Primary Chain - Buell 2002 S3T Service Manual

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PRIMARY CHAIN

INSPECTION
Check primary chain tension:
●
At the 500 mile (800 km) service interval.
●
At every 5000 mile (8000 km) service interval thereafter.
See Figure 1-28. Measure primary chain tension through the
inspection cover (3) opening. Adjust primary chains not meet-
ing vertical freeplay specifications.
1. See Figure 1-28. Remove two screws (1) and O-rings
(2).
2. Remove inspection cover (3) and O-ring (4) from primary
cover (6).
3. See Figure 1-29. Check primary chain tension by mea-
suring vertical freeplay (4).
a. Measure vertical freeplay through inspection cover
opening (2).
b. Rotate engine to move primary chain to a different
position on sprockets (1, 3).
c. Measure vertical freeplay 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 Step 3 must be within
the specifications listed in
as described under ADJUSTMENT.
NOTE
The initial primary chain vertical freeplay specification used at
the assembly plant is 1/4-3/8 in. (6.4-9.5 mm) with a cold
engine. The 1/4 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 freeplay (with a cold engine), adjust free-
play 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" equip-
ment and methods.
5. See Figure 1-28. Install O-ring (4).
6. Fasten inspection cover (3) to primary cover (6) using
two screws (1) with O-rings (2). Tighten to 40-60 in-lbs
(5-7 Nm).
ADJUSTMENT
NOTE
If vertical freeplay cannot be set within the limits specified,
then primary chain and/or chain adjuster are worn beyond
adjustment limits. Replace parts as necessary. See Section
6.
1. See Figure 1-30. Loosen locknut (1).
2. Turn adjusting screw (2):
a. Clockwise (inward) to reduce freeplay.
b. Counterclockwise (outward) to increase freeplay.
3. Tighten locknut (1) to 20-25 ft-lbs (27-34 Nm).
1-28 2002 Buell S3T: Maintenance
Table 1-9. If necessary, adjust
b0333x1x
2
4
3
1
1. Screw (2)
2. O-Ring (2)
3. Inspection Cover
4. O-Ring
5. Adjusting Screw and Locknut
6. Primary Cover
Figure 1-28. Primary Chain Inspection Cover
b0085a6x
1 2
1. Engine Sprocket
2. Inspection Cover Opening
3. Clutch Sprocket
4. Vertical Freeplay
Figure 1-29. Measuring Primary Chain Tension
Table 1-9. Primary Chain Tension
ENGINE
TEMPERATURE
Cold
Hot (normal running
temperature)
Locknut
Figure 1-30. Primary Chain Adjustment
1.12
6
5
3
4
FREEPLAY
3/8-1/2 in. 9.5-12.7 mm
1/4-3/8 in. 6.4-9.5 mm
Adjusting Screw