Buell XB 2010 Service Manual page 313

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11. When you accomplish a complete clean-up of the 46°
angle and the width is at least 0.062 in. (1.575 mm), pro-
ceed to the next step.
12. Select the proper 60° cutter and gently slide the cutter
down the cutter pilot to the valve seat.
13. Remove just enough material to provide an even valve
seat width of 0.040-0.062 in. (1.016-1.575 mm).
14. Remove cutter pilot and wash head thoroughly and dry
completely.
15. Repeat the process on any valve seat that needs service.
16. Insert valve to be used in the valve guide and bottom on
the valve seat. Positioning the cylinder head port upwards
and with slight thumb pressure against the valve, com-
pletely fill the port with solvent to verify proper seal
between the valve and the valve seat.
NOTE
Hold pressure against the valve for a minimum of 10 seconds.
If any leakage occurs, examine the valve seat for irregularities
or defects and if necessary repeat the above cutting process.
sm00148
1
3
4
1. Minimum: 0.040 in. (1.016 mm) / Maximum: 0.062
in. (1.575 mm)
2. 60 degrees
3. 31 degrees
4. 46 degrees
5. Margin
Figure 3-59. Valve and Seat Dimensions
ASSEMBLY
PART NUMBER
HD-34736B VALVE SPRING COMPRESSOR
HD-34751 VALVE GUIDE CLEANING BRUSH
1. Wash cylinder head and valves in warm, soapy water to
remove all debris from cutting valve seats.
2. Scrub valve guide bores with VALVE GUIDE CLEANING
BRUSH (Part No. HD-34751) and hot, soapy water.
2
5
TOOL NAME
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)
3. Blow dry with compressed air.
4. Apply a liberal amount of engine oil to the valve stem.
5. See Figure 3-47. Insert valve into valve guide and bottom
valve on valve seat.
6. See Figure 3-60. Place a protective sleeve over the valve
stem keeper groove.
NOTE
Failure to use a protective sleeve on the valve stem keeper
groove when installing the valve stem seal and collar assembly
will result in damage to the seal causing leakage around the
valve stem, excessive oil consumption and valve sticking.
7. See Figure 3-62. Coat the sleeve with oil and place a new
seal and lower collar assembly over the valve stem and
onto valve guide.
NOTES
See Figure 3-61. The valve seal is incorporated into the
lower collar and is installed by hand. NO SPECIAL TOOLS
ARE REQUIRED.
The seal is completely installed when the lower collar
contacts the machined surface of the head.
Do not remove valve after seal is installed. Repeated
installations will damage seal.
8. Install valve spring and upper collar.
9. See Figure 3-63. Compress spring with VALVE SPRING
COMPRESSOR (Part No. HD-34736B).
NOTE
A single valve spring is used for each valve. The inner and
outer springs are combined into one tapered spring that is
progressively wound.
10. Insert valve retainers into upper collar, making sure they
engage grooves in valve stem.
11. Release and remove from VALVE SPRING COM-
PRESSOR.
12. Repeat previous steps for the remaining valve.
2010 XB Service: Engine 3-45