Tuning the 143cc Honda Trail 125 - Big Bore Part 2

How much faster is a 143cc big bore kit on a Trail 125? We use a wide-band AFR to find the right size injector and compare results to before.
0:00 Recap
0:49 Fuel Injector Sizes
1:34 Test Parameters
2:29 Air Fuel Ratio Test
5:05 Octane
7:15 Best Injector?
8:09 EFIE?
10:07 Removing the AFR
11:55 Shifter Mod
12:16 Big Bore Worth It?
#trail125 #ct125 #hondamotorcycles