Primary Chain; Inspection; Adjustment - Buell XB 2010 Service Manual

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PRIMARY CHAIN

INSPECTION

See Figure 1-21. Measure primary chain tension through the
inspection cover opening. Adjust primary chains not meeting
vertical free play specifications.
1. Disconnect battery negative (-) cable.
2. See Figure 1-21. Remove two fasteners with captive
washers and primary chain inspection cover with gasket
from primary cover.
3. See Figure 1-22. Check primary chain tension by meas-
uring vertical free play.
a. Measure vertical free play through chain inspection
cover opening.
b. Rotate engine to move primary chain to a different
position on sprockets.
c. Measure vertical free play several times, each time
with primary chain moved so that the measurement
is taken with sprockets rotated to the tightest chain
position.
4. The tightest measurement taken in the previous step must
be within the specifications listed in
sary, adjust as described under

Adjustment.

NOTE
The initial primary chain vertical free play specification used
at the assembly plant is 1/4-1/2 in. (6.4-12.7 mm) with a cold
engine. The 1/2 in. (6.4 mm) minimum is only allowed at the
absolute tightest point in the drive, as measured with special-
ized factory equipment. If a chain has less than 1/4 in. (6.4
mm) vertical tension (with a cold engine), adjust tension to the
"field" specification of 3/8-1/2 in. (9.5-12.7 mm). The looser
specification will avoid overtightening, which might otherwise
occur during adjustment using "non-factory" equipment and
methods.
5. See Figure 1-21. Install primary chain inspection cover
and new gasket to primary cover using two fasteners with
captive washers. Tighten fasteners to 84-108 in-lbs (9.5-
12.2 Nm).
6. Connect battery negative (-) cable and tighten screw to
60-70 in-lbs (6.8-7.9 Nm)
1-22 2010 XB Service: Maintenance
Table 1-6. If neces-

1.10 PRIMARY CHAIN,

ADJUSTMENT
If vertical free play cannot be set within the limits specified,
then primary chain and/or chain adjuster are worn beyond
adjustment limits. Replace parts as necessary. See
5.6 PRIMARY
1.
2.
sm00097
Figure 1-21. Primary Chain Inspection Cover
sm00095
Figure 1-22. Measuring Primary Chain Free Play
Table 1-6. Primary Chain Free Play: XB Models
ENGINE TEMPERATURE
Cold
Operating temperature
NOTE
CHAIN.
See Figure 1-23. Loosen locknut (1).
Turn adjusting fastener (2):
a. Clockwise (inward) to increase tension (reduce free
play).
b. Counterclockwise (outward) to reduce tension
(increase free play).
1.10
in mm
3/8-1/2 9.5-12.7
1/4-3/8 6.4-9.5