Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > Sport Touring: ST4 / ST3 / ST2 > ST4S Mods

[eskimo]

Originally Posted by YMFB

cant the ventura pack be loaded above the pillion seat rather than behind like the top box.

I run mine on std pressures with panniers, top box and wife and no problems. The only mod we have dione from new is change the rear suspension to Ohlins, IMO worth every penny

Yes the Ventura does rest on the pillion seat behind as l said.
The ST4s does have a ohlins fitted as standard.

Standard tyre pressures, my manual are in bar, l converted it to PSI at 32 f 34 r, is this what do you run yours?

[mc31@york.ac.uk]

Standard tyre pressures, my manual are in bar, l converted it to PSI at 32 f 34 r, ......QUOTE]

Really? what were the bar figures?
I converted my owners manual bar figures and came out with around 38 & 41 (ST2)

My rear has always bled air slowly (no pun intended) so I need to pump it before every ride (still no pun intended). If I go out with less than 36psi at the back, the handling is quite badly affected.

Mike

[John W]

same for me, manual is 2.5 bar and 2.9 bar
2.5 X 14.5 = 36.25psi
2.9 x 14.5 = 42.05psi

I run 38 & 42.

re: the tail pack. I guess that makes a difference if you mount it forward.
Besides, a soft bag on a ventura rack is much less mass than a top box, and less affected by cross winds too
Its personal preference I suppose

[eskimo]

Originally Posted by John W

same for me, manual is 2.5 bar and 2.9 bar
2.5 X 14.5 = 36.25psi
2.9 x 14.5 = 42.05psi

I run 38 & 42.

re: the tail pack. I guess that makes a difference if you mount it forward.
Besides, a soft bag on a ventura rack is much less mass than a top box, and less affected by cross winds too
Its personal preference I suppose

Those Bar pressures you quote in my manual are for: Rider + Passenger+ Luggage it actually says 2.4 front 2.9 rear.

For solo Rider + Luggage it says 2.1 bar F 2.8bar R without checking that's how l got to 32F 34 R

When l was at Snells l did question the tyre pressures, as they had put new tyres on for me, the front must have loss some pressure as it was down to 29 psi the back was 34, as l always run my VFR's at 36 f 42 rear i thought they cocked up, but they said Ducati's run with lower presssures l think they are right, as l feel the front feels skitish with 36 in it the rear well the Jury is out of that one, as l cannot tell much differance between 34 and 42 unless l have a pillion.

[John W]

what tyres are you running ?
I've tried most makes of tyre, and always run 42 rear.

I find anything less than 38 in the front is noticeable as I said.
If the rear is lower than around 38 it too is noticeable even when solo with no luggage. Its most noticeable when getting on the power early out of bends, or in long fast bends where there may be a bump. It feels like the rear rim is rolling in the tyre, funnily enough just like a flat tyre would do
The more you crank the bike over the more it feels likethe rear end sliding away.

By the way, that price for the drop link was a couple of years back now, so it would be a good idea to check first thing monday morning before you make a decision.

To be honest, I will happily ride a bike regardless of compression or rebound settings, but bad tyre pressures I really dislike. If they are wrong, it matters little what you do with the other settings as the bike won't go where you point it.

One final thought: the 4S has the adjustable preload knob, how much of this have you got wound out ?
Either measure the spring length with the bike on the stand, or how much of the adjuster ring is protruding.

[mc31@york.ac.uk]

For solo Rider + Luggage it says 2.1 bar F 2.8bar R without checking that's how l got to 32F 34 R .....(QUOTE)


I'm wondering if the front feels skittish due to the ride height, not the tyre pressure.
By the way, you need to look at your figures again - 2.8 bar equates to 40.611 psi (at sea level just to be pedantic).
Regards,
Mike

[eskimo]

Originally Posted by mc31@york.ac.uk

For solo Rider + Luggage it says 2.1 bar F 2.8bar R without checking that's how l got to 32F 34 R .....(QUOTE)


I'm wondering if the front feels skittish due to the ride height, not the tyre pressure.
By the way, you need to look at your figures again - 2.8 bar equates to 40.611 psi (at sea level just to be pedantic).
Regards,
Mike

Yes l can't wait for my linkage to come back, so l can play with the settings, l assume when l lower the rear wheel this will put more weight on the front wheel, so l will then need to play with the tyre pressures as well

Will let you know how l get on

[John W]

It doesn't affect the weight, it affects the head angle.