Engine Rebuild Kit - Honda CB450K CL450K CB500T

Engine rebuild kit for the Honda CB/CL450 and 500 twins from the 60's and 70's. Time to rebuild? If you're diving in and doing the top end, replacing engine cover gaskets and replacing seals this is a great kit to have on hand!

Note: This kit only fits 5 speed models. We have a separate kit for the 4 speed CB450K0 here.

Gasket Set Includes:

91302-283-000 (updated part number 91302-283-003) - O-RING (75.8X2) - x2
91314-220-000 - O-RING (16.4 x 2.4) - x1
12209-283-000 - O-RING (12X1) - x4
14791-319-005 - Valve Stem Seal - x4
12909-428-003 (updated part number 12909-333-000) - cylinder stud seal - x2
18291-283-010 (updated part number 18291-MM8-880) - exhaust gasket - x2
12251-283-020 (updated part number 12251-283-306) - Cylinder head gasket - x1
12191-283-010 (updated part number 12191-283-306) - Cylinder base gasket - x1
16229-283-010 (updated part number 16229-283-306) - carburetor insulator gasket - x2
12316-283-310 (updated part number 12316-283-306) - Gasket A cylinder head cover rear - x2
12393-283-010 (updated part number 12393-283-306) - Gasket B cylinder head cover front - x2
12394-283-000 (updated part number 12394-283-306) - Gasket cover cylinder head left and right - x3
12394-283-000 (updated part number 12394-283-306) - Gasket behind tach cover - x1
30391-283-010 (updated part number 30391-283-306) - Points cover gasket - x1
14591-283-000 (updated part number 14591-283-306) - Cam chain tensioner gasket - x1
11691-283-000 (updated part number 11691-283-306) - Alternator cover gasket - x1
11395-283-000 (updated part number 11395-283-306) - Left Crankcase cover gasket - x1
11394-292-000 (updated part number 11394-292-306) - Right Crankcase cover gasket - x1

Oil Seal Kit Includes:

Left Crankcase - Clutch adjuster Seal
Tachometer Seal
Countershaft Seal
Upper and lower Crankcase Seal - x2
Points Seal
Main Shaft Seal
Right Crankcase Cover 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.
• 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:

CB450K1-K7 Super Sport - 1968-1974 (Only fits 5 speed models)
CL450K Scrambler - 1968-1974
CB500T Twin DOHC - 1975-1976