Check
1. If the tests shown in the preceding Sections have failed to isolate the cause of an ignition fault, it is possible that the ignition control unit is faulty. No details are available with which the unit can be tested on home workshop equipment. Take the machine to a Honda dealer for testing.
Removal
2. Remove the seat, and on XL650V and XRV750 models the left-hand side panel (see Chapter 8). Note that XL600V-H to R (1987 to 1995) models there are two control units, one for each cylinder.
3. Disconnect the wiring connector(s) and remove the unit (see illustrations).
5.3a. Ignition control unit (arrowed) - XL600V
5.3b. Ignition control unit (arrowed) - XL650V
5.3c. Ignition control unit (arrowed) - XRV750
Installation
4. Installation is the reverse of removal. Make sure the wiring connector(s) is/are correctly and securely connected.