Name: Buell 2007 LIGHTNING
Brand: Buell
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2007 Buell Lightning: Engine 3-65

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Fitting Piston Rings

NOTE

See Figure 3-91. 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.

1. See Figure 3-92. 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 3-23.

NOTES

● The same piston may be used if cylinder bore was not

changed, unless it is scuffed or grooved. If re-using pis-

ton, replace piston rings and hone the cylinder walls with

a No. 240 grit ﬂexible hone to facilitate ring seating.

● Piston ring sets must be properly ﬁtted to piston and cyl-

inder.

Figure 3-91. Piston Rings

1. Top compression ring – Install either side up

2. Second compression ring – Install dot toward top

3. Oil control rings

6612

Dot

Figure 3-92. Measuring Ring End Gap

Table 3-23. Piston Ring End Gap

Ring Type in. mm

Top compression ring 0.010-0.020 0.25-0.51

2nd compression ring 0.014-0.024 0.36-0.61

Oil control ring rails 0.010-0.050 0.25-1.27

2783b

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Buell 2007 LIGHTNING Specifications

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