Wilsons Sandbox

> 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

>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?

> 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

> 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 > > > > > > >

--- 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]

----- 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 > > > > > > > > >

----- 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 > > > > > > > > >