Tanaka TBC-420PF, Service Manual

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2. Technical Data
Model TBC-420PF TBC-4200D TBC-550 series TBC-600
430PF series series
Displacement (cc) 39.8 39.8 46.5 46.5
Bore x Stroke (mm) 39.8 x 32 39.8 x 32 43 x 32 43 x 32
Compression ratio 7.2 : 1 6.95:1 7.0 : 1 7.0 : 1
Max. PS/rpm 1.7/6500 1.78/7000 2.38/7000 2.38/7000
Max. kW/rpm 1.25/6000 1.31/7000 1.75/7000 1.75/7000
Max. kg m/rpm 0.22/5000 0.21/5000 0.26/6000 0.26/6000
Max. rpm 11000 11500 11500 11500
Idling rpm 3000±200 2800±200 2800±200 2800±200
Clutch-meet rpm 3800±200 3500±200 3800±200 3800±200
Carburetor (maker/type) WYJ224B WYJ389 HDA180 HDA180
Fixed Jet (main jet #) # 44 # 51 N/A N/A
L/H needle set N/A N/A 90 90
Metering lever height (mm) 1.50±0.16 (frm face
of pump body)
1.50±0.16 (frm face
of pump body)
-0.13 0.25 (frm
face of carb. body)
-0.13 0.25 (frm
face of carb. body)
Ignition system
TCI (Transistorized
Solid State)
TCI (Transistorized
Solid State)
TCI (Transistorized
Solid State)
TCI (Transistorized
Solid State)
Air gap (mm)
0.30 - 0.35 0.30 - 0.35 0.30 - 0.35 0.30 - 0.35
Ignition timing ( ) 30 23 23 23
Spark plug(maker) CJ8Y(CHPN) or BPMR-6A (NGK) BPM-6A(NGK) or BPMR-6A(NGK)
RCJ8Y(CHPN) BPMR-6A(NGK) or BPM-6A(NGK)
Gap (mm) 0.6 0.6 0.6 0.6
Clutch drum Diameter (mm) 78 78 78 78
Gear Ratio 1.31 3 : 1 1.313 : 1 1.313 : 1 1.313 : 1
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