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extract from Advanced Modifications
<onlyinclude>
;Goal
: A reverse mode is handy when trying to push the bike rearwards uphill, or in tricky traction conditions.
: Sevcon's market primarily consists of forklifts and tractors, so the Sevcon is already set up for reverse operation.
: Naturally, a reverse mode is unsafe for motorcycles beyond a very limited speed (5mph, say).
Trikester worked with Harlan to install a reverse mode switch on a 2013 FX.
* [http://electricmotorcycleforum.com/boards/index.php?topic=3365 Reverse Switch added to FX]
* [http://electricmotorcycleforum.com/boards/index.php?topic=5147.0 Reverse switch addition]
;Note
: Recent Zero models (2016? seems IPM-related) have a glitch when reverse mode is configured using the standard Sevcon recommendation.
: Zero custom firmware could be interfering, or it could be a custom setting; unclear which yet.
;How It Works
: The Sevcon controller can be programmed to take a digital/binary input as a reverse mode directive.
: The Sevcon as used by Zero has some unused pins; one of the digital inputs will be needed for the extra signal. Use SevCon's DVT software and IXXAT cabling to configure this.
: Since Zero programs the Sevcon to operate in torque mode instead of speed mode, the reverse mode allows the throttle to operate like a variable regen that transitions to reverse from 0mph.
: The transition to reverse can be configured a bit for some motorcycle-specific safety, but mainly to avoid a jerky transition.
: Torque and speed limits can be set separately for reverse operation (40% and 5mph are good to start with).
;Control
: The enable needs to be dual-throw to turn off the forward input signal and turn on the reverse input signal, so use a DPDT or SPDT switch, or a SPST switch that drives a relay.
: A momentary push button switch is better for control safety, since any instability while moving in reverse should be resolvable by letting go of the control.
:: Any kind of binary switch can be used (toggle, etc), technically, but getting into a stuck reverse situation could be dangerous.
: Mounting the switch should account for keeping the wiring protected and secure, and the switch should either be weather-rated or in a protective enclosure.
: Mount location should be accessible from the left handlebar but not where it can be accidentally engaged.
:: Trikester's mount placed it in front of the handle, requiring the index finger to extend to reach it.
</onlyinclude>
[[Category:Advanced Modification]]
;Goal
: A reverse mode is handy when trying to push the bike rearwards uphill, or in tricky traction conditions.
: Sevcon's market primarily consists of forklifts and tractors, so the Sevcon is already set up for reverse operation.
: Naturally, a reverse mode is unsafe for motorcycles beyond a very limited speed (5mph, say).
Trikester worked with Harlan to install a reverse mode switch on a 2013 FX.
* [http://electricmotorcycleforum.com/boards/index.php?topic=3365 Reverse Switch added to FX]
* [http://electricmotorcycleforum.com/boards/index.php?topic=5147.0 Reverse switch addition]
;Note
: Recent Zero models (2016? seems IPM-related) have a glitch when reverse mode is configured using the standard Sevcon recommendation.
: Zero custom firmware could be interfering, or it could be a custom setting; unclear which yet.
;How It Works
: The Sevcon controller can be programmed to take a digital/binary input as a reverse mode directive.
: The Sevcon as used by Zero has some unused pins; one of the digital inputs will be needed for the extra signal. Use SevCon's DVT software and IXXAT cabling to configure this.
: Since Zero programs the Sevcon to operate in torque mode instead of speed mode, the reverse mode allows the throttle to operate like a variable regen that transitions to reverse from 0mph.
: The transition to reverse can be configured a bit for some motorcycle-specific safety, but mainly to avoid a jerky transition.
: Torque and speed limits can be set separately for reverse operation (40% and 5mph are good to start with).
;Control
: The enable needs to be dual-throw to turn off the forward input signal and turn on the reverse input signal, so use a DPDT or SPDT switch, or a SPST switch that drives a relay.
: A momentary push button switch is better for control safety, since any instability while moving in reverse should be resolvable by letting go of the control.
:: Any kind of binary switch can be used (toggle, etc), technically, but getting into a stuck reverse situation could be dangerous.
: Mounting the switch should account for keeping the wiring protected and secure, and the switch should either be weather-rated or in a protective enclosure.
: Mount location should be accessible from the left handlebar but not where it can be accidentally engaged.
:: Trikester's mount placed it in front of the handle, requiring the index finger to extend to reach it.
</onlyinclude>
[[Category:Advanced Modification]]