibly stiffer than 300 lbs? > > looking forward to Julian tech day, > > Dirk > A18
[Non-text portions of this message have been removed]

Krgrife@aol.com
Posts: 806
Joined: Thu Apr 06, 2000 9:32 pm

rear spring rate confusion

Post by Krgrife@aol.com » Thu Feb 03, 2005 4:09 pm

In a message dated 2/3/2005 12:42:29 P.M. Pacific Standard Time, rdbeer@... writes: If the stock is 300 lbs/in (according to the FAQ), that would mean I should get a 450 lbs/in spring (if I use exact measurements I get something closer to 400lbs/in). That doesn't match the usual recommendation of the list for somebody my weight (245lbs w/ gear), which is to get a 500 lbs or 550 lbs straight-rate spring. Is my logic right? Or is my stock spring possibly stiffer than 300 lbs? I weigh more than you and am using the F1 shock with 400# spring and am happy with it. I do have the preload cranked up a bit. I also used the Progressive 350/450 spring with the stock shock and found it to work pretty well. I personally consider the 500# spring too stiff but others like them. Kurt Grife [Non-text portions of this message have been removed]

pdstreeter@mmm.com

rear spring rate confusion

Post by pdstreeter@mmm.com » Thu Feb 03, 2005 4:15 pm

Dirk wrote:
>1.5 times stiffer than stock. If the stock is 300 lbs/in (according to the >FAQ), that would mean I should get a 450 lbs/in spring (if I use exact >measurements I get something closer to 400lbs/in). >That doesn't match the usual recommendation of the list for somebody >my weight (245lbs w/ gear), which is to get a 500 lbs or 550 lbs >straight-rate spring. Is my logic right?
I'd say: it depends. I weigh about 260. I have a 500 pound spring on the rear of my KLR. It seems a little too stiff around town, but it's just right when I'm loaded down with gear for 2 weeks in Mexico. If I were going to only ride lightly loaded, I think the 450 pounder would be better. Paul Streeter

Pat (M)

rear spring rate confusion

Post by Pat (M) » Thu Feb 03, 2005 9:00 pm

--- In DSN_KLR650@yahoogroups.com, Dirk Beer wrote:
> A question for the suspension experts: > > My stock rear suspension has 1" of static sag, and 4" total sag when I > sit on it. I would like to get a spring that results in 1" static and > 3" total sag with me on it. > > effective spring rate (stock) = x lbs / (4"-1") = x/3 lbs/in > > effective spring rate (desired) = x lbs / (3"-1") = x/2 lbs/in > > where x lbs is the amount of weight my butt adds to the rear. So I > need a spring that is > > x/2 / x/3 = 3/2 = 1.5 > > times stiffer than stock. If the stock is 300 lbs/in (according to the > FAQ), that would mean I should get a 450 lbs/in spring (if I use exact > measurements I get something closer to 400lbs/in). > > That doesn't match the usual recommendation of the list for somebody > my weight (245lbs w/ gear), which is to get a 500 lbs or 550 lbs > straight-rate spring. Is my logic right? Or is my stock spring > possibly stiffer than 300 lbs? > > looking forward to Julian tech day, > > Dirk > A18
= = = = One more data point for you Dirk. I weigh a little less than you but my A14 has a 1.5" lowering link. With that set up I gave away too much spring effectiveness. I used to frequently bottom out when aggressively ridden off road even on the '5' spring setting. The recent change to the 520# progressive spring proved just right for me. I initially set it at the '3' mark and it felt a bit stiff but workable for street riding. It was ALMOST perfect for hard riding off pavement (bottomed out three times in the first 300 dirt miles in some nasty washes in Death Valley). My new compromise that works great: '2' for street and '4' for dirt, no bottom outs and more control. Pat M

Dirk Beer
Posts: 123
Joined: Sat Mar 06, 2004 6:09 am

rear spring rate confusion

Post by Dirk Beer » Fri Feb 04, 2005 10:15 am

Thanks a lot, guys. Sounds like a 450# would be about right... I'll remeasure the sag one more time & then order a spring. I wonder if there's much of a difference between brands? I read in another post that Eibach sells 9"x2.25" springs as well - maybe I'll try those since they are a little cheaper than eshocks. Now I gotta decide on shock oil weight, and the critical question of single- or multi- viscocity fork oil :-) Dirk

Lujo Bauer
Posts: 750
Joined: Wed Jan 23, 2002 5:07 pm

rear spring rate confusion

Post by Lujo Bauer » Fri Feb 04, 2005 10:56 am

Another relevant issue (I apologize if it has already been covered in this thread) is that the super-stiff springs compensate for the less-the-stellar damping of the stock shock, which is one of the reasons for the popularity of the 500-560 spring as the sole upgrade. Still, getting the right weight spring + stiffening the stock shock is the right way to go. -Lujo Dirk Beer wrote:
> Thanks a lot, guys. Sounds like a 450# would be about right... I'll > remeasure the sag one more time & then order a spring. > > I wonder if there's much of a difference between brands? I read in > another post that Eibach sells 9"x2.25" springs as well - maybe I'll > try those since they are a little cheaper than eshocks. > > Now I gotta decide on shock oil weight, and the critical question of > single- or multi- viscocity fork oil :-) > > Dirk > > > Archive Quicksearch at: http://www.angelfire.com/ut/moab/klr650_data_search.html > List sponsored by Dual Sport News at: www.dualsportnews.com > List FAQ courtesy of Chris Krok at: www.bigcee.com/klr650faq.html > > > Yahoo! Groups Links > > > > > > >
-- Lujo Bauer Systems Scientist, CyLab Carnegie Mellon University http://www.ece.cmu.edu/~lbauer/ [Non-text portions of this message have been removed]

dumbazz_650
Posts: 201
Joined: Fri Sep 03, 2004 3:34 pm

rear spring rate confusion

Post by dumbazz_650 » Fri Feb 04, 2005 11:25 am

Helps with the impacts, but then worsens the poor rebound damping issue, after hitting two or three ruts in quick succession, the backend will be bouncing about 3 feet off the ground. Makes it hard to get on the gas with the rear wheel in the air. But overall, the 500-560 spring is an improvement. MarkB
--- In DSN_KLR650@yahoogroups.com, Lujo Bauer wrote: > Another relevant issue (I apologize if it has already been covered in > this thread) is that the super-stiff springs compensate for the > less-the-stellar damping of the stock shock, which is one of the reasons > for the popularity of the 500-560 spring as the sole upgrade. Still, > getting the right weight spring + stiffening the stock shock is the > right way to go. > > -Lujo > > > Dirk Beer wrote: > > Thanks a lot, guys. Sounds like a 450# would be about right... I'll > > remeasure the sag one more time & then order a spring. > > > > I wonder if there's much of a difference between brands? I read in > > another post that Eibach sells 9"x2.25" springs as well - maybe I'll > > try those since they are a little cheaper than eshocks. > > > > Now I gotta decide on shock oil weight, and the critical question of > > single- or multi- viscocity fork oil :-) > > > > Dirk > > > > > > Archive Quicksearch at: http://www.angelfire.com/ut/moab/klr650_data_search.html > > List sponsored by Dual Sport News at: www.dualsportnews.com > > List FAQ courtesy of Chris Krok at: www.bigcee.com/klr650faq.html > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > -- > Lujo Bauer > Systems Scientist, CyLab > Carnegie Mellon University > http://www.ece.cmu.edu/~lbauer/ > > > > [Non-text portions of this message have been removed]

Gary Parece
Posts: 82
Joined: Sun Mar 21, 2004 1:39 pm

rear spring rate confusion

Post by Gary Parece » Fri Feb 04, 2005 11:57 am

Hi, is that the spring size to ask for ( 9"x 2.25) by whatever # you want ???? Gary Parece 98 concours 102K, ,01 KLR650 9K 04 WR250F ,04 H-D Road King
----- Original Message ----- From: "Dirk Beer" To: DSN_KLR650@yahoogroups.com> Sent: Friday, February 04, 2005 11:15 AM Subject: Re: [DSN_KLR650] Re: rear spring rate confusion > > Thanks a lot, guys. Sounds like a 450# would be about right... I'll > remeasure the sag one more time & then order a spring. > > I wonder if there's much of a difference between brands? I read in > another post that Eibach sells 9"x2.25" springs as well - maybe I'll > try those since they are a little cheaper than eshocks. > > Now I gotta decide on shock oil weight, and the critical question of > single- or multi- viscocity fork oil :-) > > Dirk > > > Archive Quicksearch at: > http://www.angelfire.com/ut/moab/klr650_data_search.html > List sponsored by Dual Sport News at: www.dualsportnews.com > List FAQ courtesy of Chris Krok at: www.bigcee.com/klr650faq.html > > > Yahoo! Groups Links > > > > > > > > >

Gary Parece
Posts: 82
Joined: Sun Mar 21, 2004 1:39 pm

rear spring rate confusion

Post by Gary Parece » Fri Feb 04, 2005 12:01 pm

So what your saying is the 500 560 has a lot of rebound????????????? Rebound being the force that pushes the seat back up after it's (the shock) been compressed?????????? Gary Parece 98 concours 102K, ,01 KLR650 9K 04 WR250F ,04 H-D Road King
----- Original Message ----- From: "dumbazz_650" To: DSN_KLR650@yahoogroups.com> Sent: Friday, February 04, 2005 12:24 PM Subject: [DSN_KLR650] Re: rear spring rate confusion > > > Helps with the impacts, but then worsens the poor rebound damping > issue, after hitting two or three ruts in quick succession, the > backend will be bouncing about 3 feet off the ground. Makes it hard > to get on the gas with the rear wheel in the air. But overall, the > 500-560 spring is an improvement. > > MarkB > > > --- In DSN_KLR650@yahoogroups.com, Lujo Bauer wrote: >> Another relevant issue (I apologize if it has already been covered > in >> this thread) is that the super-stiff springs compensate for the >> less-the-stellar damping of the stock shock, which is one of the > reasons >> for the popularity of the 500-560 spring as the sole upgrade. > Still, >> getting the right weight spring + stiffening the stock shock is the >> right way to go. >> >> -Lujo >> >> >> Dirk Beer wrote: >> > Thanks a lot, guys. Sounds like a 450# would be about right... > I'll >> > remeasure the sag one more time & then order a spring. >> > >> > I wonder if there's much of a difference between brands? I read in >> > another post that Eibach sells 9"x2.25" springs as well - maybe > I'll >> > try those since they are a little cheaper than eshocks. >> > >> > Now I gotta decide on shock oil weight, and the critical question > of >> > single- or multi- viscocity fork oil :-) >> > >> > Dirk >> > >> > >> > Archive Quicksearch at: > http://www.angelfire.com/ut/moab/klr650_data_search.html >> > List sponsored by Dual Sport News at: www.dualsportnews.com >> > List FAQ courtesy of Chris Krok at: www.bigcee.com/klr650faq.html >> > >> > >> > Yahoo! Groups Links >> > >> > >> > >> > >> > >> > >> > >> >> -- >> Lujo Bauer >> Systems Scientist, CyLab >> Carnegie Mellon University >> http://www.ece.cmu.edu/~lbauer/ >> >> >> >> [Non-text portions of this message have been removed] > > > > > > Archive Quicksearch at: > http://www.angelfire.com/ut/moab/klr650_data_search.html > List sponsored by Dual Sport News at: www.dualsportnews.com > List FAQ courtesy of Chris Krok at: www.bigcee.com/klr650faq.html > > > Yahoo! Groups Links > > > > > > > > >

Post Reply

Who is online

Users browsing this forum: No registered users and 30 guests