Installing new drive belt on my Low Rider Custom. Repacked the wheel bearings- front laced wheel and cast rear wheel. I found both the spacer sleeves that the axles go through to be the same front and rear-that is they both look like pieces of machined steel tubing. Yet the service manual for 1993 and 1994 FXR/FLT Models on page 2-17 shows a sleeve for a cast FXR rear wheel that differs from the part number shown on page 89 of the parts manual. Is this difference in parts and part numbers a typo?