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Old 14-06-2021, 03:06 PM   #85
Luddite
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Join Date: Aug 2011
Location: Southampton
Bike: M1100evo
Posts: 2,465
Quote:
Originally Posted by bigredduke View Post
Can of worms duly opened!

Right, with the help of Mrs BRD & daughter I have the following measurements:

R1 = 571mm, R2 = 560mm, so static sag is 11mm
R3 = 530 so sag with rider onboard is 41mm which is 1mm outside of the Ohlins parameters so I conclude that the spring is just over the limit for my bulk. Do you agree?

If I reduce the preload slightly, will the R1 figure increase slightly because the rear wheel will drop or have I got that completely wrong?
Adjusting the preload won't affect the length of the shock at full extension - whether you have zero preload or it's wound fully in, the R1 figure won't change.

That spring sounds just on the soft side of ideal, but it'd be perfectly safe to use on the road. Get it set up at JWR and see how it feels on the road. If you're not constantly bottoming out and it doesn't feel 'wallowy' you shouldn't need a stiffer spring. A lot depends on your riding of course - I favour compliance over bumps as I'm not a particularly aggressive rider but if you're flinging it into bends and powering out on plenty of throttle, you're probably going to want the next stiffness up on the spring (120N/mm).
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