12- SERVICING TABLE
At every use Check the bolts and screws tightening
Check the silent-block conditions
After the first 10 hours Change the gear oil level
Check carburation
Check the spark plug electrode distance
Every 25 hours Replace the spark plug
Clean the air filter
Replace the muffler springs
Every 50 hours Change the gear oil
Replace the silencer deadening material
Every 100 hours or every year Replace the air filter
Replace the starter rope
Replace the diaphragm and clean it
Replace the silent-block
Replace the fuel system pipes
Replace the reed valves
Every 100 hours Check the piston and piston rings
Replace the pin and rollers cage
Decarbonise and clean the decompression hole
Disassemble the reduction gear and check the clutch and bell wear
Every 200 hours Replace the piston and piston rings
Replace the reed valve
Every 400 hours Replace all the bearings and seals
Replace the crankshaft
100 200
TIGHTENING TORQUE VALUE FOR ENGINE BOLTS AND
SCREWS
M N.m Kgf.m Lbf.ft
Locking
compound
•
HEAD NUTS THOR 100 7 14 1,4 10,3
•
HEAD NUTS THOR 200 6 14 1,4 10,3
•
HEAD NUTS THOR 200 8 22 2,2 16,2
•
CRANKSHAFT NUT - CLUTCH SIDE 12 60 6 44,4
• •
CRANKSHAFT NUT - IGNITION SIDE 10 40 4 29,5
• •
PROPELLER CENTRAL SCREW 10 40 4 29,5 LOCTITE 243
• •
SPARK PLUG 20 2 14,8
•
COUNTERSHFAT THOR 200 12 60 6 44
•
CLUTCH NUT THOR 200 20 80 8 59
• •
CRANKCASE SCREWS 6 8 0,8 5,9
• •
CARBURATOR LOCKING SCREWS 6 8 0,8 5,9
• •
INTAKE MANIFOLD LOCKING SCREWS 6 8 0,8 5,9
• •
MUFFLER STUDS NUTS 6 10 1 7,4 LOCTITE 270
• •
SILENCER LOCKING SCREWS 8 15 1,5 11,1 LOCTITE 243
• •
MUFFLER LOCKING SCREWS 8 15 1,5 11,1 LOCTITE 243
STANDARD TIGHTENING TORQUE VALUES N.m Kgf.m Lbf.ft
5mm Bolts and nuts 6 0,6 4,44
6mm Bolts and nuts 10 1 7,40
8mm Bolts and nuts 25 2,5 18,50
10mm Bolts and nuts 45 4,5 33,30
12mm Bolts and nuts 55 5,5 40,70
13- PROBLEMS DIAGNOSTIC REASON REMEDY
The engine doesn't start Out of petrol Add petrol
Petrol doesn't reach the carburetor Check the fuel system circuit
Old or wrong petrol Empty the tank and the fuel system circuit and replace the petrol.
Flooded engine
Remove the spark plug, start the engine, dry or replace the
spark plug.
Defective spark plug Replace it
Blackened spark plug or wet Clean and dry the spark plug or replace it
Earthened switching off cable Check the wiring
Spark plug hood Check it
Carburetor has problems Clean and check it; eventually replace the diaphragm
No spark Check the ignition, coil and wiring
The engine doesn't idle Dirty carburetor Calibrate the carburetor
Out-of-adjustment screws Clean and check it; eventually replace the diaphragm
Defective spark plug Replace it
The engine doesn't reach the maxi-
mum rpm
Wrong carburetion Calibrate the carburetor
The carburetor has problems Clean and check it; eventually replace the diaphragm
The reed valve has problems Replace the reeds or the whole reed valve
Dirty air filter Clean or replace it
Dirty exhaust system Clean or replace the deadening material
Engine revved up when idling Out-of-adjustment screws Calibrate the carburetor
Air through the gaskets Replace the gaskets and seals
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