DrkAngel wrote:Finally got around to trying the 13T mod on an eZip.
13T motor sprocket replaces the 9T oem sprocket.
A partial disassembly was necessary ... only because I wanted to use an intact chain rather than using a repair link.
(Repair link usage would merely require loosening adjustments, but repair link degrades chain consistency! durability? )
Required a chain length of 15 - 2 T links - 30 tooth holes.
9T - 20T requires 14 - 2T links (OEM)
9T - 16T requires 13 - 2T links (16T mod)
13T - 20T requires 15 - 2T links (13T mod)
(16T combined with 13T might use OEM chain?)
Sprocket alignment is excellent!
21-22mph motor only w/25.9V Li-ion battery, 24mph with moderate pedaling.
Acceleration seems improved 15 - 20mph.
16T mod leaves eZips in the <20mph "legal" range, while the 13T mod provide a motor only >20mph speed and assist past 25mph!
1/2" x 1/8" - single speed (410) chain
"15 - 2 T links - 30 tooth holes" ... ?
The existence of the "half link" has me being tentative about calling a 1 tooth segment a "link".
I used a Walmart "chainbreaker" to build proper length chain.
Chainbreaker will put chain back together without using master link-repair link.
As mentioned previously, this requires some disassembly, but produces a "better job".
Bell chain, from Walmart includes repair-link-master link, if you want to go that way.
Plenty of chain left if you want to try a single "solid" chain later ...