- Hey what's up guys,
Dustin here with Rocky Mountain ATV MC.
Today I'll be showing you
how to replace the counter shaft seal on a dirt bike.
The counter shaft seal's what keeps the transmission oil
from leaking out of the transmission
through the counter shaft.
Now when it begins to leak,
you will definitely be able to notice it
as you will see transmission oil
in and around the area of the counter shaft sprocket.
Now they're really easy to change out
and today I'll be showing you how to service it
on a 2015 KTM300XCW.
To do this job we're just gonna need a few tools,
now keep in mind those tools may vary
depending on the bike that you're working on
but for today we'll be using some snap ring pliers,
we've got some open ended wrenches, a set of pliers,
a hammer and a socket that's about the same diameter
as our oil seal here.
Then we've got the K and L oil seal pullers
as well as the motion pro counter shaft seal puller.
We will be using the motion pro for today.
Then we've got the all balls counter shaft seal kit,
that's a replacement for the bike.
Now we do offer many other options at our website
so be sure to check that out.
Then we've got some rubber gloves, some grease,
contact cleaner, some rags and some safety glasses.
Now when it comes to working on your bike.
Always be sure to reference your service menu
for specific procedures, safety information
and torque specs.
To begin start by thoroughly spraying down
and cleaning the area of the counter shaft sprocket.
Next we can remove our counter shaft sprocket
by either removing your snap ring, center bolt or nut.
If you have a counter shaft nut, start by using a chisel,
punch and hammer to flatten the lock nut washer.
Put the bike into gear to help freeze the counter shaft,
while a buddy holds down the rear brake
so that you can remove the nut or bolt.
It may be difficult to remove the sprocket nut
but don't worry, this is totally normal.
Then we can begin to remove our sprocket
from the counter shaft.
Now depending on the type of the bike that you have,
you may have to remove the chain
or just create some more slack.
With the sprocket removed
be sure to clean the area of the counter shaft seal
and remove any dirt and mud or sand.
With the area of the counter shaft nice and clean,
we can take our channel lock pliers,
we can grab on to the sprocket spacer
and we can pull it off he counter shaft.
Now we can remove our counter shaft seal.
Now for this we're gonna be using our motion pro
counter shaft seal removal tool.
Now you can use a variety of other tools
but if you choose to do so,
be careful not to scratch the engine case
or the counter shaft.
Now to use this tool, we're gonna hold on to the body
of the seal remover, we're gonna take a 17 millimeter socket
and we're gonna rotate this like so
and this is going to spread or open the seal puller.
Once you've got that nice and snug,
we'll keep our 17 in a fixed position
and we'll take our 14 millimeter
and we'll begin to rotate it clockwise
and this will begin to press against the counter shaft
in turn removing the seal.
With the seal removed we can now remove the O ring
with our pick tool.
Then take a clean rag and carefully remove
any dirt or debris that may be trapped inside of here.
Be careful not to knock it into the bearing
or into the transmission's case.
I just wanna take a minute and talk about the O rings
that come in this replacement seal kit for this bike.
Now the kit will come with two different sizes of O rings.
So once you get yours removed,
you'll wanna match it up with an O ring that's the same size
and same diameter.
Now once you get that installed,
if it is still leak from the counter shaft,
you will want to swap it out for the other one.
Now keep in mind there are some bikes out there
that have two O rings on the counter shaft
so be sure to reference your service manual
for your bike's specifics.
Before we install our new O ring,
we're gonna take just a little bit of grease
and coat the O ring.
We're gonna slide it on to our counter shaft.
Next we can take our counter shaft seal,
we're gonna take a little bit of grease
and we're going to coat the lip of the seal evenly.
You can even take a small amount of grease
and just kinda coat the outside of the seal as well.
Then we're gonna place it on to our counter shaft here
like so.
Press it into place lightly, so it'll stay there,
then we can take our socket
that's about the same size in diameter as our seal
and we can begin to drive it into place.
Now when we drive the seal into place,
we wanna make sure that we drive it on evenly
and then we will set it
so that it is flush with the engine's case.
When driving the seal, take your time
and be careful with this step as to avoid damaging it.
Checks to see if it flush with your fingertips.
Before we install the sprocket spacer,
there's something I wanna point out real quick;
the side that's going to face in towards the engine
will have a lip to it, a slight recess.
This is going to compensate for our O ring.
Now the side that's gonna be facing outwards
will be nice, flat and flush.
Now before we install this,
we're going to take just a little bit of grease,
we're going to coat the outside of it.
Once the outer diameter has been coated,
we'll coat the area in which we'll mate with out O ring
just slightly as well as a little bit of grease
on the inner diameter as well.
Then we can take an place it under our counter shaft
with the recessed side facing the engine.
Once we get to the seal, we'll gently work it into place.
Wipe of any excess grease.
Then we can reinstall the sprocket onto the counter shaft.
Before installing your sprocket,
make sure to give it a good cleaning.
Next we can install our snap ring onto the counter shaft.
Now before we do that, we need to make sure that we have
enough clearance on the shaft
so that I can receive the snap ring.
Now if when you push on your sprocket
and your not able to get enough clearance
to see the ring landing for the snap ring
you may wanna switch over to the thinner O ring.
Once you get your snap ring set into place
you'll wanna double check
to make sure that it's fully seated in its ring landing.
So give it a good inspection.
Now if you're using a center bolt type or the nut type
that bolts on, you'll wanna use some medium strength
to high strength thread locker.
Now with the snap ring style,
just to give us some added assurance,
we're gonna take some silicone gasket and cover
the snap ring and the splines that protrude from it
just to ensure that it doesn't have a chance
of ever coming off especially in racing conditions.
Now if your counter shaft is a nut type,
make sure to reinstall the lock washer but inspect it
where it bends over to the nut.
Now if it's cracking or breaking, make sure to replace it.
Then we can install, the countershaft sprocket nut,
place the bike into first gear
and have someone hold the foot break
while we torque the sprocket nut to spec.
Next, bend the locking tabs over onto the lock nut.
And that's it, replacing the counter shaft seal is a breeze
especially when you have the right tools.
Now if you have any questions,
feel free to leave us a comment below
and we'll be sure to get an answer back to you
and subscribe to our Youtube channel
for more product spotlights, top fives and tests
and also see our website rockymountainatvmc.com.
Alright that's it for me, I'm Dustin with Rocky Mountain,
thanks for watching and keep turning those wrenches.