Oil Seal, Rv37129.5 Kz400d4 1977 Canada

Professional engine builders replace inlet and exhaust valves, springs inner and outer, valve guides, retaining cotters, seats, tappets and retainers as a matter of course when carrying out a cylinder-head overhaul.
Also the valve train itself requires close examination, the condition of the camshaft lobes, cam-chain, tensioner and guide should all be considered when overhauling the top-end.
The valves and the interfacing components have a tough time and can become brittle with age and wear. Broken bits of metal are not too good for the engine!
Other cylinder-head and valve train related components you may wish to renew at the same time as this part:

120041087
120041021P
120051085
490781065
490781066
132H0685
670B2015
670D1506
670D3048
110041158
110081219
110091105
160651151
321021352
120441114
120441197
120461062
120481094
120531107
120531134
120531222
120531223
920011859
920261146
920571226
920811626

Don't forget to order all the seals, gaskets and new fasteners required?

Add as many items as you wish to the same shopping cart, new retainers 12009005 spring seats 160071024 and collets (keepers) 12011004 for example, and still only pay the same single fixed price shipping cost.

This component may have other applications within the Kawasaki model range.