Buell XB 2008 Series, Service Manual, Page: 275 / 688

CLEANING AND INSPECTION
TOOL NAME PART NUMBER
VALVE GUIDE HONE B-45525
VALVE GUIDE CLEANING BRUSH HD-34751
Cylinder Heads
Compressed air can pierce the skin and flying debris from
compressed air could cause serious eye injury. Wear
safety glasses when working with compressed air. Never
use your hand to check for air leaks or to determine air
flow rates. (00061a)
1. Bead blast or scrape carbon from head, top of cylinder
and valve ports. Be careful to avoid scratching or nicking
cylinder head and cylinder joint faces. Blow off loosened
carbon or dirt with compressed air.
2. Soak cylinder head in an aluminum-compatible
cleaner/solvent to loosen carbon deposits.
3. Wash all parts in non-flammable solvent, followed by a
thorough washing with hot, soapy water. Blow out oil
passages in head. Be sure they are free of sludge and
carbon particles. Remove loosened carbon from valve
head and stem using a wire wheel. Never use a file or
other hardened tool which could scratch or nick valve.
Polish valve stem with very fine emery cloth or steel wool.
4. See Figure 3-49 . Check head gasket surface on head for
flatness. Machine or replace any head which exceeds
SERVICE WEAR LIMIT of 0.006 in. (0.152 mm).
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Figure 3-49. Checking Gasket Surface
Rocker Arm Assemblies
1. Check each rocker arm, at pad end and push rod end, for
uneven wear or pitting. Replace rocker arm if either condi-
tion exists.
2. Measure and record rocker arm shaft diameter.
a. See Figure 3-50 . Measure where shaft fits in lower
rocker arm cover.
b. See Figure 3-51 . Measure where rocker arm bushings
ride. Measure twice at 90° apart. Record the smaller
measurement.
3. Measure and record rocker arm shaft bore diameter.
a. See Figure 3-52 . Measure bore of lower rocker cover.
b. See Figure 3-53 . Measure rocker arm bushing inner
diameter. Measure twice at 90° apart. Record the
larger measurement.
sm00138
Figure 3-50. Measuring Rocker Arm Shaft Diameter (Rocker
Cover Position)
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Figure 3-51. Measuring Rocker Arm Shaft Diameter (Rocker
Arm Bushing Position)
2008 XB Service: Engine 3-39