I made a VLOG when i changed my front sprocket. I used the JT 1439.13 it's definitely more peppy in 1st!
Empulse TT Front Sprocket Change VLOG Part 1 - Kickstand Assembly
Empulse TT Front Sprocket Change VLOG Part 2 - Front Sprocket Swap
Empulse TT Front Sprocket Change VLOG Part 3 - How To Chain Adjustment
Empulse TT Front Sprocket Change VLOG Part 4 - 13 Tooth Sprocket Test Ride