Buell 2003XB9S Service Manual page 271

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NOTE
The same piston may be used if cylinder bore was not
changed, unless it is scuffed or grooved. If re-using piston,
replace piston rings and hone the cylinder walls with a No.
240 grit flexible hone to facilitate ring seating.
8638
Figure 3-99. Installing Piston Rings Transmission Shaft
Retaining Ring Pliers (Part No. J-5586)
9. See Figure 3-99. Apply engine oil to piston grooves. Use
TRANSMISSION SHAFT RETAINING RING PLIERS
(Part No. J-5586) to slip compression rings over piston
into their respective grooves. Be extremely careful not to
over expand, twist rings or damage piston surface when
installing rings.
NOTE
Install second compression ring with dot towards top.
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Position ring end gaps at arrows
Front
Piston
Pin
Rear
Figure 3-100. Ring End Gap Position
10. See Figure 3-100. Install rings so end gaps of adjacent
rings are a minimum of 90° apart. Ring gaps are not to
be within 10° of the thrust face centerline.
3-68 2003 Buell XB9S: Engine
8637
Figure 3-101. Measuring Ring Clearance in Groove
11. See Figure 3-101. Check for proper side clearance with
thickness gauge, as shown. See
NOTE
If the ring grooves are clean and the side play is still not cor-
rect, replace the rings, the piston or both.
3.1 SPECIFICATIONS.