Question about 1983 Honda GL 400 Custom
Remove the crankshaft tappet cap at the front of the motor and the timing inspection cap on the top right side of the rear cover.
Take off your valve covers.
Rotate the motor clockwise and align the TL mark with the pulsar index mark. Check that all the valves are loose on the left cylinder. The left cylinder must be at T.D.C. top dead center on the compression stroke.
At this time you can adjust your cam chain tension if you are not out fitted with an automatic cam chain tensioner (the cx650 automatic cam chain tensioner will fit in the manual tension models). Loosen the hex stud above the timing inspection hole and re tighten, done.
IN: 0.08 mm (0.003 in.)
EX: 0.10 mm (0.004 in.)
Adjust the valves on the left head first ("TL" mark). Loosen the lock nut, turn the screw until there is SLIGHT drag on the feeler gauge. It is very important that you do not over tighten the valves. The Rocker assembly floats on oil and will zero tolerance the valves all by itself. If you over tighten the valves it will push the rocker to one side and damage the rocker bearing/shaft. Hold the screw and tighten the lock nut . Recheck the valve clearances.
Rotate the crankshaft clockwise and align the "TR" mark on the rotor with the pulsar index mark. The right cylinder must be at T.D.C. at the compression stroke.Make sure all the valves are loose. Adjust the valves and recheck the tolerance after tightening.
Reassemble the motor.
Posted on Dec 30, 2010
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Posted on Jan 02, 2017
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