The bicycle drive unit 1, wherein the detent plate 16 is machined into {HEAD ~ the rotary plate} 5 with {TAIL ~ a plurality} of detent grooves 16 a included therein, 
with
The bicycle drive unit 1 , wherein the detent plate 16 is machined into { HEAD ~ the rotary plate } 5 with { TAIL ~ a plurality } of detent grooves 16 a included therein ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH