Question about 1979 Honda CX 500 A
Remove the crankshaft hole cap on the front cover and the timing inspection hole cap from the rear cover. remove the spark plug caps and valve covers. Put 17mm socket into the front of the motor and rotate the crankshaft counter clockwise and align the "TL" mark on the rotor with the pulsar index mark(little arrow bump).The left cylinder must be at top dead center of the compression stroke(both intake and exhaust valve rockers are loose).Now adjust the valve clearances of the left cylinder. IN: 0.08 mm (0.003 in)
EX: 0.10 mm (0.004 in)
Adjust so there is a slight drag on the feeler gauge. Do not set too tight, oil pressure in the rocker bearings will zero tolerance the valves. Set the valves too tight and you damage the rocker bearings. The motor is now in the correct position to adjust the cam chain tensioner. Loosen the cam chain tensioner lock bolt located right above the rear cover timing inspection hole. When the bolt is loosened the cam chain tensioner will automatically position itself to provide the correct tension. Retighten the tensioner lock bolt. Next turn the engine and align the "TR" mark on the motor so the right cylinder is at top dead center of the compression stroke and adjust the valves.
Posted on Aug 31, 2010
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Posted on Jan 02, 2017
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