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Oklahomawing.com
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Shifting Fork Blues
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Many Goldwing 1500 owners have experienced what has been
referred to as a bent shifting fork. You know when you
have it. It can be manifest through a few different symptoms
or all of the following. At times while riding along and you
shift into 4th (either from 5th down or 3rd up) you let your clutch
out and give it the gas only to have the bike pop right back out of
gear. Some have stated that they cannot even get it to go into
4th. Or... You are slowing down and downshifting
as you prepare to stop. While decelerating in 3rd,
2nd and 1st you hear the unmistakable sound of gravel in a Pepsi can
coming from your gearbox. Its a sad sound indeed because you
got it and there is no way around it.
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There are 3 ways
to handle this problem. The first is to sell your bike immediately
and get a new 1800 Goldwing. That solution is not that
practical for some so you have to look at numbers 2 and 3.
The second solution is to start shopping and find a good used 1500
engine from a bike that has been salvaged. You can either
do the work yourself or hire it done by a local shop. I
have seen engines on the internet for anywhere from $500 for
older engines to $2500 for the later model engines. Now
once you make that purchase remember, unless you are going to
install it yourself you will probably be paying between $300 to $500
for someone to install it for you. The third option is
to take the engine out and tear it down and do the work yourself.
That means splitting the case and saying hi to your pistons and transmission
personally. I cannot stress this part enough... Unless
you are a mechanic or an EXTREMELY competent shade tree
mechanic I would advise that you go the used engine route or pay someone
to do the engine work for you. Cost: I spent about $600
on parts. Those who have decided to keep their engine
and have the work done spent between $2500 and $3500 for parts and
labor.
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The purpose
of this article is to provide some insight, pictures and inside
information for those who are trying to decide how to approach their
transmission issues and also give some tips that might make the job
go easier and perhaps avoid some "gotcha's".
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Getting right into the nuts
and bolts of the problem... The left arrow points to 5th gear,
the right arrow points to 4th. The center white arrow is pointing
at the shift fork and the red arrow points to the problem. That
gap between the shift fork and the sidewall of that groove that the
fork rides in allows that shifter to bounce back and forth between
4th and 5th and those big cogs (sometimes called "dogs") bump the
inner dogs of the 4th and 5th gears. This only occurs while
in the first 3 gears because if you are in 4th or 5th that shifter
will be fully engaged inside the 4th or 5th gear.
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This is the new shift fork and shift collar
installed. Notice how the shift fork fills the collar gap fully
allowing no play of the collar while the transmission is in this configuration.
Also notice that the dogs are larger on the shift collar on the 4th
gear side then they were on the old collar. That means when
you order your parts you will be replacing your 4th gear for
sure and 5th gear if it looks worn on the dogs as well as your
shift collar and shift fork. I replaced my 5th gear too.
More on that later.
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Old fork new fork. I hope I don't have to
explain the problem here.
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Its time to pull the engine. My Craftsman bike jack worked great
for this job. It provided a nice large solid base to support
the engine while it was being lowered and moved around and eventually
reinstalled.
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The Honda Service Manual
suggests pulling the right intake manifold and right cam pulley cover
to provide more room to manuever the engine out of the frame but I
have heard that some have removed it with both manifolds in place.
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Get a digital camera and take lots of pictures of the job in progress.
Start before you pull your engine with pics of how your wires are
routed and hooked up, cables attached, hoses hooked up, vacuum lines
attached etc. The pictures on these pages are resized in
the interest of saving space but when you load all your
pics on the computer they will be quite large and you can zoom in
and see great detail which will be valuable while reinstalling and
hooking the engine back up. Also in the service manual in the
"Fuel" section there are some really good diagrams of the routing
of all the vacuum lines, and breather lines.
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I went to walmart
and got a cheap bath rug to put the engine on on the floor.
As you get to the point where you are ready to split the case you
will be rocking the engine over and resting the right valve cover
on the carpet. The carpet will protect the cover from scratches.
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This
is another good example of why you should take many many good pictures
with different angles and detail. This is the back of the engine
with the rear cover removed. Most of the gears in this shot
are to support the reverse system on your bike so if you have the
"Interstate" model you won't have all of this.
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| Not shown here but I highly recommend that after you pull your timing belts off and you do have to pull both at first, reinstall your right timing belt to protect your valves and pistons as you rotate your engine through with a socket and breaker bar during different steps of the job. (note that in this picture you are looking at the front of the engine so the left side of the picture is the right side of the engine) | ||||||||||||||||||||||||||||||||||||||||||||||
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This is
it. The epicenter of the beast. The point of no return.
When you get here
the healing process begins.
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