Buell XB 2010, Service Manual

Page: 321 / 714

1. Soak cylinder and piston in an aluminum-compatible
cleaner/solvent until deposits are soft, then clean with a
brush. Blow off loosened carbon and dirt particles and
wash in solvent.
2. Clean oil passage in cylinder with compressed air.
3. Clean piston ring grooves with a piece of compression
ring ground to a chisel shape.
4. Examine piston pin to see that it is not pitted or scored.
5. Check piston pin bushing to see that it is not loose in
connecting rod, grooved, pitted or scored.
a. A piston pin properly fitted to upper connecting rod
bushing has a 0.00125-0.00175 in. (0.03175-0.04445
mm) clearance in bushing.
b. See 3.8 CYLINDER AND PISTON, Connecting Rod
Bushing . If piston pin-to-bushing clearance exceeds
0.00200 in. (0.05080 mm), replace worn parts.
6. Clean piston pin retaining ring grooves.
7. Examine piston and cylinder for cracks, burned spots,
grooves and gouges.
8. Check connecting rod for up and down play in lower
bearings. When up and down play is detected, lower
bearing should be refitted. This requires removing and
disassembling engine crankcase.
Checking Gasket Surface
NOTE
If cylinder gasket surface does not meet flatness specifications,
replace cylinder and piston. Proper tolerances will extend
component life and prevent leaks.
sm00159
Figure 3-74. Checking Gasket Surface
1. See Figure 3-74 . Check cylinder head gasket surface for
flatness.
a. Lay a straightedge across the surface.
b. Try to insert a feeler gauge between the straightedge
and the gasket surface.
c. If cylinder head gasket surface is not flat within 0.006
in. (0.152 mm), replace cylinder and piston.
2. Check cylinder base gasket surface for flatness.
a. Lay a straightedge across the surface.
b. Try to insert a feeler gauge between the straightedge
and the gasket surface.
c. If cylinder base gasket surface is not flat within 0.008
in. (0.203 mm), replace cylinder and piston.
Measuring Cylinder Bore
1. Remove any burrs from the cylinder gasket surfaces.
2. See Figure 3-75 . Install a head gasket, base gasket, and
CYLINDER TORQUEPLATES (Part No. HD-33446B) and
XL EVOLUTION TORQUE PLATE BOLTS (Part No. HD-
33446-86). Tighten the bolts using the same method used
when installing the cylinder head screws. See
3.2 SPE-
CIFICATIONS .
NOTE
Torque plates, properly tightened and installed with gaskets,
simulate engine operating conditions. Measurements will vary
as much as 0.001 in. (0.025 mm) without torque plates.
3. See Figure 3-75 . Take cylinder bore measurement in ring
path, starting about 0.50 in. (12.7 mm) from top of cylinder,
measuring from front to rear and then side to side. Record
readings.
4. Repeat measurement at center and then at bottom of ring
path. Record readings. This process will determine if cyl-
inder is out-of-round and will also show any cylinder taper
or bulge.
5. Refer to Table 3-20 . If cylinder is not scuffed or scored
and is within service limit, deglaze the cylinder.
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2010 XB Service: Engine 3-53