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Buell Motorcycle Forum » THUMPer Forum » Buell Blast Thumper Knowledge Vault » Suspension Mods » Archive through January 18, 2008 « Previous Next »

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Krid80
Posted on Saturday, August 11, 2007 - 12:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

the 1990's seca 2 was a 600. also, that shock is an awesome upgrade and on the second preload has such an increase that I thought I was dropping it when I put it on the sidestand.
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Krid80
Posted on Saturday, August 11, 2007 - 12:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

oh... and the 919 is a honda that ralph used a shock from. it was so high he said it made the bike handle awkward
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Ezblast
Posted on Saturday, August 11, 2007 - 01:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The shim stiffens but does not raise - I've a 1/2" in the rear of the red shock - and it helps handling.
GT - JBOTDS! EZ
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Gearheaderiko
Posted on Saturday, August 11, 2007 - 09:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It does raise although it is limited by the full extension of the shock.

Example: Without any preload adjustment shim and sitting on the bike, the rear compresses 2". Now add 1/4" spacer which adds about 1". Now since youve got more preload the rear will not compress 2" but now only 1". You have now raised the rear height by 1". Take it to the extreme and install a sleeve instead of the rear spring and you'll have no rear shock compression. You've now raised the ride height by 2"!

To be put another way adding shims changes travel. It does not change the full travel. If the bike with a rider compresses 2", you then have 2" the shock (measured at the axle) will compress and 2" the shock will extend. Add the 1/4" shim (=1") you now have 3" that shock will compress and only 1" the shock will extend (changing ride height by 1").

The dimensions given are example only. Actual measurements will vary depending on rider weight and seating position.

Again it should be noted that stiffening (or raising with non stock length shocks) and not paying any attention the front forks can lead to a very poor handling bike. Death or serious injury can result!
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Ezblast
Posted on Saturday, August 11, 2007 - 12:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Merci'
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Sking1973
Posted on Saturday, August 11, 2007 - 08:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks for all the info. I really need to get a little more clearance in some way. I'm not looking into this not some much for rider comfort, but on the rough roads of SE Ohio I've actually bottomed out a couple of times with the larger Jardine exhaust underneath. I was looking at the stock shock and without a rider there is approx. an inch of travel. Is that normal?
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Gearheaderiko
Posted on Saturday, August 11, 2007 - 09:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

1 inch of travel at the actual shock is normal. 1" = 4" at the rear axle.
Your best bet is a 1/4" shim under the spring of the rear shock and a 1" spacer in the front forks. A good place to start anyway!
Both are simple to do. The front forks are a little more complicated but can be done with simple tools. The rear is much easier, but complicated by finding an appropriate shock disassembly tool (dont bother with Progressive Suspension tools-they wont work).
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Bonesdl1
Posted on Friday, January 18, 2008 - 08:36 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What are the benefits of adding a fork brace to the Blast?
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Ezblast
Posted on Friday, January 18, 2008 - 11:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Two fold - equalizes torsional forces on the forks - giving less input to forces acting on only one side of the tire/fork, makes the forks stiffer for better handling, and if your adding SS Braided break line - equalizes the breaking forces as well.
EZ
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Buellistic
Posted on Friday, January 18, 2008 - 11:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

in car talk,torque(pull) to the right !!!
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Ezblast
Posted on Friday, January 18, 2008 - 12:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Correct!
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Bonesdl1
Posted on Friday, January 18, 2008 - 10:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

When mounting a fork brace, where on the forks would be the optimal location?
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Gearheaderiko
Posted on Friday, January 18, 2008 - 11:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

At the top of the sliders just above the fender.
Awesome would be bolted to the fender mounting holes!
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