1984 Official Honda TRX200 Shop Manual, Page 151Get this manual
W TRANSM ISSONCRANKSHAFT TIMING SPROCKET AND Oil PUMP DRiVE GEAR INSPECTION
Inspect the timing sprocket and oi pump drive gear teet for wear or damage Replace the parts if necessaryInstall new sprocket, aligning any tooth center with the keyway center in the crankshah Dove in the parts with he following 10015 iming sprocket: Driver 077460020100 Att ac hm ent, 20 mm 1.0077460020400 Oil pump driver gearDr iver Attachment, 25 mm 1.0TOOTH CENTE R