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GEN
INFO
1 - 6
SPECIAL TOOLS
SPECIAL TOOLS
The proper special tools are necessary for complete and accurate tune-up and assembly. Using the
correct special tool will help prevent damage caused by the use of improper tools or improvised
techniques. The shape and part number used for the special tool differ by country, so two types are
provided. Refer to the list provided to avoid errors when placing an order.
NOTE:
For U.S.A. and Canada, use part number starting with “YM- ”, “YU- ”, “YS- ” or “ACC- ”.
For others, use part number starting with “90890- ”.
Part number Tool name/How to use Illustration
YU-01083-3, 90890-01084
YU-01083-1, 90890-01083 Weight
Slide hammer bolt
These tools are used when removing or installing the
rocker arm shafts. YU-01083-3
YU-01083-1
90890-01084
90890-01083
YU-03112-C, 90890-03112 Pocket tester Use this tool to inspect the coil resistance, output
voltage and amperage. YU-03112-C 90890-03112
YM-04019, 90890-04019 Valve spring compressor This tool is needed to remove and install the valve
assemblies. YM-04019 90890-04019
YM-04108, 90890-04108 Valve spring compressor attachment This tool is needed to remove and install the valve
assemblies. YM-04108 90890-04108
YU-01304, 90890-01304 Piston pin puller set This tool is used to remove the piston pin. YU-01304 90890-01304
YM-01312-A, 90890-01312 Fuel level gauge This gauge is used to measure the fuel level in the
float chamber. YM-01312-A 90890-01312
YM-08035-A, 90890-01311 Tappet adjusting tool This tool is necessary for adjusting valve clearance. YM-08035-A 90890-01311
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SPEC
2 - 1
EC200000
SPECIFICATIONS
EC211000
GENERAL SPECIFICATIONS
Model name: TT-R50EV (USA, CDN, AUS, NZ)TT-R50E (Europe, ZA)
Model code number: 1P61 (USA) 1P62 (CDN)
1P63 (Europe, AUS, NZ, ZA)
Dimensions: Overall length 1,305 mm (51.4 in)
Overall width 595 mm (23.4 in)
Overall height 775 mm (30.5 in)
Seat height 555 mm (21.9 in)
Wheelbase 925 mm (36.4 in)
Minimum ground clearance 135 mm (5.31 in)
Dry weight: Without oil and fuel 54.0 kg (119 lb)
Engine: Engine type Air cooled 4-stroke, SOHC
Cylinder arrangement Forward-inclined single cylinder
Displacement 49.5 cm
3 (3.02 cu.in)
Bore × stroke 36.0 × 48.6 mm (1.42 × 1.91 in)
Compression ratio 9.5 : 1
Compression pressure (STD) 1,300 kPa (13 kg/cm
2, 185 psi) at 600 r/min
Starting system Electric starter
Lubrication system: Wet sump
Oil type or grade: Engine oil
(For USA and CDN)
At –10 °C (14 °F) or higher È
Yamalube 4 (10W-30) or SAE 10W-30 type
SE/SF/SG motor oil
At 5 °C (41 °F) or higher É
Yamalube 4 (20W-40) or SAE 20W-40 type
SE/SF/SG motor oil
(Except for USA and CDN)
API “SE/SF/SG ” or higher grade
0 10 30 50 70 90 110 130
-20 -10 0 10
20
30 40 50
È
É
˚F
˚C
GENERAL SPECIFICATIONS
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SPEC
2 - 2
Oil capacity:
Engine oil Periodic oil change 0.8 L (0.70 Imp qt, 0.85 US qt)
Total amount 1.0 L (0.88 Imp qt, 1.06 US qt)
Air filter: Wet element
Fuel: Type Unleaded gasoline only (USA, AUS and NZ) Regular unleaded gasoline only
(CDN, Europe and ZA)
Tank capacity 3.1 L (0.68 Imp gal, 0.82 US gal)
Reserve amount 0.4 L (0.09 Imp gal, 0.11 US gal)
Carburetor: Type VM11
Manufacturer MIKUNI
Spark plug: Type CR7HSA
Manufacturer NGK
Gap 0.6 ~ 0.7 mm (0.024 ~ 0.028 in)
Clutch type: Wet, multiple-disc and centrifugal automatic
Transmission: Primary reduction system Spur gear
Primary reduction ratio 67/18 (3.722)
Secondary reduction system Chain drive
Secondary reduction ratio 37/13 (2.846)
Transmission type Constant mesh, 3-speed
Operation Left foot operation
Gear ratio: 1st 39/12 (3.250) 2nd 33/19 (1.736)
3rd 28/23 (1.217)
Chassis: Frame type Steel tube backbone
Caster angle 25.50 °
Trail 34.0 mm (1.34 in)
Tire: Type With tube
Size (front) 2.50-10 4PR
Size (rear) 2.50-10 4PR
Manufacturer (front and rear) CHENG SHIN
Type (front and rear) KNOBBY
Tire pressure (front and rear) 100 kPa (1.00 kgf/cm
2, 14.2 psi)
Brake: Front brake type Drum brake
Operation Right hand operation
Rear brake type Drum brake
Operation Right foot operation
GENERAL SPECIFICATIONS
1
2
3
4
5
6
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SPEC
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Oil ring
Dimensions (B × T) 1.50 × 1.60 mm
(0.059 × 0.063 in) ----
End gap (installed) 0.20 ~ 0.70 mm (0.008 ~ 0.028 in)----
Crankshaft: Crank width “A” 42.95 ~ 43.00 mm (1.691 ~ 1.693 in)----
Runout limit “C” ---- 0.03 mm (0.0012 in)
Big end side clearance “D” 0.10 ~ 0.40 mm (0.0039 ~ 0.0157 in)0.50 mm
(0.02 in)
Big end radial clearance “E” 0.010 ~ 0.025 mm (0.0004 ~ 0.0010 in)0.05 mm
(0.002 in)
Clutch: Friction plate Thickness 2.92 ~ 3.08 mm (0.115 ~ 0.121 in)2.82 mm
(0.111 in)
Quantity 2 ----
Clutch plate 1 Thickness 1.85 ~ 2.15 mm (0.073 ~ 0.085 in)----
Quantity 1 ----
Warp limit ---- 0.2 mm (0.008 in)
Clutch plate 2 Thickness 1.95 ~ 2.05 mm (0.077 ~ 0.081 in)----
Quantity 1 ----
Warp limit ---- 0.2 mm (0.008 in)
Clutch plate 3 Thickness 1.90 ~ 2.10 mm (0.075 ~ 0.083 in)----
Quantity 1 ----
Warp limit ---- 0.2 mm (0.008 in)
Automatic centrifugal clutch: Clutch-in revolution 2,300 ~ 2,700 r/min ----
Clutch-stall revolution 3,210 ~ 3,710 r/min ----
Shifter: Shifter type Shift drum and guide bar ---- Item Standard Limit
B
T
CC
D
A
E
MAINTENANCE SPECIFICATIONS
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SPEC
2 - 9
Carburetor:
I. D. mark 1P61 00 ----
Main jet (M.J) #62.5 ----
Main nozzle (N.J) E-2M ----
Main air jet (M.A.J) ø 1.4 ----
Jet needle (J.N) 4DL22-1 ----
Cutaway (C.A) 2.5 ----
Pilot outlet (P.O) ø 0.8 × 1.5 ----
Pilot jet (P.J) #12.5 ----
Valve seat size (V.S) ø 1.2 ----
Starter jet 1 (G.S.1) #20 ----
Starter jet 2 (G.S.2) ø 0.6 ----
Float height (F.H) 18.5 mm (0.73 in) ----
Fuel level (F.L) 2.0 ~ 3.0 mm (0.08 ~ 0.12 in) ----
Engine idle speed 1,600 ~ 1,800 r/min ----
Lubrication system: Oil filter type Wire mesh type ----
Oil pump type Trochoid type ----
Inner-rotor-to-outer-rotor-tip clearance 0.15 mm or less (0.0061 in or less)0.20 mm
(0.0079 in)
Outer-rotor-to-oil-pump-housing clearance 0.07 mm (0.0028 in)0.15 mm
(0.0059 in)
Oil-pump-housing-to-inner-rotor-and-outer-
rotor clearance 0.06 ~ 0.10 mm
(0.0024 ~ 0.0039 in)0.17 mm
(0.0067 in)
Item Standard Limit
MAINTENANCE SPECIFICATIONS
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SPEC
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EC212300
ELECTRICALItem Standard Limit
Ignition system: Advancer Digital ----
CDI: Magneto-model/manufacturer F1P6/MORIC ----
Pickup coil resistance (color) 248 ~ 372 Ω at 20 °C (68 °F)
(Red – White) ----
CDI unit model/manufacturer 1P6/SHY ----
Ignition coil: Model/manufacturer 4FP/SHY ----
Minimum spark gap 6 mm (0.24 in) ----
Primary winding resistance 0.32 ~ 0.48 Ω at 20 °C (68 °F) ----
Secondary winding resistance 5.68 ~ 8.52 k Ω at 20 °C (68 °F) ----
Spark plug cap: Type Resin ----
Resistance 10 k Ω at 20 °C (68 °F) ----
Charging system: System type AC magneto ----
Model/manufacturer F1P6/SHY ----
Normal output 14 V/80 W at 5,000 r/min ----
Charging coil resistance (color) 0.96 ~ 1.44 Ω at 20 °C (68 °F)
(White – Black) ----
Lighting coil resistance (color) 0.80 ~ 1.20 Ω at 20 °C (68 °F)
(Yellow – Black) ----
Rectifier/regulator: Regulator type Semiconductor short circuit ----
Model/manufacturer SH620B-12/SHINDENGEN ----
No-load regulated voltage (DC) 14.0 ~ 15.0 V ----
No-load regulated voltage (AC) 13.0 ~ 14.0 V ----
Rectifier capacity 8 A ----
Battery: Model YT4B-BS or GT4B-5 ----
Voltage capacity 12 V 2.3 Ah or 12 V 2.5 Ah ----
Electric starting system: Type Constant mesh ----
Starter motor: Model/manufacturer 1P6/SHY ----
Operation voltage 12 V ----
Output 0.25 kW ----
Armature coil resistance 0.035 ~ 0.043 Ω at 20 °C (68 °F) ----
Brush overall length 7 mm (0.28 in) 3.5 mm (0.14 in)
Brush quantity 2 pcs. ----
MAINTENANCE SPECIFICATIONS
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2 - 4
SPEC
CARACTERISTIQUES D’ENTRETIEN
MOTEUR
Elément Standard Limite
Culasse: Limite de d éformation ---- 0,05 mm
(0,0020 in)
Cylindre: Alésage 35,995 à 36,015 mm
(1,4171 à 1,4179 in) 36,05 mm
(1,419 in)
Arbre à cames:
M éthode de transmission Transmission par cha îne (gauche) ----
Dimensions de came
Admission “A ” 25,428 à 25,528 mm
(1,0011 à 1,0050 in) 25,328 mm
(0,9972 in)
“ B ” 21,034 à 21,134 mm
(0,8281 à 0,8320 in) 20,934 mm
(0,8242 in)
Echappement “A ” 25,286 à 25,386 mm
(0,9955 à 0,9994 in) 25,186 mm
(0,9916 in)
“ B ” 21,047 à 21,147 mm
(0,8286 à 0,8326 in) 20,947 mm
(0,8247 in)
Limite de voile d ’arbre à cames ---- 0,03 mm
(0,0012 in)
Cha îne de came:
Type de cha îne de came/nbre de maillons 92RH2005-84M/84 ----
M éthode de r églage de la cha îne de came Automatique ----
CARACTERISTIQUES D ’ENTRETIEN
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2 - 11
SPEC
CHASSISElément Standard Limite
Syst ème de direction:
Type de roulement de direction Roulement oblique ----
Suspension avant: Débattement de fourche 96 mm (3,78 in) ----
Raideur de ressort K1 7,95 N/mm (0,81 kgf/mm, 45,39 lb/in)----
K2 10,50 N/mm (1,07 kgf/mm, 59,96 lb/in) ----
Ressort/entretoise en option Non ----
Diam ètre ext érieur du tube plongeur 21,7 mm (0,85 in) ----
Suspension arri ère:
D ébattement d ’amortisseur 47 mm (1,85 in) ----
Longueur de ressort libre 114 mm (4,49 in) ----
Longueur mont é 110 mm (4,33 in) ----
Raideur de ressort, standard K = 29,0 N/mm (2,96 kgf/mm, 166 lb/in)----
Ressort en option Non ----
Bras oscillant: Limite de jeu du bras oscillant A l ’extr émit é ---- 1,0 mm (0,0394 in)
Jeu lat éral ---- 0,3 mm (0,0118 in)
Roue: Type de roue avant Roue à rayons ----
Type de roue arri ère Roue à rayons ----
Taille/mat ériau de la jante avant 10 × 1,40/acier ----
Taille/mat ériau de la jante arri ère 10 × 1,40/acier ----
Limite de voile de la jante: Radial ---- 2,0 mm (0,08 in)
Lat éral ---- 2,0 mm (0,08 in)
Cha îne de transmission:
Type/fabricant 420/KMC ----
Nombre de maillons 79 maillons + attache ----
Fl èche de la cha îne 35 à 45 mm (1,38 à 1,77 in) ----
Longueur de la cha îne (15 maillons) ---- 194,3 mm
(7,65 in)
CARACTERISTIQUES D’ENTRETIEN