What does this refer to? Is this the same as synchronizing the cylinders? I was reading the Workshop manual for my bike (07 S4Rs) and got to the Cylinder synchronization section.
The manual states that the bike should be plugged into the Ducati Diagnostic System, which I presume is the dealer version of the VDST Software? Yes? No?
The manual is being dirty:
http://onlineslangdictionary.com/definition+of/trim (http://onlineslangdictionary.com/definition+of/trim)
It's setting a small adjustment to the injector pulse width.
It richens or leans out the mixture a small amount, most effective at setting idle and near-idle mixture.
Quote from: sroberts152 on November 10, 2009, 12:16:56 PM
The manual is being dirty:
http://onlineslangdictionary.com/definition+of/trim (http://onlineslangdictionary.com/definition+of/trim)
Nice one!
Quote from: Speeddog on November 10, 2009, 12:34:44 PM
It's setting a small adjustment to the injector pulse width.
It richens or leans out the mixture a small amount, most effective at setting idle and near-idle mixture.
Is this done via the air-fuel mixture screws found on the sides of the cylinders?
No, setting the trim is done electronically via the Mathesis or VDST.
You can sort of adjust the idle mixture with the air bleed screws on the throttle bodies, but usually those are adjusted to set the idle speed.
Quote from: Speeddog on November 10, 2009, 01:26:57 PM
No, setting the trim is done electronically via the Mathesis or VDST.
You can sort of adjust the idle mixture with the air bleed screws on the throttle bodies, but usually those are adjusted to set the idle speed.
The manual says "Idle speed is automatically controlled by the stepper motor and thus requires no adjustment." This from the workshop manual:
Monster S4RS - M.Y. 2006 - edizione/edition 00
So it sounds like playing around with those screws will do nothing for my bike while it's running...or will it?
My bad. :P
Yeah, you've got the idle stepper controlling the air bleed.
If you're running closed-loop, tweaking the air bleeds won't help.
Quote from: Speeddog on November 10, 2009, 01:53:55 PM
My bad. :P
Yeah, you've got the idle stepper controlling the air bleed.
If you're running closed-loop, tweaking the air bleeds won't help.
Thanks! I've been trying to cure this surge/dead spot in 3rd gear around 6K rmp and I've had no luck. Bike is bone stock in the exhaust dept...tried the fat duc...not much help. I posted about this issue a while back and back then the symptoms pointed to my clutch slipping (which I haven't ruled out) but it only seems to happen in 3rd gear so I'm not sure if when the clutch slips, it slips for all gears or just some.
[bang]
IMO, trim isn't going to help you there.
If the clutch is slipping, it'll do it in every gear.
Get it pulling hard in say 5th gear at 5k rpm, give the clutch a quick snap, see if it grabs tight again.
Thanks for the info - I was afraid you would say that.
Back to the old drawing board....