On the speedometer side of the 998 wheel, there is a raised lip that centers the spacer and sits proud enough to center the disc as well. On the right side, there is no lip, the hub is actually beveled. This means the spacer is centered on the wheel hub but the disc is centered only by the bolts. This is far from ideal. It’s not worth losing sleep over, but it is a bummer and ensures that when I replace these discs, I’ll get proper offset 748R-998R ones to eliminate this potential problem. The new disc bolts also have a slightly taller head than the OEM ones. They appear to fit without issue, and all the aftermarket Allen key bolts have heads this height. Not sure why Ducati would use a nonstandard size.
When I bought this engine it had an EVR 48 tooth clutch installed but only a stock clutch drum and pressure plate. A used Bucci slipper clutch was found online and installed in the ‘race’ orientation. A slipper clutch decouples the rear wheel and gearbox to allow them to rotate at different speeds. This prevents the rear wheel from locking up and skidding under fast deceleration and quick downshifting. Slipper clutches are hugely beneficial for race track use, especially on a high compression engine with two big pistons.
Brake reservoir hose that is fifteen years old is junk, replace all of it. Everyone that sells this stuff online sells 12” sections at a time. This really is all that’s needed for just the brake master cylinder, but for $7 per foot, you can find better. McMaster-Carr also carried this, but for less than $2 per ft. I ordered 5ft of length. It’s really imperative to get the proper type of hose, otherwise, the hose could ‘sweat’ brake fluid through it. The pictured hose is what you’re looking for. Keep in mind if you buy it from amazon, it comes in 12” sections, even if you order 5ft. This tubing isn’t really advised on street bikes because UV rays break down brake fluid over time and degrade it. This is why OEM hose is black. Being that this bike will he race track only, it’s not a concern.