I just did mine.
All the exhaust shims were 290 (2.90mm) - I ended up swapping out for 285's.
The intakes were all in the 270's: odd stuff, too, like 273, 278. Swapped out for 265's and 270's, maybe a 275 in there, too.
After some confusion between parts and service, my local dealer realized they DO swap them. The service guys didn't know what I was talking about, the parts guy whipped out a huge box of shims which seemed to range from about 250 up to 300-something.
Interestingly, all the little compartments in the shim box had a few shims in them, but the "275" compartment was stuffed full. He threw my 273 and 278 in there, too, suggesting that Suzuki thinks 270-280 is the sweet spot.