3-16 2002 Buell S3T: Engine
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CLEANING AND INSPECTION
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. Check each rocker arm, at pad end and push rod end,
for uneven wear or pitting. Replace rocker arm if either
condition exists.
5. Measure and record rocker arm shaft diameter.
a. Where shaft fits in lower rocker arm cover. See Figure
3-12.
b. Where rocker arm bushings ride. See Figure 3-13.
6. Measure and record rocker arm shaft bore diameter.
a. In lower rocker cover. See Figure 3-14.
b. Rocker arm bushing inner diameter. See Figure 3-
15.
7. Check the measurements obtained in Steps 5-6 against
the SERVICE WEAR LIMITS. Repair or replace parts
exceeding limits.
8. Assemble rocker arms and rocker arm shafts into lower
rocker cover.
9. Check end play of rocker arm with feeler gauge.
Figure 3-12. Measuring Rocker Arm Shaft Diameter
(Rocker Cover Position)
2767a
Figure 3-13. Measuring Rocker Arm Shaft Diameter
(Rocker Arm Bushing Position)
Figure 3-14. Measuring Rocker Arm Shaft Bore
Diameter in Lower Rocker Cover
Figure 3-15. Measuring Rocker Arm Bushing
Inner Diameter
2768a
5699
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