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Re: Valve specs for VT 500 honda shadow 1983
Hi, Your valve clearances should be: Intake .08-.12 mm (.003-.005 in) Exhaust .12-.16 mm (.005-.006 in) I usually start all gaps in the middle of given specs, then fine tune from there. Hope this helps
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I may be wrong but there is no Spec. It is a matter of tightening lower nut until the Valves run quiet then tighten the other as a Lock nut so the lower one doesn't loosen up.
Or if it's a solid Lifter setup, you need to gap the valve with the lower nut to the correct gap then tighten the Locknut above
The ring should be placed down in the cylinder bore squarely(use an inverted piston with only the bottom ring installed to get it even).Measure the gap in the ring with a set of feeler gauges.(an assembly manual should list the spec).It is important the gap is correct-too tight will cause the piston to seize in the bore when it reaches operating temperature.Too loose,and you will have excessive compression loss and oil consumption.A manual ring grinder is fairly inexpensive(if you can fabricate your own like I did,it is even cheaper).
It does not close the fuel intake in the carb, it is the valve with rubber on top of valve, this valve is attach to float. When this rubber is dirty or worn it doesn't close the fuel when the float is at max, so the fuel goes out through upper rubber pipe.
Lot;s of things can be the problem for power pick up. When did you last tune up the bike's engine? Are the spark plugs correctly gapped are the valve clearance to it's specs? Is the clutch slipping? You need to check these all.