3 softail models, 4 sportster models, Softail models – Zipper's Performance 309-575 User Manual
Page 7: Sportster models

Thunder Heart Performance Corp.
615-672-8811 www.thunder-heart.com
4. Depress the external latches and use a rocking motion to remove the
electrical connector from the ignition control module.
5. Remove the two socket screws to detach the ignition control module
from the electrical bracket.
6. To install the Digital Ignition Module, install and tighten the socket screws
to 50-60 in-lbs. The remainder of installation is the reverse of removal.
2.3
Softail Models
1. Remove the seat.
2. Disconnect the negative battery cable.
3. Remove the two screws to free the ignition control module from the
mounting bracket.
4. Depress the external latches and use a rocking motion to remove the
electrical connector from the ignition control module.
5. To install the Digital Ignition Module, install and tighten the socket screws
to 15-21 in-lbs. The remainder of installation is the reverse of removal.
2.4
Sportster Models
1. Remove the seat.
2. Disconnect the negative battery cable from the crankcase, and
disconnect the positive battery cable from the battery.
3. Depress the external latches and use a rocking motion to remove the
electrical connector from the ignition control module.
4. Remove the two lock nuts securing the ignition module from the
motorcycle.
5. To install the Digital Ignition Module, install and tighten the lock nuts to
12-15 in-lbs. The remainder of installation is the reverse of removal.
309-575 TH-Zip Ignition.doc
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