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struan80 |
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 struan80 World Chat Champion

Joined: 04 Nov 2014 Karma :   
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stinkwheel |
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 stinkwheel Bovine Proctologist

Joined: 12 Jul 2004 Karma :    
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 Posted: 06:39 - 03 Apr 2025 Post subject: |
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No, adjusting the damping alters the speed the suspension changes position, not the position itself.
Altering the preload will adjust loaded ride height but also alters sag.
Changing suspension settings to alter ride height is probably a bad idea, it will affect handling because they are all settings to keep the wheel on the road.
Rear ride height adjustment is best done by either fitting a different length shock or different tie bars if it's a monoshock.
If you drop the rear alone, you will also alter the rake angle which will slow down steering and if taken to an extreme, can make the steering "flop" to either side when corrnering. You would ideally also alter front ride heigh the same amount, usually by dropping the forks through the yokes. This keeps the rake angle the same but can come at a cost of reducing ground clearance and clearance between the wheel and the front of the bike. So there is a point of diminishing returns. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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struan80 |
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 struan80 World Chat Champion

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stinkwheel |
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 stinkwheel Bovine Proctologist

Joined: 12 Jul 2004 Karma :    
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 Posted: 16:51 - 03 Apr 2025 Post subject: |
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struan80 wrote: |
Thanks good explanation. I don't want to mess with the geometry. I may get my suspension set up correctly by a specialist, based on my weight.
I'm thinking you need three people. Me on the bike someone else holding the bike and someone measuring the sag.  |
Or a cable tie round the fork tube.
That said, if you've calculated the correct spring rate based on the bike and rider weight then set the static sag, the rider sag should be in the correct ballaprk.
I use the calculator tool on https://racetech.com/
If I was pissing with ride height, in an ideal world, I'd check the rake angle with one of those angle finder tools before I started, set the rear ride height then adjust the rake angle back to where it was by sliding the forks through the yokes.
Lowering it will shorten the wheelbase slightly too so if it feels too exciteable on corners, you might want to rake it back out a touch. More likely to be an actual issue on a very sports orientated bike which is pushing the rake angle as it is. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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Polarbear |
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 Polarbear Super Spammer

Joined: 24 Feb 2007 Karma :  
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