Ignition System - Yamaha TDM850 User Manual

Chapter 5

Ignition system

Contents
General information ..................................................................................
Ignitor unit - check, removal and installation ..........................................
Ignition (main) switch - check, removal and
installation .......................................................................see Chapter 9
Ignition HT coils - check, removal and installation ....................................
Ignition system - check .............................................................................
Ignition timing - general information and check ........................................
Degrees of difficulty
Easy, suitable for
novice with little
experience
Specifications
General information
Cylinder numbering
Left ...........................................................................................................
Right .........................................................................................................
Spark plugs ...................................................................................................
Ignition timing
At idle ...........................................................................................................
Full advance
1991 to 1995 TDM models ........................................................................
XTZ models ...............................................................................................
1996-on TDM models and TRX models ....................................................
Pick-up coil
Resistance
1991 to 1995 TDM models and XTZ models ...........................................
1996-on TDM models and TRX models ....................................................
Ignition HT coils
Primary winding resistance
1991 to 1995 TDM models and all XTZ models ........................................
1996-on TDM models and all TRX models ................................................
Secondary winding resistance (without plug cap)
1991 to 1995 TDM models and all XTZ models ........................................
1996-on TDM models and all TRX models ...............................................
Spark plug cap resistance ............................................................................
Minimum spark gap (see Section 2)..............................................................
Fairly difficult,
Fairly easy, suitable |^ for
beginner with l§ some suitable for competent 5^
experience S DIY mechanic
J
1
Neutral switch - check and replacement ................................ see Chapter 9
5
Pick-up coil - check and replacement ..................................................... 4
Sidestand switch - check and replacement .......................... see Chapter 9
Spark plugs - gap check and replacement ............................. see Chapter 1
3 Throttle position sensor (1996-on TDM and TRX) -
2 check, adjustment and replacement .................................................... 7
6
|k Difficult, suitable for §%,
experienced DIY
IjS mechanic
1
2
see Chapter 1
10° BTDC
42° BTDC @ 5000 rpm
43° BTDC @ 6000 rpm
not available
184 to 276 ohms @ 20°C
192 to 288 ohms @ 20°C
2.38 to 3.22 ohms @ 20°C
3.10 to 4.60 ohms @ 20°C
12.0 to 18.0 K-ohms @ 20°C
10.4 to 15.6 K-ohms @ 20°C
10 K-ohms @ 20°C
6 mm
5»1
Very difficult, ^
>Q suitable for expert DIY 2j
or professional 2^
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