Page 50 of 88

5. Install the panel.
EAUS1601
To change the coolant
1. Put the vehicle on a level surface
and let the engine cool if neces-
sary.
2. Remove cowling C and panel A.
(See page 6-8).
3. Place a container under the engi-
ne to collect the used coolant.
4. Remove the radiator cap retai-
ning bolt, radiator cap retainer
and radiator cap. WARNING!
Never attempt to remove the
radiator cap when the engine is
hot.
[EWA10381]
1. Radiator cap retaining bolt
2. Radiator cap
3. Radiator cap retainer
5. Remove the coolant drain bolt to
drain the cooling system.
1. Coolant drain bolt
6. Remove the coolant reservoir
cap.7. Disconnect the coolant reservoir
hose on the reservoir side and
drain the coolant from the reser-
voir.
1. Coolant reservoir
2. Coolant reservoir hose
8. After draining the coolant, tho-
roughly flush the cooling system
with clean tap water.
9. Replace the coolant drain bolt
washer if it is damaged, and then
tighten the coolant drain bolt to
the specified torque.
10. Connect the coolant reservoir
hose.
Tightening torque:
Coolant drain bolt:
9 Nm (0.9 m•kgf, 6.5 ft•lbf)
Coolant reservoir capacity (up to
the maximum level mark):
0.29 L (0.31 US qt, 0.26 Imp.qt)
PERIODIC MAINTENANCE AND ADJUSTMENT
6-14
6
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Page 51 of 88

11. Pour the recommended coolant
into the radiator until it is full.
12. Install the radiator cap.
13. Run the engine several minutes.
Stop the engine and recheck the
coolant level in the radiator. If it is
low, add more coolant until it rea-
ches the top of the radiator.
14. Install the radiator cap, radiator
cap retainer and radiator cap
retaining bolt.
15. Fill the coolant reservoir with
coolant up to the maximum level.
16. Install the coolant reservoir cap
and check for coolant leakage.TIP
If any leakage is found, ask a Yamaha
dealer to inspect the cooling system.
17. Install the cowling and the panel.
EAU40371
Air filter element
The air filter element should be clea-
ned or replaced at the intervals speci-
fied in the periodic maintenance and
lubrication chart. Have a Yamaha
dealer clean or replace the air filter
element.Recommended antifreeze:
High quality ethylene glycol
antifreeze containing corrosion
inhibitors for aluminum engines
Antifreeze/water mixing ratio:
1:1
Coolant quantity:
Radiator capacity (including all
routes):
0.70 L (0.74 US qt, 0.62 Imp.qt)
Coolant reservoir capacity:
0.29 L (0.31 US qt, 0.26 Imp.qt)
PERIODIC MAINTENANCE AND ADJUSTMENT
6-15
6
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Page 79 of 88

Dimensions:Overall length:
2202 mm (86.7 in)
Overall width:
689 mm (27.1 in)
Overall height:
1175 mm (46.3 in)
Seat height:
820 mm (32.3 in)
Wheelbase:
1341 mm (52.8 in)
Ground clearance:
151 mm (5.94 in)
Minimum turning radius:
2900 mm (114.2 in)
Weight:With oil and fuel:
124.0 kg (273 lb)
Engine:Engine type:
Liquid cooled 2-stroke
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
49.7 cm
3
Bore x stroke:
40.3 x 39.0 mm (1.59 x 1.54 in)
Compression ratio:
11.50 :1
Starting system:
Electric starter
Lubrication system:
Separate lubrication (Yamaha autolube)Type:
YAMALUBE 2 or 2-stroke engine oil
(JASO FC grade) or (ISO EG-C or EG-D
grade)
Quantity:
1.40 L (1.48 US qt, 1.23 Imp.qt)
Transmission oil:Oil change quantity:
0.75 L (0.79 US qt, 0.66 Imp.qt)
Type:
SAE 10W-30 type SE motor oil
Cooling system:Coolant reservoir capacity (up to the maxi-
mum level mark):
0.29 L (0.31 US qt, 0.26 Imp.qt)
Radiator capacity (including all routes):
0.70 L (0.74 US qt, 0.62 Imp.qt)
Air filter:Air filter element:
Wet element
Fuel:Recommended fuel:
Regular unleaded gasoline only
Fuel tank capacity:
13.8 L (3.65 US gal, 3.04 Imp.gal)
Fuel reserve amount:
2.2 L (0.58 US gal, 0.48 Imp.gal)
Carburetor:Manufacturer:
DELL’ORTO
Type x quantity:
PHBN 16 x 1
Spark plug (s):Manufacturer/model:
NGK / BR9 ES
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Clutch:Clutch type:
Wet, multiple-disc
Transmission:Primary reduction system:
Helical gear
Primary reduction ratio:
71/20 (3.55)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
60/11 (5.45)
Transmission type:
Constant mesh 6-speed
Operation:
Left foot operation
Gear ratio:1st:
36/12 (3.00)
2nd:
33/16 (2.062)
3rd:
29/19 (1.526)
4th:
27/22 (1.227)
5th:
25/24 (1.041)
6th:
24/25 (0.960)
SPECIFICATIONS
8-1
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