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Author Topic: Chain adjustment on single sided swingarms  (Read 4968 times)
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blue tiger
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« on: May 30, 2008, 02:52:36 PM »

First a little about me and my bike. I am not afraid to wrench on things a little but I like to be well informed. I once took an old harley down to the frame, rebuilt the motor and rode it for another 2 years brfore parting it. Not bad for a shade tree mechanic.

I now own a 08 tricolore (s4rs) which has a single sided swingarm. The first question is easy. How often do they typically need adjustment. How is it performed. I've read plenty of articles about it but they all pertain to a regular swingarm. I want specific instructions on how it is done for my bike. If it only needs done every 6000 miles (really doubtful as this aint my first chain drive bike!) I'd have the shop do it. As it stands I need to be doing this basic stuff myself , unles that is it's not near as basic as it seems.

Any links or straight up instructions would be great. Links to where an actual shop manual can be found would be nice as well.

Ciao my brothers
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BryanS
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« Reply #1 on: May 30, 2008, 03:25:08 PM »

There are some members with single sided swingarms that I'm sure will chime in with experience. Since they haven't responded yet I'll toss in my 2 cents Smiley

You need a chain adjuster tool. Its a bit like the wrench you use to adjust preload on a shock. You loosen a couple of bolts that hold an eccentric in place. The axle passes through that so as you rotate the eccentric with the tool it moves the wheel closer to or further from the front of the bike, thus tensioning the chain.

Corsair Industries sells the tool, which they make, and they offer us 10% off - see the sponsor forum for a coupon code.

I tension the chain on my dss bike as needed. Once I've got a few miles on the chain it doesn't seem much adjusting. I just lift the bottom of the chain, near the middle of its length, with the toe of my boot every few rides and check the slack that way. My owners manual called for 1" of deflection (actually it was metric but came out to about 1"). So I measure it with a ruler when I set it but eyeball it just to check up on it occasionally.
« Last Edit: May 30, 2008, 10:35:38 PM by BryanS » Logged

blue tiger
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« Reply #2 on: May 30, 2008, 03:40:42 PM »

Thanks Bryan!! More,more,more advice please!!!
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DucLeone
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« Reply #3 on: May 30, 2008, 04:08:22 PM »

pretty much like bryan said
loose the eccentric and rotate it to the desired tension
i used a Plummer wrench from lowes, its pretty much the same thing

(if your sticker is still on the swingarm it will tell you hou much slack you need)
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blue tiger
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« Reply #4 on: May 30, 2008, 04:50:23 PM »

I may be pretty eccentric but that doesn't mean I could find it on my bike. Seriously, will it stand out as easy to identify. Is it on the open side of the swingarm or the sprocket side. I researched Monsters for a solid year before buying one but I only researched how badass they are not how to service them. Thanks for the first replies and any more help!!
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DucLeone
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« Reply #5 on: May 30, 2008, 04:55:28 PM »

behind the sprocket you will see two bolts they hold the eccentric
the eccentric it self yoou will be adjusting it right behind the sprocket
(YOU should see notches all around the eccentric its about 1/8" thick)
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Hedgehog
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« Reply #6 on: May 30, 2008, 05:29:52 PM »

Watch this video.  It's not the same bike, but the adjustment is essentially the same for all single-sided swingarm bikes.

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BryanS
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« Reply #7 on: May 30, 2008, 05:55:52 PM »

An eccentric is basically a sleeve in the swing arm that the axle passes through. Its hole for the axle is off center so as you rotate that sleeve the off center hole goes closer to the front and up and away from the front and down as you turn it. Adjusting the chain makes slight changes in the ride height due to this effect
« Last Edit: May 30, 2008, 10:35:00 PM by BryanS » Logged

blue tiger
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« Reply #8 on: May 30, 2008, 09:58:25 PM »

You guys are awesome!! I will take a nice close look when I get home this morning. I get off at 0400.
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BryanS
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« Reply #9 on: June 02, 2008, 05:55:57 PM »

here's the tool you use....

http://www.monsterparts.com/pc/CI-SWINGARM/Maintenance/CI-SWINGARM.html

http://corsair-industries.com/parts/Ducati%20Tools/Ducati%20Chain%20Eccentric%20Adjusting%20Tool/


It looks like both Monster Parts and Corsair Industries sell this part, which Corsair makes.  Both have the same price and the same discount.  Both are great to buy from and are club sponsors.
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FreeDuc
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« Reply #10 on: June 05, 2008, 04:43:41 PM »

Looks like a typical spanner wrench, eh?
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MotoPsycho
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« Reply #11 on: June 05, 2008, 05:46:25 PM »

I winder if it's the same one that you adjust the preload on the shock with.
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« Reply #12 on: June 05, 2008, 05:48:39 PM »

I think it's a bit different - different radius to the curve of it.  Check out corsair's website for the wrench for the shock
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FreeDuc
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« Reply #13 on: June 05, 2008, 05:52:32 PM »

We have them at work that have a pivot in the middle so that they work on different radii.

At least I think that's why they pivot.
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MotoPsycho
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« Reply #14 on: June 06, 2008, 04:14:23 AM »

Yes Rob, that's why they pivot. And possible to provide an opportunity to reach a tighter spase also. We have one for our centrifuge at work that has 2 sizes, 1 at each end and they both pivot.
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