Engine Rebuild Kit w/ Pistons - Honda CB750 - 1969-1976

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Engine rebuild kit with pistons for the Honda CB750 from 1969-1976. Time to rebuild? If you're diving in and doing a rebuild, honing the cylinders, replacing engine side cover gaskets and replacing some seals this is a great kit to have on hand!

Gasket Set Includes

12329-300-020 - Breather Cover Gasket - x1
12391-300-040 - Cylinder Head Cover Gasket - x1
91302-001-020 - O-Ring 30.8mm - x8
91305-323-000 - O-Ring 5.8 x 1.9mm - x4
91304-286-000 - O-Ring 61.8 x 2mm - x4
12251-300-004 - Cylinder Head Gasket - x1
12191-300-030 - Cylinder Base Gasket - x1
14592-300-000 - Cam Chain Tensioner Gasket - x1
18291-254-000 - Exhaust Gasket - x4
12209-300-003 - Valve Stem Seal - x8
30372-300-300 - Points Cover Gasket - x1
11396-300-303 - Clutch Cover Gasket - x1
11397-300-303 - Alternator Cover Gasket - x1
31282-300-020 - Starter Motor Cover Gasket - x1
11395-300-040 - Transmission Cover Gasket - x1
11398-300-303 - Oil Pan Gasket - x1
15135-300-010 - Oil Pump Gasket - x1
91318-300-013 - Sealing Rubber - x6
12115-300-000 - Cylinder Stud Gasket - x8

Oil Seal Kit Includes:

Clutch Arm Seal
Shift Shaft Seal
Crank Seal
Starting Clutch Gear Seal
Kickstart Oil Seal
Tach Drive Oil Seal
Countershaft Seal

Installation Tips:

  • Be very careful when installing the cylinder over new rings, it's helpful to have the proper tool to keep the rings compressed as you lower the cylinder over the pistons. Try to use only plastic tipped tools to prevent from scratching aluminum surfaces.
  • The Letter stamped on the top two rings should be facing up when installing them and stagger the ring gaps according to the manual.
  • Press your seals in straight with a seal driver or a socket with a slightly smaller OD than the seal. Both surfaces must be free of dirt to create an oil tight seal.
  • All sealing surfaces for gaskets must be clean and flat to make a proper seal, sometimes non-hardening sealant is necessary.

Piston Ring Order:

Top Compression Ring (silver outer rim)
Second Ring (black outer rim)
Bottom Rings (3 pieces - Spacer in the middle - 1 thin ring on either side)

Fits Honda:

CB750K - 1969-1976

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  • 4
    Rebuild kit

    Posted by Stephen Elliott on 5th Mar 2021

    Very good but some O rings not supplied, oil gallery and oil pump O rings not in the kit. No seal for timing chain tensioner or tacho drive