Buell 2003XB9S Service Manual page 252

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CLEANING AND INSPECTION
Cylinder Heads
11 1
WARNING
Low pressure compressed air can blow debris into your
face and eyes. Always wear eye protection or a face
shield when using pressurized air. Failure to take ade-
quate safety precautions could result in death or serious
injury.
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.
WARNING
6609
Figure 3-68. Checking Gasket Surface
4. See Figure 3-68. 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).
2003 Buell XB9S: Engine 3-49