Cleaning
Exhaust Valves
WHAT YOU WILL
NEED:
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Scotch
brite pad
High
quality degreaser
Rags
Thin
razor blade
Step one
Begin by
removing the Servo motor. This can be found by following the cables from the exhaust
valves. At the back of the motor, there are 2 screws that remove the whole
assembly. Removing this will make removing the Valves easier.
Step two
Remove the 4
allen head screws that hold the valve assembly to the cylinder. Do not remove
the 2 allen head screws that attach the cable holder. (explain later)
Step three
Remove the
valve. Be careful not to damage the gasket between the valve assembly and the
cylinder. The valve should slide out easily, if not, they desperately need
cleaning, and have been robbing your power. Keep working them back/fourth and
in/out, and they will come. (maybe you should clean your mind too :>) PAY ATTENTION to which is up and which
is down as you pull the valve out. You will want to put it back in that way.
Step four
7 minutes into
the project, and you are cleaning. Do one valve at a time. Lay the valve on a
rag, use the pipes as a bench, and start with your cleaner and Scotch Brite
pad. You will have to scrub to get that gunk off. Real stubborn deposits can be
CAREFULLY scraped with a thin razor
(x-acto knife). You do not want to scratch you valves all up.
Step five
Put some
cleaner on a rag. Using a pencil (eraser end) clean the valve slot in the
cylinder. BE CAREFUL not to push gunk
into your cylinder. Start in the middle and pull the gunk out. There probably
isn’t any “hard” build-up in there. Most of the hard stuff is on the valve.
Step six
Dry everything
off with a clean rag and re-assemble. Do not over-tighten the allen head bolts.
If you break it, or strip it out, you will have big trouble. I clean my valves
once or twice a year (depending on miles). This is an easy project that can be
done in an hour or two.
If you found a
sticky valve, you will definitely feel, see, and hear improvements.
Written by:
Yamahaulic
We are not responsible for any damages that these modifications may cause to your vehicle, any modifications is your responsibility. We are providing recommendations ONLY.
