Buell 2002 S3T, Service Manual

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2002 Buell S3T: Engine 3-17
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10. Replace rocker arm or lower cover or both if end play
exceeds 0.025 in. (0.635 mm).
11. Valve heads should have a seating surface width of
0.040-0.062 in. (1.016-1.575 mm), and should be free of
pit marks and burn spots. The color of carbon on exhaust
valves should be black or dark brown. White or light buff
carbon indicates excessive heat and burning.
12. Valve seats are also subject to wear, pitting, and burning.
Resurface valve seats whenever valves are refinished.
13. Clean valve guides by lightly honing with VALVE GUIDE
HONE (Part No. HD-34723).
14. Scrub guides with VALVE GUIDE BRUSH (Part No. HD-
34751) and hot soapy water. Measure valve stem outer
diameter and valve guide inner diameter. Check mea-
surements against SERVICE WEAR LIMITS.
15. Inspect spark plug threads for damage. If threads in
head are damaged, a special plug type insert can be
installed using a 12 mm spark plug repair kit.
16. Inspect valve springs for broken or discolored coils.
17. See Figure 3-16. Check free length and compression
force of each spring. Compare with SERVICE WEAR
LIMITS. If spring length is shorter than specification or if
spring compression force is below specification, replace
spring.
18. Examine push rods, particularly the ball ends. Replace
any rods that are bent, worn, discolored or broken.
19. See Figure 3-17. 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).
Rocker Arms and Bushings
1. See Figure 3-18. To replace worn bushings, press or
drive them from the rocker arm. If bushing is difficult to
remove, turn a 9/16-18 tap into bushing. From opposite
side of rocker arm, press out bushing and tap.
2. Press replacement bushing into rocker arm, flush with
arm end, and split portion of bushing towards top of arm
3. Using remaining old bushing as a pilot, line ream new
bushing with
ROCKER ARM BUSHING REAMER (Part
No. HD-94804-57) .
4. Repeat for other end of rocker arm.
Figure 3-16. Checking Spring Free Length
b0323x3x
Figure 3-17. Checking Gasket Surface
Figure 3-18. Removing Rocker Arm Bushing
5700
9/16 in. -18 Tap
2411a