Honda1978–1988Technical specifications

TN Acty 0.6: Technical specifications

Workshop data for the 0.6-litre petrol. Covers engine, fluids, service and torques: the figures to check before a job or a parts order.

Summary

Match these figures to the vehicle’s VIN plate and service book before ordering parts.

Vehicle specifications

Overview

Make: Honda
Model: TN Acty
Years: 1978–1988
Fuel: Petrol

Performance & efficiency

Power: 31 kW (42 hp)
Engine size: 545 cc
Cylinders: 2 · OHC
Compression ratio: 8.3:1
Fuel system: Keihin

Fluids & capacities

Engine oil (with the filter): 2.8 litres

All 74 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	2/OHC
Capacity (Fiscal) cc	545 (549)
Compression ratio :1	8,3
Suitable for unleaded petrol	Yes
Minimum octane rating RON	95
Ignition system Type	SZ
Ignition system Description	CB
Fuel system Make	Keihin
Fuel system Description	Carb-FJ

Ignition system

Ignition coil Make	Hitachi
Primary resistance Ohm	0,0-9,9
Distributor (ECM) Make	Hitachi
Contact breaker gap/trigger air gap mm	0,45-0,55
Dwell angle °(%)	49-55

Firing order

The firing order for the Honda TN Acty 0.6 (1978–1988) is 1-2.

Firing order	1-2

Valve clearances

Valve clearances for the Honda TN Acty 0.6 (1978–1988) are 0,12-0,18 mm inlet and 0,15-0,18 mm exhaust, measured cold.

Valve clearance - INLET mm	0,12-0,18 cold
Valve clearance - EXHAUST mm	0,15-0,18 cold

Engine oil & fluids

Engine oil

The Honda TN Acty 0.6 (1978–1988) takes 2.8 litres of engine oil with the filter. The specified engine oil grade is SAE 15W-30 for moderate climates, with API/ACEA classification SG.

Manual gearbox

The manual gearbox has a listed capacity of 1.9 litres.

Coolant

The listed total cooling-system capacity is 5.0 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	Moderate climate
Engine oil grade SAE	15W-30
Engine oil classification API/ACEA	SG
Engine with filter(s) litres	2.8
Other lubricants and capacities
Manual transmission litres	1.9
Cooling system - total capacity litres	5.0

Service & electrical

Ignition timing

Basic ignition timing for the Honda TN Acty 0.6 (1978–1988) is 17° BTDC at 950 rpm.

Ignition timing	With vacuum
Ignition timing - basic BTDC °Engine/rpm	17/950
Ignition timing - alternative °Engine/rpm	-82=5

Battery

The Honda TN Acty 0.6 (1978–1988) uses a 12 V, 35 Ah battery (reserve capacity 40 minutes).

Battery V/RC(Ah)	12/40 (35)

Spark plugs

The Honda TN Acty 0.6 (1978–1988) uses Bosch WR8DC spark plugs with a 0,9 mm electrode gap.

Spark plugs Original equipment	Bosch
Spark plug Type	WR8DC
Electrode gap mm	0,9
Spark plugs Make	Autolite
Spark plug Type	63
Electrode gap mm	0,8
Spark plugs Make	Bosch
Spark plug Type	WR8DC
Electrode gap mm	0,9
Spark plugs Make	Champion
Spark plug Type	RN7YC
Electrode gap mm	0,8
Spark plugs Make	NGK
Spark plug Type	BR7ES
Electrode gap mm	0,8

Tuning and emissions

Ignition advance checks °Engine/rpm	8-14/2000
Ignition advance checks °Engine/rpm	21-24/3000
Ignition advance checks °Engine/rpm	28-32/4500
Vacuum check	Ignition timing advances
Vacuum range °Engine	8-12
Vacuum starts mbar	90
Vacuum ends mbar	170
Idle speed rpm	950±100
Fast idle speed - MT/AT rpm	2700-3700
Oil temperature °C	60
CO level at idle speed - tailpipe Vol. % CO	0,5
HC level at idle speed ppm	300
HC level at idle - alternative ppm	-1980=500
CO2 level at idle speed Vol. % CO2	13-16
O2 level at idle speed Vol. % O2	0,5-2,0

Starting and charging

Starter motor Make	Hitachi
Starter motor Type	0,8kW
Minimum starting voltage V	8,0
Maximum cranking amps A	95-116
Regulated voltage V	13,5-14,5

Service checks and adjustments

Compression pressure bar	9,5-13,5
Radiator cap bar	0,75-1,05
Thermostat opens °C	80-84
Drive belt tension - alternator/PAS/AC mm	11-16

Fuel system

Fuel pump delivery pressure bar	0,07-0,15

Tightening torques

Cylinder head bolt torque

The cylinder head bolt torque for the Honda TN Acty 0.6 (1978–1988) is 55-65 Nm.

Cylinder head
Tighten	55-65 Nm

Other engine tightening torques
Main bearings Stage 1	18-21 Nm
Main bearings Stage 2	37-43 Nm
Big end bearings Stage 1	11-13 Nm
Big end bearings Stage 2	22-26 Nm
Flywheel/driveplate	47-53 Nm
Spark plugs	15-20 Nm

Frequently asked questions

What is the firing order of the Honda TN Acty 0.6?

The firing order for the Honda TN Acty 0.6 (1978–1988) is 1-2.

What spark plugs does the Honda TN Acty 0.6 use?

The Honda TN Acty 0.6 (1978–1988) uses Bosch WR8DC spark plugs with a 0,9 mm electrode gap.

How much oil does the Honda TN Acty 0.6 take?

The Honda TN Acty 0.6 (1978–1988) takes 2.8 litres of engine oil with the filter. The specified engine oil grade is SAE 15W-30 for moderate climates, with API/ACEA classification SG.

What are the valve clearances for the Honda TN Acty 0.6?

Valve clearances for the Honda TN Acty 0.6 (1978–1988) are 0,12-0,18 mm inlet and 0,15-0,18 mm exhaust, measured cold.

What is the cylinder head torque for the Honda TN Acty 0.6?

The cylinder head bolt torque for the Honda TN Acty 0.6 (1978–1988) is 55-65 Nm.

What is the ignition timing for the Honda TN Acty 0.6?

Basic ignition timing for the Honda TN Acty 0.6 (1978–1988) is 17° BTDC at 950 rpm.