Mutoh VJ-1638 CR motor- DG-42456, This is original Mutoh CR motor

Leisai Motor iSV5718V36-1000 for Allwin printer 

VJ-1608/1638 CR Drive Pulley DG-42457

VP-540 Assy, Scan Motor - 6700469020， this is Generic motor

VS-640 Assy, Feed Motor - 6701409040, Original

AC Servo Leadshine Motor / LEISAI Motor/

Model :AC M6004L2H-A0-B   /

400W, 3000r/min, 1.27 N.m

RE-640/ RA-640 Scan Motor - 6701979020, Oringinal

Allwin / LECAI / YINGHE/ HUMAN Inkjet motor  ISV5718V36-1000

Mutoh XpertJet 1682 1641 Media Feed Flange

Generic Scan motor for Roland SP-300 SP540V SP300V CR Y motor

SP-300 assy, scan motor-7876709010

this is Japan Generic sp-300 scan motor, the life longer than another.