Suspension settings……

[bernardofeio]

Suspension settings……

Hello


The front sag should be measured with the tank full or empty? (I have a 35 L tank)

With half tank I get F1-F2=40mm and F1-F3=50mm (recommended: F1-F2= 30mm and F1-F3=100mm)

How does this will influence the rear settings?

Rear sag is R1-R2=50 and R1-R3=70 (recommended R1-R2=30mm and R1-R3=100mm)

I have a Ohlins with a 80N rear spring and I need to find other softer spring that does’t destroy my spine….




thanks

 

[bernardofeio]

Just correcting the recommended front sag:

(recommended: F1-F2= 30mm and F1-F3=80mm)


Less overall sagging in front if I compare it with the rear

 

[(RIP) maverick]

Mate sorry I can comment on this subject as I know absolutey buggerall about suspension settings. Interesting to read your findings though

 

[PipSqueak]

I wouldn't get too hung up on sag etc on an airhead. If you were setting up a sports bike maybe, but on an airhead which I'm guessing is at least 25 years old just set it middle diddle and fiddle till it feels comfortable.

 

[bernardofeio]

“I wouldn't get too hung up on sag etc on an airhead. If you were setting up a sports bike maybe, but on an airhead which I'm guessing is at least 25 years old just set it middle diddle and fiddle till it feels comfortable.”

That is the big problem!

The bike is destroying my spine because of the very stiff rear suspension. I’m just trying to know if the front springs have a big influence in the rear suspension behaviour.

 

[Kenny]

Maybe the rear spring is for a much heavier guy, if so, nowt you can do about that except send unit off for a rebuild to your weight

Pipsqueak just about sums it up

 

[fayeslane]

What's the recommended front end sag for airhead riders?

 

[Beemerboff]

The rear should have less than the front, around 10 % works for me.

The 80n spring and 17 mm preload is correct for a 75/90 kg rider, base damping 10 clicks out from max.Maximum recommended adjustment on spring is
2mm either way

I am 90 kg , and have the preload at 15 mm, with the damping 8 clicks out. This gives me around 43/45 rider sag.

I have around 48/50 mm rider sag at the front , just where it arrived with the HPN inserts, a bit more rebound and a bit less compression damping then base.

This is just perfect for the bikes intended use. Dont know where you get 100mm/70 mm from. Forget the stuff and nonsense about percentage of travel.

What you are mainly setting is front to rear balance, so it doesnt make a lot of difference if the tank is full or half empty.

 

[bernardofeio]

For a 55 kg chap what should be the spring? 68 N/m, 70N/m,…


BTW: in a BM 836 Ohlins with external preload adjuster how much should be the length difference between full right and full left positions?

 

[BamBam]

“I wouldn't get too hung up on sag etc on an airhead. If you were setting up a sports bike maybe, but on an airhead which I'm guessing is at least 25 years old just set it middle diddle and fiddle till it feels comfortable.”

That is the big problem!

The bike is destroying my spine because of the very stiff rear suspension. I’m just trying to know if the front springs have a big influence in the rear suspension behaviour.

You say the bike is doing your spine, try riding the bike with some weight on the back rack, to supple the ride up.
Subtract the weight added to the bike from your weight and will that give you the comfort you would like?
If it doesn’t help maybe it’s not the shock type for you

 

[(RIP) pastyman]

Get yerself over here and get some proper pie and chips down yer instead of that healthy portugese salady stuff, a lot cheaper than ohlins rebuild and will sort the suspension out a treat

 

[fayeslane]

Get yerself over here and get some proper pie and chips down yer instead of that healthy portugese salady stuff, a lot cheaper than ohlins rebuild and will sort the suspension out a treat

I was under the impression that most airhead riders are fat bastards

 

[Redboots]

BTW: in a BM 836 Ohlins with external preload adjuster how much should be the length difference between full right and full left positions?

Max on the preload adjuster is up to 9mm. Less than that and the adjuster probably needs new seals - part of the overhaul.
You should not need anything like that if the spring and is correct and is preloaded to 15-17mm (Standard).

John

 

[(RIP) maverick]

For a 55 kg chap what should be the spring? 68 N/m, 70N/m,…


BTW: in a BM 836 Ohlins with external preload adjuster how much should be the length difference between full right and full left positions?

55Kg's I last weighed that in primary school

 

[bernardofeio]

"Get yerself over here and get some proper pie and chips down yer instead of that healthy portugese salady stuff, a lot cheaper than ohlins rebuild and will sort the suspension out a treat"

good idea! What a good excuse to travel!
“Dear I have to go for a ride! I need to go heat some pie and chips to get a softer suspension!”


I already bought a 68 N/m spring from Ohlins. The suspestions is now much better.
I’m now trying to adjust the shock. I started with 10 “clics” but it’s to hard. I now testing 18 “clics” and it seem very good.

I will make some measurements and I will let you know.

 

[mikyh]

Bernardo,

I have the same rear shock, and the same "lightness" problem.
The shock was ordered for me by an experienced friend from a bike suspesion specialist in Italy, so I believe he told him my size, as after a little fiddling I have the most comfortable ride imaginable.
As delivered it was a little hard so I went to someone with a press and released the minimum preload by around 3mm and it's now perfect.
I'm around 68Kg, so from your description you have a spring which will not suit you even in 0 preload (not recomended). You have to take th shock to a specialist to exchange the spring for your weight. It dosent have to be an Ohlins specialist - anyone who deals with moto shocks will do (the spring will not be yellow...)
BR, Miky

http://picasaweb.google.com/mikyheimann/MikySBMWGS#5344504094288023490

 

[bernardofeio]

hello

thanks for you comments

what spring do you now have? can you pleasesee the reference in your spring?

bernardo feio

 

[mikyh]

No idea

I'll try to look for a refernce, but it'll take a while.
BR, Miky