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CB750 valve adjustment, Valve Clearance, valve adjustment, sohc, sohc4, sohc4 cb750 valve adjustment, CB750K, CB750F, CB750, Honda sohc CB750, Honda sohc CB750 valve adjustment, valve, valves, Valve Clearance

Parts Index               see Carb Synchronization

Tools: Philips & common screwdriver, 10mm open/ box wrench, 10mm socket, .002-.003-.004 feeler gauge, 17mm wrench, breaker bar, 23mm socket or large adjustable wrench.

Perfect wrench            click on image

All inline engines (vertical twins; straight 4s, 6s or 8s) are configured with matching pistons that fire 180 degrees apart.  The simplest way to insure exact valve adjustment is to rely on the fact that the cam lobes on the matching valves (*ex 1-4, in 1-4, ex 2-3, in 2-3) turn exactly opposite of each other, 180 degrees apart.  Sooooooooo, for instance, if you want to adjust the exhaust valve of the #1 cylinder, you can count on the fact that when the exhaust valve of the #4 cylinder opens and then stops moving (fully open), then #1 exhaust is fully closed and right for adjustment.  All *matching or opposite valves (all exhaust or all intake) can be adjusted this way.

When relying on the timing plate for adjusting the valves, the potential for error is in the possibility of slop in the timing chain,  and incorrect timing.  This may seem inconsequential, but I found noticeable difference when doing both in the same day. 

Let's get started!
As indicated by the red arrows, I'm going to start with the #1 and 4 exhaust valves.  Continued...page 2

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CB750 valve adjustment, valve adjustment, sohc, sohc4, sohc4 cb750 valve adjustment, CB750K, CB750F, CB750, Honda sohc CB750, Honda sohc CB750 valve adjustment,valve, valves

 

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