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Racing Kit Service Data
Item Standard
Cylinder Head, Valves:
Valve timing:
Duration:
Intake 300°
Exhaust 292°
Camshaft timing (cam lift center):
Intake 104° (ATDC)
Exhaust 102° (BTDC)
Valve clearance:
Intake 0.22 mm
Exhaust 0.20 mm
Squish 0.85 mm
Valve to piston clearance:
Intake 1.45 mm @10°ATDC
Exhaust 1.80 mm @10°BTDC
Ignition System:
Spark plugs
NGK CR9EIA-9 (STD), R0045Q-10 or
R0373A-10
Spark plug tightening torque 13 N·m (1.3 kgf·m, 113 in·lb)
These values show the specifications when standard cylinder head and gasket are used.
Periodic Maintenance Chart
The scheduled maintenance must be done in accordance with this chart to keep the
motorcycle in good running condition.
FREQENCY
OPERATION
Each
Race
Every
2 races
Every
3 races
Every
5 races
Every
10 races
As
Required
Engine
Clutch plate - - check* ●
Throttle grip play - - check* ●
Spark plug - - clean/gap* ●
Engine oil - - change ●
Oil filter - - replace ●
Valve lapping ●
Cylinder head/valve - - decarbonization ●
Cylinder - - check* ●
Piston/cylinder clearance - - check* ●
Piston ring, piston, and piston pin - - replace
(When pistons 13001-0077 are used)
●
Piston ring, piston, and piston pin - - replace
(When pistons 13001-0078 are used)
●
Crankshaft main bearing - - check* ●
5