Yamaha YDRA Owner's/Operator's Manual page 47

ENGINE
Items
Description:
Engine type
Number of cylinders
Displacement
Bore x stroke
Compression ratio
Rated output
Cooling system
Starting system
Ignition system
Spark plug type
Spark plug gap
Lubrication system
Engine oil type
Engine oil capacity
Oil change quantity
TRANSMISSION
Items
Transmission:
Type
V-belt width and outer line length
V-belt wear limit
Governor:
Type
Factory speed setting
Differential/reduction gear:
JC0
SPECIFICATIONS
YDRA PTV
4-stroke, Gasoline, OHV
Single
357 cm
85 x 63 mm (3.30 x 2.48 in.)
8.1:1
8.5 kw (11.4 hp)/3500 rpm
Forced air-cooled
Starter
TCI Magneto
BPR2ES
0.7-0.8 mm (0.028-0.031 in.)
Splash
YAMALUBE 4-cycle oil or SAE 10W30
1.0 L, 1000 cc (1.0 US qt)
1.0 L, 1000 cc (1.0 US qt)
YDRA PTV
V-belt automatic centrifugal engagement
31.0 x 1010 mm (1.20 x 39.76 in.)
27.0 mm (1.06 in.)
Oil bath flyweight
19 km/h (12 mph)
Secondary reduction system helical gear
Secondary reduction ratio:
Forward 11.34:1; Reverse 15.25:1
Differential type bevel gear
Lubricant/capacity SAE 90 gear oil/355 cc
(355 mL, 0.38 US qt)
3
10-2
1
2
3
4
5
6
7
8
9
10
11