Drive Chain; Inspection; Drive Chain Sliders - Honda CRF450R Manual Del Propietario Y Guía De Competiciones

Drive Chain

Drive Chain

Refer to Safety Precautions on page 27.
The service life of the chain depends on proper
lubrication and adjustment. Poor maintenance can
cause premature wear or damage to the drive chain
or sprockets.
When the motorcycle is ridden on unusually dusty
or muddy tracks, more frequent maintenance will
be necessary.
Before servicing your drive chain, turn the engine
OFF and check that your transmission is in neutral.

Inspection

1. Turn the engine off, raise the rear wheel off the
ground by placing an optional workstand or
equivalent support under the engine and shift
the transmission into neutral.
2. Check the drive chain slack (1) in the upper
drive chain run midway between the drive (2)
and driven sprockets (3). Drive chain slack
should allow the following vertical movement
by hand:
30 – 40 mm (1.2 – 1.6 in)
102
Servicing Your Honda
30 – 40 mm (1.2 – 1.6 in)
(1)
(2)
(1) drive chain slack (3) driven sprocket
(2) drive sprocket
3. Check drive chain slack at several points along
the chain. The slack should remain constant. If
it isn't, some links may be kinked and binding.
Lubricating the chain will often eliminate
binding and kinking.
NOTICE
Excessive chain slack may allow the drive chain to
damage the engine cases.
4. Inspect the drive chain for:
• damaged rollers
• loose pins
• dry or rusted links
• kinked or binding links
• excessive wear
Replace the drive chain (page 104) if it has
damaged rollers, loose pins, or kinks that cannot be
free. Lubricate the drive chain (page 103) if it
appears dry or shows signs of rust. Lubricate any
kinked or binding links and work them free.
Adjust chain slack if needed (page 103).

Drive Chain Sliders

1. Check the chain slider (1) for wear.
Replace it if below the service limit.
SERVICE LIMIT:
upper side: 5 mm (0.2 in)
lower side: 2.5 mm (0.10 in)
5 mm
(0.2 in)
(3)
2.5 mm
(0.10 in)
(1) chain slider
2. Check the chain guide slider (2) for wear.
Replace the guide slider if it is worn to the
bottom of the wear limit (3).
(2)
(3)
(2) chain guide slider
(1)
(3) wear limit