Buell XB 2010, Service Manual

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5. Rims and tires out-of-round or eccentric with hub: tire
runout should not be more than 0.060 in. (1.5 mm).
6. Irregular or peaked front tire tread wear.
7. Tire and wheel unbalanced or weights on wrong side of
wheel (Front wheel weights must be on brake rotor side
of wheel.).
8. Steering head bearings improperly tightened or worn. See
1.17 STEERING HEAD BEARINGS . Check for proper
torque and replace worn bearings. See 2.17 FORK
CLAMPS .
9. Shock absorber or front forks not functioning normally due
to incorrect adjustment.
10. Heavy front end loading. Non-standard equipment on the
front end (such as heavy radio receivers, extra lighting
equipment or luggage) tends to cause unstable handling.
SUSPENSION
When making adjustments, remember there are two mediums
in setting up a motorcycle, geometry and suspension. Both
components work together because suspension is a part of
geometry. In order to solve handling problems, it is important
to diagnose the problem's true nature.
Chattering, sliding or an uncomfortable feeling are suspension-
related. Handling and a swinging fork are geometry-related,
but often these unwanted characteristics can be solved by
suspension adjustments.
The following tables list possible suspension and operating
troubles and their probable causes.
Table 1-13. General Suspension Problems
ADJUSTMENT SOLUTION TROUBLESHOOTING CONDITION
Increase rebound damping. Motorcycle wallows through turns.
Feels loose or vague after bumps.
Wheel tends to "pogo" after passing over a bump. This is noticeable by watching the
motorcycle continue to bounce as it travels over multiple bumps.
Reduce rebound damping. Wheel responds to bump, but doesn't return to ground quickly after bumps. This is
more pronounced over a series of bumps and is often referred to as "packing down".
Increase compression damping. The motorcycle bottoms out or dips while cornering.
Motorcycle has excessive brake dive.
Reduce compression damping. Harsh ride particularly over washboard surfaces.
Bumps kick through handlebars or seat.
Suspension seems not to respond to bumps. This is evidenced by tire chattering (a
movement with short stroke and high frequency) through corners or by jolting the
rider over rough roads.
Table 1-14. Rear Suspension Problems
ADJUSTMENT SOLUTION TROUBLESHOOTING CONDITION
The shock is too soft. Increase compression damping. If the
adjuster is already set to the maximum, add more preload to
the spring (one turn maximum). "Pumping on the Rear" when accelerating out of a corner:
movement with a long stroke and a high frequency
The shock is too hard. Decrease compression damping. "Pumping on the Rear" when accelerating out of a corner:
movement with a short stroke and high frequency
Decrease the compression damping. If the problem persists,
decrease rebound damping for a faster rebound rate. Less spring
preload may also help. Chattering during braking
The suspension is too soft. Increase compression damping. Lack of tire feedback
The suspension is too hard. Decrease compression damping. Sliding during cornering
(Sliding may occur going into the corner or accelerating out of
the corner.)
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