tx750 special interest site
  MOTORCYCLE SERVICE NEWS NUMBER
302
PAGE
2 of 4
  YAMAHA INTERNATIONAL CORPORATION
BUENA PARK, CALIFORNIA 90620
DATE 12/8/72
 

TX750                         MISCELLANEOUS SERVICE INSTRUCTIONS (cont.)

STARTER CHAIN AND SPROCKETS. The pitch of the starter chain and sprockets has been changed from 7.774mm (E/N~3264) to 9.525mm (E/N 3265~). If the chain or either sprocket must be replaced, convert to the new chain and corresponding sprockets. Old type will not be stocked. Conversion to the larger pitch requires that both chain and sprockets be changed as a set. See Table below for part numbers of both types.
 
NOTE: Starter Chain Guide Assembly (Ref. #7-14, 1st Edition Parts List) must be removed when new type parts are installed.

REF. NO. PART NAME OLD PART NO. NEW PART NO.
7-1 SPROCKET, starter 1 341-15518-00-00 341-15518-01-00
7-2 SPROCKET, starter 2 341-15519-04-00 341-15519-05-00
7-3 CHAIN 945-62190-62-00
(DK219FT 62L)
945-63160-52-00
(DID316FT 52L)

NOTE: When installing starter sprocket 2 (Parts List, Ref. #7-2),
either old or new type, apply molybdenum disulfide grease to
the bushing during assembly.

CAMSHAFT TIMING. The illustration on Page 22, TX750 Service manual is incorrect. The cam sprocket punchmark should be 90° clockwise of the groove. See illustration at right and correct manual accordingly.