Tyres & Tubes - Honda 2009 CRF450X Owner's Manual & Competition Handbook

Refer to Safety Precautions on page 25.
To safely operate your CRF, the tyres must be the
proper type (off-road) and size, in good condition
with adequate tread, and correctly inflated.
WARNING
Using tyres that are excessively worn or
improperly inflated can cause a crash in
which you can be seriously hurt or killed.
Follow all instructions in this owner's
manual regarding tyre inflation and
maintenance.
The following pages give detailed information on
how and when to check your air pressure, how to
inspect your tyres for wear and damage, and our
recommendations on tyre replacement.
Air Pressure
Properly inflated tyres provide the best
combination of handling, tread life, and riding
comfort. Generally, underinflated tyres wear
unevenly, adversely affect handling, and are more
likely to fail from being overheated.
Underinflated tyres can also cause wheel damage
on hard terrain. Overinflated tyres make your
CRF ride harshly, are more prone to damage
from surface hazards, and wear unevenly.
Make sure the valve stem caps are secure. If
necessary, install new caps.
Always check air pressure when your tyres are
"cold." If you check air pressure when your tyres
are "warm" — even if your CRF has only been
ridden for a few miles — the readings will be
higher. If you let air out of warm tyres to match
the recommended cold pressures, the tyres will
be underinflated.
The correct "cold" tyre pressures are:
Front 100 kPa (1.0 kgf/cm 2 , 15 psi)
Rear 100 kPa (1.0 kgf/cm 2 , 15 psi)
If you decide to adjust tyre pressures for a
particular riding condition, make changes a little
at a time.
Inspection
Take time to inspect your tyres and wheels before
you ride.
• Inspect carefully for bumps or bulges in the
side of the tyre or the tread. Replace any tyre
that has a bump or bulge.
• Look closely for cuts, slits, or cracks in the
tyres. Replace a tyre if you can see fabric or
cord.
• Check for rocks or other objects embedded in
the tyre or tread. Remove any objects.
• Check the position of both valve stems. A
tilted valve stem indicates the tube is slipping
inside the tyre or the tyre is slipping on the
rim.
Tyres & Tubes
Tube Replacement
If a tube is punctured or damaged, you should
replace it as soon as possible. A repaired tube
may not have the same reliability as a new one,
and it may fail while you are riding.
Use a replacement tube equivalent to the original.
Servicing Your Honda
HONDA O/M CRF450X (Eu) 3RMEY620 00X3R-MEY-6200
93