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superduke forum • View topic - Setting Rear Preload on 2008 SD990 ??

Setting Rear Preload on 2008 SD990 ??

problems . solutions . product reviews . tips
johnwiz
Minimoto racer
 
Posts: 7
Joined: Mon Jan 04, 2016 8:15 pm

Setting Rear Preload on 2008 SD990 ??

Postby johnwiz » Tue Aug 04, 2020 6:38 pm

I see in my owners handbook 6mm of preload is recommended. Is it simply a case of loosening the pinch bolt on the adjusting collar & rotating until I have the 6 mm spacing between the adjusting collar & the top collar ? Cheers , John

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galobos
Minimoto racer
 
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Joined: Wed Sep 12, 2012 8:26 pm
Location: Three Rivers, California

Re: Setting Rear Preload on 2008 SD990 ??

Postby galobos » Fri Aug 28, 2020 6:34 pm

That's how you set it, but you really need to set front & rear preload sag based on rider weight, not any "set" number.
'07 Super Duke
'08 BMW K1200GT
Shouldn't have let go....
2002 Aprilia RST Futura
1977 Ducati 900 SS
1972 Norton Comando
1971 Ducati 750GT

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bic_bicknell
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Re: Setting Rear Preload on 2008 SD990 ??

Postby bic_bicknell » Fri Aug 28, 2020 7:56 pm

All my pre-loads were done at a track day and the technician always got me to sit on the bike (fully kitted up ) and measure the static sag first. Not easy to do on your own but worth the time and trouble to get it right.
Past: Honda CB125J, Honda TL125, 1963 Triumph Tiger 90, Yamaha RD250, Kawasaki KH250, Kawasaki 400 S3, Kawasaki KH400, Kawasaki Z400J, Suzuki GS750, Suzuki GS1000, Ducati SS900 Superlight, KTM LC4 Supermoto, Honda VFR 800i, KTM Superduke '07.

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galobos
Minimoto racer
 
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Joined: Wed Sep 12, 2012 8:26 pm
Location: Three Rivers, California

Re: Setting Rear Preload on 2008 SD990 ??

Postby galobos » Sat Aug 29, 2020 3:10 am

You can do it on your own with a front chock and . Handy gadget that can be shared easily. For a detailed video:
'07 Super Duke
'08 BMW K1200GT
Shouldn't have let go....
2002 Aprilia RST Futura
1977 Ducati 900 SS
1972 Norton Comando
1971 Ducati 750GT

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nampus
Stunt rider
 
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Joined: Thu Nov 04, 2010 4:24 pm
Location: The Netherlands

Re: Setting Rear Preload on 2008 SD990 ??

Postby nampus » Fri Sep 04, 2020 2:37 pm

The 6mm preload is the amount the spring is compressed.
If it's a standard spring it should be 185mm long when not compressed.
So if you add 6mm of preload, the length of the spring should be 179mm.
So you need the measure the length of the spring, not the distance between the collars.


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