VTech VT 1980 Service Manual download pdf

V-Twin Mfg.

V-TECH 3 IGNITION KIT, DUAL FIRE

FITS EVO, SHOVEL, SPORTSTER 1970 - 1998

VT No. 32-9501

This is a custom application and rider safety depends on proper installation. This product should only be installed by

a knowledgeable and trained motorcycle technician. V-Twin Mfg. accepts no responsibility for improper installation.

The V-TECH 3 ignition system is intended for use with Harley-Davidson motorcycles, The V-Tech 3 replaces the OEM electronic ignition system on 1978 and

later models and the points and mechanical advance on early models.

The V-TECH 3 features an adjustable advance and rev limiter, a timing LED that indicates static timing (top dead center) and gives diagnostic information.

The two starting modes provided are electric start and kick start. A tachometer output gives accurate tachometer readings even at the rev limit.

ADDITIONAL REQUIRED PARTS

FX series BT and XL models prior to 1984, FL series BT models prior to 1985 and all models with OEM points will require V-Twin timing rotor VT No.32-9087.

This part is not included with the V-TECH 3 installation kit.

COIL AND SPARK PLUG CABLE CONSIDERATIONS

We recommend replacing the OEM coil. Coils used with the V-TECH 3 must have at least 2 ohms primary resistance, We recommend the using the VT 32-

9225 coil for optimum results.

Spiral core spark plug wires are recommended for maximum performance, Do not use solid copper spark plug cables, they may cause interference with your

ignition system and accessories.

REMOVAL OF POINTS IGNITION – EARLY MODELS PRIOR TO 1978

1. Turn ignition switch off and disconnect battery ground cable. Disconnect wire going from breaker points to Coil- (negative) terminal.

2. Refer to figure 1, Remove ignition cover plate. gasket. and hardware (items 1-3), Save these items for later use.

3. Note location of breaker plate, There is a V notch in the breaker plate used for alignment, When you install the V-TECH 3, you should align the V

notch in the same location, This should set the timing close enough to start the engine. Remove and save the two standoffs and washers (items 4-

5). Remove the breaker plate assembly, wiring, cam, and advance assembly (items 6-10).

REMOVAL OF OEM ELECTRONIC IGNITION SYSTEM - 1978 AND 1979 MODELS

1. Turn ignition switch off and disconnect battery ground cable.

2. Refer to figure 2. Disconnect wires going from ignition module (item 3) to coil (14).

3. Remove ignition cover plate and hardware (items 1 and 2). Save these items for later re-use. Remove ignition module (3).

4. Note location of timer plate (10). There is a V notch in the timer plate used for alignment. When you install the V-TECH 3, you should align the V

notch in the same location. This should set the timing close enough to start the engine. Remove and save the two standoffs and washers (items 4

and 5). Remove the sensor, shield, timer plate, trigger rotor, and advance assembly (items 6-12).

REMOVAL OF OEM ELECTRONIC IGNITION SYSTEM 1980 AND LATER MODELS

1. Turn ignition switch off and disconnect battery ground cable.

2. Refer to figure 3. Remove O.E. ignition module and wire harness (items 1-4). You will disconnect two wires at the coil, wire going to the vacuum

switch, ground wire at the module, and the 3 pin plug (20) that connects to the sensor plate.

3. Remove ignition cover plates and gasket (items 5-9). This will require drilling out two rivets. The rivets will later be replaced with two supplied self

threading screws.

4. In order to remove the sensor plate cable, the cable plug (20) must be removed first. Use needle nose pliers to pull the terminals out of the plug.

Then pull the cable through the exit hole at the bottom of the timing cover.

5. Note location of sensor plate (11). There is a V notch in the sensor plate used for alignment. When you install the V-TECH 3, you should align the V

notch in the same location. This should set the timing close enough to start the engine. Remove and save the two standoffs and washers (10).

Remove the sensor plate (item 11).

V-TECH 3-TECH 3 INSTALLATION

1. Refer to figure 5. The V-TECH 3 requires H-D timing rotor PIN 32402-83. Check your rotor (9) for correct part number. For models prior to 1980, use

the supplied 10-32 x 3/4" cap screw and washer to mount the rotor.

2. Install HI-4 system in place of O.E. breaker or sensor plate. Rotate the V-TECH 3 about 90 degrees to give better access to the cable exit hole.

Install the V-TECH 3 first, then push the cable through the hole. Align the V notch on the V-TECH 3 same as the O.E. plate you removed. Use the

OEM. standoffs to secure the V-TECH 3. You must use lock washers under the standoffs for proper clearance between the V-TECH 3 and cover

plate. Route the V-TECH 3 wire harness along the frame rails up to the coil. Secure harness with tie wraps. Do not install timing cover.

V-TECH 3 HOOKUP

Use the ring terminals for coil hookup. Use male-female quick disconnects for connections to the tachometer and vacuum switch (VOES).

1. Identify switched + 12 volt wire and tach wire (if equipped) going to the coil. Refer to your service manual, or reconnect the battery and use a test

light or voltmeter. The switched + 12 volt wire will be hot when the ignition key is turned on.

2. Refer to figure 4. Connect the V-TECH 3 red wire and switched + 12 volt wire to Coil + (positive). Note: Most motorcycle coils do not have terminals

marked, use one terminal for Coil + (positive) and the other for Coil (negative).

3. Connect the V-TECH 3 black wire to the Coil – terminal.

4. Connect the V-TECH 3 green wire to the vacuum switch (figure 3, item 19), if used.

5. Connect the HI-4 brown wire to the tachometer wire, if equipped with tachometer.

6. The V-TECH 3 is grounded via the timing housing, a separate ground connection is not required. The V-TECH 3 white wire is not used and must be

taped up.

7. Reconnect battery ground cable.

Street Driven Models With O.E. Vacuum Switch (VOES).

We recommend that you connect the VOES to the V-TECH 3. If you connect the VOES, you must use the OEM points advance curve. This will give you the

best fuel economy and drive ability, while protecting your engine from detonation.

Street Driven Models Without O.E. Vacuum Switch (VOES). This includes most models prior to 1985. Fuel economy and drive ability will be improved if you

install a VOES and connect it to the V-TECH 3. If you connect the VOES, you must use the "0EM. Points" advance curve. Use HD VOES PIN 26566-91.

Race Only Applications. When using the" Race Only" advance curve, vacuum advance is not supported. Tape up the unused green vacuum switch wire from

the V-TECH 3.

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Summary of Contents

Page 1

V-Twin Mfg.V-TECH 3 IGNITION KIT, DUAL FIREFITS EVO, SHOVEL, SPORTSTER 1970 - 1998VT No. 32-9501This is a custom application and rider safety depends

Page 2

V-Tech 3 SETUP AND OPERATION Refer to the label on the V-TECH 3. Set the two switches for your type of engine and starting preference. Kick start mode