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xs650 > > Motorcycle Systems > > Frames > > spring rates |
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TheDude Full Member
Joined: Feb 15, 2008 Posts: 152 Location: Arcata, CA
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Posted: May 13, 2008, 3:47 pm Post subject: spring rates |
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OK, so I'm trying to decide on springs for the front to match my Hammerheads on the rear.
650 central offers two different progressives springs: 25/35 lb and 35/50 lb.
Doas anyone know the spring rate for the mikesxs springs?
How about the rate for the stock springs?
Thanks
_________________ '78 XS650E Standard |
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royfisk Full Member
Joined: May 24, 2006 Posts: 1597 Location: winchester, new hampshire usa
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Posted: May 13, 2008, 4:59 pm Post subject: Re: spring rates |
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dude what you weigh? Over 180 go with the heavier spring.
_________________ build them , ride them, tear them down, rebuild them, ride them, etc. etc. etc.. They only get better and better |
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TheDude Full Member
Joined: Feb 15, 2008 Posts: 152 Location: Arcata, CA
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Posted: May 13, 2008, 8:50 pm Post subject: Re: spring rates |
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I weigh 185. I'm inclined to go w/ the heavier, but Mike at 650 central warns against the front end being raised too high (not enough sag). I'm wondering if I can get away with lowering the front end by raising the tubes in the triple clamps.
_________________ '78 XS650E Standard |
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royfisk Full Member
Joined: May 24, 2006 Posts: 1597 Location: winchester, new hampshire usa
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Posted: May 13, 2008, 9:40 pm Post subject: Re: spring rates |
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absolutely, that means if it raises that your finally getting all of the travel the forks have to offer.
_________________ build them , ride them, tear them down, rebuild them, ride them, etc. etc. etc.. They only get better and better |
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xsjohn Full Member
Joined: Jul 30, 2006 Posts: 5857 Location: North Carolina USSA
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Posted: May 13, 2008, 9:40 pm Post subject: Re: spring rates |
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Would think that the fork tubes riding too high in the lower legs could make them more wobblyand more tendancy to top....a piece of handlebar stock under the cap as a spacer is cheap enough.....inch or so....xsjohn
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royfisk Full Member
Joined: May 24, 2006 Posts: 1597 Location: winchester, new hampshire usa
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Posted: May 13, 2008, 9:51 pm Post subject: Re: spring rates |
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no john hes actually dropping the trees roughly a 1/2 inch. So they will be 1/2 inch above the top triple clamp.
_________________ build them , ride them, tear them down, rebuild them, ride them, etc. etc. etc.. They only get better and better |
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xsjohn Full Member
Joined: Jul 30, 2006 Posts: 5857 Location: North Carolina USSA
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Posted: May 13, 2008, 9:56 pm Post subject: Re: spring rates |
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Understand......so he can increase the preload......spacers increace the preload also.....xsjohn
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royfisk Full Member
Joined: May 24, 2006 Posts: 1597 Location: winchester, new hampshire usa
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Posted: May 14, 2008, 7:55 am Post subject: Re: spring rates |
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No John he is increasing spring rate not preload. Yes you can add spacers that compresses your springs, this also causes coil bind and your springs to bottom prematurely. Results are shortening you leg travel. This technique was used allot in the 70's. But is not the cure for suspension performance tunning. It does help on non performance bikes trying to load the springs a little to take up the sag. This application in question is a cafe type bike looking for handling characteristics. Emulators and springs are what is going to get the job done.
_________________ build them , ride them, tear them down, rebuild them, ride them, etc. etc. etc.. They only get better and better |
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xsleo Full Member
Joined: Oct 28, 2007 Posts: 1528 Location: Earlville NY
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Posted: May 14, 2008, 12:54 pm Post subject: Re: spring rates |
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i was readind some where that if you use the emulators ,you should run a straight rate spring, not a progressive. will it matter?
_________________ "You live more in five minutes on a bike than most people do in there whole life"
'75 XS650B with a 79 dual disc front end, rear disk brake, Chrysler reg, Radio Shack rect, LED tail/ brake and turn signals. |
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royfisk Full Member
Joined: May 24, 2006 Posts: 1597 Location: winchester, new hampshire usa
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Posted: May 14, 2008, 10:42 pm Post subject: Re: spring rates |
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Well according to race tech they want you to use progressive springs. I went through there tech line when i retro fit a xs-850 fork to my xsl project. There was no emulator listed anywhere for it so I called them. And got a part " and they suggested I use the springs. I didn't use either, the fork is sprung heavier then the 650 fork from the get go and the tubes are 36mm. they work sweet.
_________________ build them , ride them, tear them down, rebuild them, ride them, etc. etc. etc.. They only get better and better |
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