3-3
MAINTENANCE INTERVALS
COOLING SYSTEM
Check coolant level and leakage●●
Check radiator cap operation●
Replace coolant●Every two years
Inspect hoses●
OUTSIDE NUTS AND BOLTS
Retighten●●Refer to "STARTING AND BREAK-
IN" section in the CHAPTER 1.
AIR FILTER
Clean and lubricate●●Use foam air-filter oil or equivalent oil.
Replace●
OIL FILTER
Replace●●
OIL STRAINER
Clean●
ENGINE GUARD
Replace●Breakage
FRAME
Clean and inspect●●
FUEL TANK, COCK
Clean and inspect●●
BRAKES
Adjust lever position and pedal 
height●●
Lubricate pivot point●●
Check brake disc surface●●
Check fluid level and leakage●●
Retighten brake disc bolts, cali-
per bolts, master cylinder bolts 
and union bolts●●
Replace pads●
Replace brake fluid●Every one year
FRONT FORKS
Inspect and adjust●●
Replace oil●●Suspension oil "S1"
Replace oil seal●
FRONT FORK OIL SEAL AND 
DUST SEAL
Clean and lube●●Lithium base grease
PROTECTOR GUIDE
Replace● ItemAfter 
break-
inEvery 
race 
(about 
2.5 
hours)
Every 
third 
(about 
7.5 
hours)Every 
fifth 
(about 
12.5 
hours)
As re-
quiredRemarks 
3-5
PRE-OPERATION INSPECTION AND MAINTENANCE
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation, practice or a race, make sure the machine is in good operating condition.
Before using this machine, check the following points.
GENERAL INSPECTION AND MAINTENANCE
Item Routine Page
CoolantCheck that coolant is filled up to the radiator cap. Check the cool-
ing system for leakage.P.3-6 – 7
FuelCheck that a fresh gasoline is filled in the fuel tank. Check the fuel 
line for leakage.P.1-13
Engine oilCheck that the oil level is correct. Check the crankcase and oil line 
for leakage.P.3-9 – 10
Gear shifter and clutchCheck that gears can be shifted correctly in order and that the 
clutch operates smoothly.P.3-7
Throttle grip/HousingCheck that the throttle grip operation and free play are correctly 
adjusted. Lubricate the throttle grip and housing, if necessary.P.3-7 – 8
Brakes Check the play of front brake and effect of front and rear brake. P.3-14 – 16
Drive chainCheck drive chain slack and alignment. Check that the drive chain 
is lubricated properly.P.3-17 – 18
WheelsCheck for excessive wear and tire pressure. Check for loose 
spokes and have no excessive play.P.3-20 –  21
SteeringCheck that the handlebar can be turned smoothly and have no ex-
cessive play.P.3-21 –  22
Front forks and rear shock 
absorberCheck that they operate smoothly and there is no oil leakage.
P.3-18 –  20
Cables (wires)Check that the clutch and throttle cables move smoothly. Check 
that they are not caught when the handlebars are turned or when 
the front forks travel up and down.—
Exhaust pipe Check that the exhaust pipe is tightly mounted and has no cracks. P.4-3 –  4
Rear wheel sprocket  Check that the rear wheel sprocket tightening bolt is not loose. P.3-17
Lubrication  Check for smooth operation. Lubricate if necessary. P.3-23
Bolts and nuts  Check the chassis and engine for loose bolts and nuts. P.1-15
Lead connectorsCheck that the CDI magneto, CDI unit, and ignition coil are con-
nected tightly.P.1-7
SettingsIs the machine set suitably for the condition of the racing course 
and weather or by taking into account the results of test runs be-
fore racing? Are inspection and maintenance completely done?P.7-1 –  10