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CJ750 toolbox Adjusting
the valves on a flathead CJ |
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Your SV CJ will need to have its
valve clearance adjusted periodically. I try to do mine
once a year, usually during the winter maintenance
sessions. Here's the right-side access cover. All you
need is a regular screwdriver to remove it. (Photo by Francois
Roux) |
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Off it comes. You'll need to use
sealer when reinstalling the covers. These compartments
are pressurized by the oil pump and will leak if not
sealed. (Photo by Francois Roux) |
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If your bike was built in autumn,
you may need to remove some Chinese tree leaves. (Photo
by Francois Roux) |
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The adjusting nuts are the ones at
the bottom of the frame. (The locking nuts are the ones
above them.) Move the adjusting nuts to set the gap
between the push rods and the valve stems. (Photo by Francois
Roux) |
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A feeler guage is used to check the gap.
There are conflicting specs regarding the size of the gap
so I use .004" (0.10mm) for both the intake and the
exhaust valves. This has always worked well for my bikes.
(CJs can tolerate a lot of slop.) These adjustments are
always done on a cold engine. |
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Here's a better view. (Photo by Francois
Roux) |
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Two 14mm open-end wrenches in
position. The closest nut is for making the adjustment
and the other one is the lockdown nut. |
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This wrench is on the lock nut for
the exhaust valve. (Photo by Francois Roux) |
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Time for new cover gaskets. The
green one is a Chinese gasket I use as a pattern.
Underneath is 1/8" cork gasket material from our
NAPA store. |
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Trace the pattern with a pen... |
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...and cut them out with scissors. Viola,
two new gaskets. It's not rocket science. |
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Make sure the gasket mating surfaces are
spotless. |
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Ditto on the covers. I lightly shined them
using a fine wire wheel on my bench grinder. You should
always use some sort of sealer on the gaskets. Just about
anything will do but I just happened to have some
Permatex 2A Form-a-Gasket on hand, so that's what I used. |
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And, being a novice, I generally use too
much of the stuff. Whatever squishes out the sides when
you screw the cover down will wipe right off. Oil will
not leak here. Trust me. |
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Done. The whole job takes about 15-20
minutes. |
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