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Tusk Motorcycle Crankcase Splitter Tool

Tusk Motorcycle Crankcase Splitter Tool


– Hey guys, this is Justin
with Rocky Mountain ATV/MC and I wanna show you the
Tusk Crankcase Splitter. Alright, so if you need to get to the bottom end of your motorcycle, whether you’re messing with your crank, or you’ve got a gear that’s
gone out in your transmission, if you’ve gotta split the cases, you’ve gotta have a case splitter. And this Tusk Case
Splitter is gonna work on all your two-stroke and
four-stroke engines. And it works really easy, I
wanna show you how to use it and give you a couple tips on using it. So, the tool is really easy to use. Pretty much, these three ears
of the tool are adjustable. They’re going to mount to your crankcase and then, this center bolt is going to press against your crank and you’re going to pull
the case off the crank, is essentially how this thing works. Now, I wanna point out a couple
things when using this tool. First of all, the steel used
on this tool is extremely hard. You don’t want the steel to flex and you know, throw this bolt off and push on your crank funny, so that’s why this
material is really hard. With that said, there’s not gonna be a lot of give to this material, so if you misuse it, you
could actually break it or damage your motorcycle and you don’t wanna be doing that. So, let me show you how to use this. It’s really simple, you’re gonna set the tool over your crank. I’m gonna loosen the bolt up a little bit because I want the ears of this tool to fit either flush on my case or as close as possible. No matter what you do, you want the ears parallel to the case because you want the bolt on this tool to be pushing on the crank straight, you don’t want it to be
pushing crooked or anything. So, I’m gonna set this tool on and I’m going to pick
three mounting holes. In this case, this is a YZ250, I’m going to use three of the holes that hold the flywheel cover on and I want to space those out as evenly as I can. These three holes seem
to work pretty good, and I’m going to put my bolt in. Now, this tool comes
with two sets of bolts. One’s a six millimeter set and the other one’s an
eight millimeter set. And so, it just depends
on what your bike has and which holes are most accessible. This one’s all six millimeter, so I’m going to install the six
millimeter bolts in each ear and I wanna thread these
in as far as I can. You wanna grab as much of
the case threads as you can. Now, you’ll notice, these
are really long bolts. That’s just to make the
tool more adjustable for different applications. I’m gonna thread this in as far as I can and then I’m going to put the nut, thread the nut down on top
of the little ears here. So with the bolts in, and the tool centered over my crank, I’m gonna tighten these little nuts down. And make sure you have all
the bolts out of your case. We’re ready to split the cases now, but if you missed a bolt, you’re gonna have a really
hard time getting this apart and you’re probably gonna break something. So, with all the bolts out,
I’m ready to split the case. Alright, so I’m gonna use a 17
millimeter socket or wrench, put on the tool and I’m
going to start tightening it. Now, a lot of these cases,
like this Yamaha case, they don’t use a center gasket, they’re actually glued
together, pretty much. And so, the cases can stick pretty tight. You also have the bearing
on the crank sticking and even the bearing on your countershaft sticking a little bit. So, you know, when a bike’s been together for a long time, things stick together. You end up putting a lot of force on this and you need to be careful because if you put too much force, you know, you could maybe
throw your crank out of wack, but you could also break the tool. Like I said, this is really hard steel. It’s not gonna give much, it’s gonna break before it bends. So, one thing I like to do when I get pretty decent
amount of tension on there, I like to take a hammer, rubber mallet or hammer, and give this a tap, like so. I don’t wanna pound on
it and hurt anything, but if you give it a little tap like that, even on your countershaft, a tiny bit, it shocks the cases, shocks
the bearing a little bit, and kinda breaks things loose so you’re not putting a ton of
force on this crank splitter. So, as you can see, the cases
are starting to split apart but you’ll notice that
it’s splitting apart more in the front than the back, so something’s hanging
up in the back here. And we want this to come apart as evenly as possible, so we don’t wanna go too far
without that back coming out. So, something you can do, again, with a rubber mallet or a dead blow, kinda hit on the countershaft and then that worked. I’m kinda pulling up on the case. There’s a little tab back
here I’m pulling up on. That’s got me pretty even, sometimes you actually
have to take the dead blow and hit that little tab. There’s a dowel in here where
your swingarm bolt goes in, it kinda holds the case
together sometimes, so, you know, sometimes you just have to tap it apart a little bit, but the goal is to get the case, the cases to come apart evenly. Whatever you do when
you’re pulling these apart, you never wanna get a
screwdriver or anything and wedge it in between your
cases to break them apart. That’s going to ruin the
gasket sealing surface, so a dead blow’s nice and it usually just takes
little taps to get it apart. And that’s pretty much it. Once the cases are split, you can tell that the cases are apart because that tool’s
really easy to turn now, so I’m gonna go ahead and
take the tool back off. Now we can go ahead and pull
the two case halves apart. Course, I always watch for any washers that may be on in the bearings and the transmission. But anyway, that’s it. So, nice tool to have, it’s a must tool if you’re
gonna get inside your engine. Now, to get the crank out, I would just do the same process on the other side of the crank and push it out of the
case from the other side. Be sure and subscribe
to our YouTube channel. Check out the other videos we have there. I’ve got a video where we
totally do an engine tear-down, so you can check that out. If you wanna see more, be sure and check out our website for tools like this and others to help you maintain your
motorcycle, ATV, and UTV. Thanks for watching.

15 comments on “Tusk Motorcycle Crankcase Splitter Tool

  1. Awesome instruction and step by step commentary with cautions at critical moments.

    Great work, keep the videos coming!

  2. Cool tool. I need to split my casing on a YZ250h just to clean it out. The previous owner had already removed the piston but I found a spec of metal probably from the piston on the crank. I do not think I need to pull out the Transmission but just be able to get in there and clean out and inspect the gears.

  3. This is a great tool. It makes the job so much easier. Thanks for making a quality product at a reasonable price.

  4. Can you just use regular high heat silicone bond to mate the 2 halves again or would you need the "glue"you mentioned at: 3:48 ?

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