Fitting Piston Rings; Piston Rings; Measuring Ring End Gap - Buell XB9R 2003 Service Manual

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Fitting Piston Rings

6612
1
2
1. Top compression ring – Install either side up
2. Second compression ring – Install dot toward top
3. Oil control rings
Figure 3-97. Piston Rings
See Figure 3-97. Piston rings are of two types: compression
and oil control. The two compression rings are positioned in
the two upper piston ring grooves. The dot on the second
compression ring must face upward. Ring sets are available
to fit standard and oversize pistons.
3
Dot
Figure 3-98. Measuring Ring End Gap
Piston ring sets must be properly fitted to piston and cylinder:
1. See Figure 3-98. Insert the new ring into the cylinder,
square it in the bore using the top of the piston and mea-
sure the ring end gap with a feeler gauge. Do not use the
ring if the end gap does not fall within the following spec-
ifications, See Table 3-24.
Table 3-24. Piston Ring End Gap
Ring Type
Top compression ring
2nd compression ring
Oil control ring rails
2003 Buell XB9R: Engine
2783b
Ring End Gap
inches mm
0.010 - 0.020 0.25 - 0.51
0.014 - 0.024 0.36 - 0.61
0.010 - 0.050 0.25 - 1.27
3-67