zippo wrote:I've had a Currie izip tricycle for over 4 years--loved it for 3. ... I could use some help in upgrading my trike, particularly for speed. I'm in New Mexico and a have been known to throw my trike in the back of my pickup truck when traveling to Texas and California.
Check - eZip-iZip Regearing for speed
Since your eTrike is in the 2008-2009 age bracket (?), try a higher voltage battery input , some controllers had no HVC (high voltage cutt-off).
If 24V oem try 36V, Lithium batteries offer 25.9V, 29.6V, 33.3V, 37V etc.
If 36V oem try 48V, Lithium batteries offer 40.7V, 44.4V, 48.1V etc.
Every voltage step-up increases speed. And torque!
Sorry ... in the minus column, you will have to monitor-consider increased motor heat production!