How often have you spent hours working to take apart a piece of machinery and walked away frustrated that the manual in no way shape or form was created by the person actually working on the object in question? Yes, this happens all the time unfortunately. Our Buell build left us hanging this past Saturday with utter frustration over the isolators on the swingarm. Our chain block was put into overtime lifting, descending, lifting, hanging, banging and cussing like there is no tomorrow in frustration over removing these damn isolators that dampen the vibration where the swingarm and motor mount connect to the frame on early Buell models.
When in doubt, search out the internet and type in a myriad of questions on how to fix what ya need. After a few queries we found several options and one amazing link lead us to the page of Daniel C. Starr and his ingenious tool. Below is a repost from Daniel's site and his home made custom tool for replacing the isolators. If only we could have found this before we started to tear right into the bike, doh!
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| Tube frame Buell islotator that is damaged and needs replacing |
"Tube-frame Buells use what are more or less the same rubber biscuit
"isolators" as the Harley touring bikes (no surprise there; Erik Buell
is said to have invented the system). And, from time to time, these
isolators wear out. The symptom I noticed was a lot of vibration through
the footpegs, especially when the bike was heavily loaded (i.e., with
gear for the week-long trip to Deals Gap I was about to depart on) and
hitting any kind of a dip in the road. And when they start failing,
riding is not an option--these things are chunks of rubber and metal
that are glued together and support the weight of the bike and rider in a
shear mode. When they start coming apart, there ain't nothing keeping
your ass off the pavement. The photo at right shows just how far my
right-side isolator had gone by the time I discovered it was failing.
The end plate (which nestles into the frame) had separated from the
rubber over close to half the isolator's circumference. Not at all a
good thing. I had to replace these puppies
right now. Here's how I did it.
On
some bikes (the Harleys, the S2 and earlier models, and the X1
Lightning), the rear isolators are held in place by a bolt-on plate that
lines them up and squeezes them into position. On these bikes,
replacing the suckers is easy. But on some models--S1 Lightning, S3/S3T
Thunderbolt, and M2 Cyclone), the isolators are slipped into recesses in
the frame before the engine and swingarm block are lifted in from
below. That is, there's no removable piece providing access.
The
shop manual says you're supposed to remove the engine from the frame to
change the rear isolators. Aiee! most customers say in response. So
various imaginative people have come up with schemes to free the rubber
biscuits without having to hang the frame from an engine hoist while
strapping the motor to a floor lift (and by the way, disconnecting every
oil hose and half the electrical wiring on the bike). We had some
motivation here.
Oh, and of course you may not be doing this
because the isolators have died; you may simply want to replace a worn
drive belt (especially if your belt was set up too tight by the selling
dealer, which many tube frame Buell belts were). That's what led me to
develop this scheme. Word to the wise:
if you're going to go to the effort (even the significantly reduced
effort under my scheme) to remove the isolators, you might as well
replace all the stuff that's replaceable here. In other words, if the
only thing "bad" appears to be the belt, replace the isolators at the
same time; if the isolators look bad and the belt looks OK, replace the
belt anyway. There's nothing worse than having to rip the bike apart a
year later because a belt or an isolator that looked OK the last time
you had the bike apart is now going south on you. How did I learn this?
Because I replaced the belt at 40,000 miles and didn't replace the
isolators while I had things apart, of course...
Also, keep in
mind that I'm not a Buell employee, and Buell didn't approve of this
procedure (or even look at it, far as I know). It worked for me, and it
was a lot easier than the procedure found in the manual--but remember
that 30 years ago some aircraft mechanics were saying the same thing
about using a fork lift to remove/install the engines on a DC-10, and we
all know how that turned out. I make no warranty that this procedure
will work for you. Be careful out there...
So, with that in mind, let's get started:
Step
1. Get the bike up in the air and remove the back wheel, hugger and
belt guards. Make sure you have plenty of room to move around beneath
its nether regions.
Step 2. Put a jack (preferably one with
wheels) under the transmission to support its weight, and then remove
the two big allen bolts that hold the isolators to the swingarm block.
These are 1/2" head allens. If you don't have an allen socket of that
size, Lafayette has a cheap substitute: buy a 2" long by 1/2" "coupler
nut" and stick it into a (six point) 1/2" socket. Voila! An Allen
substitute! Be careful removing the bolts; you don't want to mess up the
threads. In particular, make sure you've got the jack adjusted so that
the bolts aren't snagging on the isolator base plates as you take 'em
out. It's surprisingly easy to monge the threads.
Step 3.
Assemble the spreader tool shown below (Note--click on any of these
pictures to expand it). The center piece of the tool is about six inches
of 3/8" threaded rod from the hardware store. The pieces on it, from
left to right, are a 3" piece of stout tubing (I used a leftover Harley
Sportster turn-signal stalk, thereby keeping the whole thing an
"Authentic Harley Special Tool"), a regular 3/8 nut, a jammed-together
pair of 3/8" nuts (one of them's a locknut; it's inside the wrench and
the two are held together with Loctite. In the best of all possible
worlds, the central nut would be welded to the threaded rod), half of a
9/16" box wrench, and the other turn signal stalk.
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| Custom Buell isolator separator tool |
This is what it'll look like when it's assembled and ready to go:
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| 3/8ths threaded rod, jam nuts loctite together, 9/16th wrench, steel sheath = Buell isolator tool |
Step
4. Slither up under the rear end of the bike, taking a 1/2" and 9/16"
wrench and the tool you just fabricated with you. Remove the 9/16" bolt
that fastens the turnbuckle to the swingarm carrier (this allows the
engine and transmission to move side to side in the frame). Then remove
the 1/2" bolt that holds the battery ground strap to the swingarm
carrier. You'll find the hole goes all the way through the boss on the
swingarm carrier, and it's tapped all the way through. So re-install the
bolt from the left side, so that about 1/4" of it sticks out the right
side of the boss. This provides a pin for the left end of the special
tool to align on.
Step 5. Brace the cut-down 9/16" wrench part of
the tool against the top of the swingarm carrier, and turn the nuts
(fingers should be adequate) until the other end of the tool is pressed
up firmly against the inside of the frame just above the right isolator.
See the picture below:
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| Notice the red bar, need extra torque, use the handle of a your portable car jack |
Step 6. Then, as the picture above also shows, put a big long wrench on the
first nut (the one that presses up against the turn signal stalk on the
left end of the tool) and turn this nut to spread the tool out and shift
the engine/trans/swingarm carrier to the left. This is not actually
spreading the frame; it's just compressing the left isolator. You will
need to apply a lot of torque, which is why I put a long lever (a jack
handle, actually) on the wrench. The cut-down wrench that's a part of
the tool keeps the threaded rod from turning. Keep turning the wrench
and extending the tool until you can pop out the right isolator, as seen
below:
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| Buell isolator tool, used effectively to drop out the isolators for replacing |
Notice
how you've shifted the engine/trans/swingarm carrier about a quarter
inch to the left--you can see this in the misalignment between the
adjustment turnbuckle and the hole in the boss on the swingarm carrier.
This picture also clearly shows how the cut-down 9/16" wrench is braced
against the top of the swingarm carrier to keep the lock nut (and the
threaded rod) from turning.
Step 7. Turn the nuts on the tool the
other way (the cut-down box wrench part will flip around and brace
itself against the swingarm), until you can remove the tool.
Step
8. Give the swingarm a yank to the right, and the left isolator will
drop out. Now that you've got both isolators out of the way, this is a
real good time to run a thread-chaser tap down the holes in the swingarm
pivot. Remember that these pieces are assembled with heavy-duty red
Loctite at the factory, so there's going to be some residue in there
that could make it hard to get the bolts started when you re-assemble
this piece. So clean those threads up now!
Step 9. Slip the new
left isolator into place. Make sure it's aligned properly (see your
Buell service manual). Reinstall the special tool, and repeat step 5
until you've compressed the (new) left isolator enough to slip the new
right isolator into place. Make sure the belt's in the right place
before you install the new isolator; the last thing you want to do is
button up the job and discover the belt's dropped out! (Matter of fact,
given that you've got the isolators off, inspect the belt closely--if
it's even remotely near needing replacement, slip in a new one now.
You'll thank yourself later!)
Step 10. Repeat step 7 and remove
the special tool. You'll probably find the threads on the threaded rod
are a bit monged up by now, so you may need an extra wrench to keep the
rod from turning in strange ways.
Step 11. CAREFULLY start the
allen bolts through the isolators and into the swingarm pivot. This can
be tricky. You may have to fiddle with the jack a bit to align things
properly. Be patient; you don't want to mess up the threads. The last
time I did this, I found that the passage of time (and previous
removal/replacement of the bolts when I did a belt replacement two years
ago) had messed the threads up slightly. A quick cleanup with a 1/2"
SAE fine tap solved the problem, and everything went together nicely.
Don't forget the Loctite! Once both bolts are started, and you've again
checked that the isolators are in the correct alignment, tighten the
piss out of the bolts, to whatever monstrous amount of torque the manual
specifies (about four grunts, if I recall correctly).
Step 12.
Re-install the turnbuckle to the swingarm carrier. You may need to give
the swingarm a little shove one way or the other to get things lined up.
Re-install the ground strap (remember it bolts to the
right
side of the boss). Re-install belt guards, hugger, and back wheel.
Lower the bike, give everything one last check, and you're ready to go."
- Daniel C. Starr