Suspension, tire pressures, what worked well for me

[Biker Biggles]

I recall some 90s Ducatis had rebound damping in one leg and compression in the other.Sounds like a good idea,but no one does it now do they?

The idea of using 20W oil in one fork and 30W oil in the other is apparently utilized by TRAXXION, see: http://forums.13x.com/showthread.php...+30w+oil+forks

Originally Posted by pilot

The idea of using 20W oil in one fork and 30W oil in the other is apparently utilized by TRAXXION, see: http://forums.13x.com/showthread.php...+30w+oil+forks

I can see the logic of using diff springs in each leg (and hence diff oils/damping), but with the same springs, the only logic that you don’t have to make a ‘home brew’ of the oil … bearing in mind the torsion issues you might get, that can’t be the only reason/reason enough surely?

[northwind]

If it was me, I'd mix the oil. But that's not to say it's a bad idea to do the 2 leg thing. The bike does have a fork brace, it's called the axle

Originally Posted by Biker Biggles

I recall some 90s Ducatis had rebound damping in one leg and compression in the other.Sounds like a good idea,but no one does it now do they?

I didn't know that Ducati were doing that, but mountain manufacturers have been up to that trick for a long time now with their forks, particularly on the higher end bikes.
Its more or less the standard way of doing it for some fork guys I think, so I would bet that some trials bikes would run that set up today.

Originally Posted by philipMac

I didn't know that Ducati were doing that, but mountain manufacturers have been up to that trick for a long time now with their forks, particularly on the higher end bikes.
Its more or less the standard way of doing it for some fork guys I think, so I would bet that some trials bikes would run that set up today.

The new Triumph Speed Triple has comp and rebound in each leg...............And they're absolutely cr*p

Aprillia RS125's have been like this for years too.

One thing to bear in mind is the ambient temperature in the US is higher hence the heavier weight oil's, they do up to 50wt!! but anything over a 25 in our damp cold isle is not needed

[21QUEST]

Myself, I'd prefer same viscosity in each leg........just because (if nothing else)my brain would prefer symmetry. I know I'll probably keep thinking about it

It's quicker to play around with changing the viscosity if need be, is one reason that I've read mentioned somewhere ie only needing to change oil in one leg to arrive at new Viscosity.

I think some Ohlins replacement catridge where set up with compression in one leg and rebound in the other ......IIRC early GSXR600 SRAD.

Also think think the first Kawasaki Z1000 also had an some sort of oddish(is that a word?) setup....compression in one leg and rebound in the other or springs in one leg and damping in the other. One of the above anyways I believe.

It could indeed actually be so they could isolate/control the compression damping/rebound damping of the SV damping Rod forks a bit better.
On the other hand, it may just be a Tuner making "snake oil" like moves on folks..... haha



Ben

I wrote TRAXXION directly about using differant fork weight oil in each fork. Their senior technician indicated:

"This does not affect the forks and it simplifies the tuning - if you want
to change the damping just leave the 20W fork alone and change the oil in
the right (30W) fork only. Use Maxima fork oil 10W-30W depending on conditions (temperature) and desired amount of rebound damping. 110-120mm oil level."

There you have it, directly from a company that many would say is one of the top suspension firms in the world.

Originally Posted by pilot

I wrote TRAXXION directly about using differant fork weight oil in each fork. Their senior technician indicated:

"This does not affect the forks and it simplifies the tuning - if you want
to change the damping just leave the 20W fork alone and change the oil in
the right (30W) fork only. Use Maxima fork oil 10W-30W depending on conditions (temperature) and desired amount of rebound damping. 110-120mm oil level."

There you have it, directly from a company that many would say is one of the top suspension firms in the world.

Aha, yep that makes logical sense ... you then only have to take one fork apart to change the damping rather than both ... quite sensible actually!!

[northwind]

Of course, if you have the same oil in both you can still change just one