1x SCL82-17 - 29x24 6th gear OVERDRIVE
This part includes both primary and secondary gears.
This is the 6th gear from the Overdrive set of ratios:
14x29
15x24
20x26
21x23
19x20
28x24 / 29x24
Ratios are not interchangeable between Direct and Overdrive sets.
Part no 13 in Manual page 10 (Exploded view page 3)
 
Part as photo