O.k. so you know the travails of EFI.
The valve train is a shim over bucket, like a Triumph triple or older DOHC Jap bike, so the shims are subject to wear and why swapping may not be popular with dealers, correct?
I'm not sure what a shim over bucket is... It's a desmo valve train so there are two shims per valve, opener and closer and proper clearances are pretty critical. The opener might be called a "bucket" and the closer looks like a "hat" with a hole through it. I think the change in clearance over time is more from the valve pounding into the seat. Actually I don't think the shims wear all that much and worn ones can be used where one needs a thinner shim. It's pretty common practice to sand shims to achieve proper clearances. I think the swapping "issue" would be more due to it's a PIA kind of situation for dealers. We're lucky to have two VERY good Ducati Techs here in Minneapolis at Silverback Performance. They swap shims for a fee. (15 bucks per IIRC) I take in my shims with measured clearances and they measure them and swap them out for shims of proper thickness. You could measure and do the math yourself and chance ordering online but... the measurements don't always work out exactly so it would b a real pain to have to do this via online sales. A shim kit is really the way to go. It doesn't take long to make up the cost of the shim kit if it's going to cost you roughly 40 bucks for exchange.
Do dealers in general stock a selection of shims and sell individual parts willingly?
I guess I can't answer that one from FHE. I think so. I am spoiled by having Silverback Performance local. I know of Ducs (and Harleys) from all over, Chicago, Winnipeg, California etc. to have them tuned by Doug Lofgren or Fred Snyder.
Are there on-line sources/dealers?
Yes there are some excellent online dealers, both oem and aftermarket.
Many of them are sponsors at Ducatimonster.org.
Ducati Seattle, BCM in New Hampshire, AMS in Texas all get excellent reviews for oem parts. I suspect Hall's Cycles in Illinois would be excellent oem source too. I haven't ordered Duc parts from them but they had IN STOCK just about everything I needed to revive that old '91 Husky 610wxe and it needed some obscure stuff.
I haven't looked closely at or ridden a Shiver, but it looks like it's sporting some excellent components. Can't say I like the trends in styling... even the new 696 Monster is going that way... Sharp pointy angular... I must be getting old...
I was away from bikes for 20+ years and I picked the Monster for totally impractical reasons... it looked like a motorcycle and not some kind of 2 wheeled space ship, I've "always wanted" a Duc, it was comfortable, air cooled, fairly simple. I was just going to "putt" around on it anway...
like a responsible adult...
Probably a more sensible choice for me.
Huh... that would probably be the reason I would end up wit the Duc. Have you ridden them both? That desmo drone is intoxicating...