Hello, John Talley here with Partzilla.com.
Today I'm going to show you how to replace the rear brake pads on our 2009 Yamaha YFZ450R.
Really simple to do, let me go grab a couple of tools and I'll walk you through it.
This is a very simple procedure, so it barely rates at a skill level one.
Let's go over some of the tools that you're going to need to pull this off.
On the socket side, just a 14mm.
then you're going to need a 5mm Allen, 3/8ths extension, 12mm wrench, flat-blade screwdriver,
3/8ths ratchet, and as always, a good torque wrench.
Now if you would watch the video all the way through, because I'm going to give you the
torque values that you're going to need to set each nut and bolt for.
Now, as far as the parts go, if you would, reference our parts diagrams.
That's going to tell you exactly what you need and get it ordered so we can go over
there and I can show you how to get it done.
Alright, lets' start by loosening up the pins that actually go through the caliper and the
brake pads.
Don't remove them all the way, just go ahead and back them out.
With that done, we can remove two 14mm bolts that actually go through the bracket and attach
the caliper to the rear carrier.
I know from looking at these pads, there's still a good bit of meat on them left but
I don't like to wear them all the way down for two reasons.
One, when they're really worn down they don't dissipate the heat as well, and secondly that
causes them not to grab and if you let them go all the way down, then you run the risk
of damaging your rotor.
I don't think you want to do that.
Alright now we can just lift the caliper assembly off, rotate it up.
We want to go ahead at this point compress the pistons back inside of the bores on the
caliper.
But before we do that, go ahead and loosen up your locking bolt on your parking brake.
give it just a couple of turns out so if somebody else had adjusted it, if you don't go ahead
and back it out a little bit you won't be able to get the new pads in there.
so, at this point we want to go ahead and get the flat-blade screwdriver and compress
the piston back inside of the caliper.
That way it'll give us room to get the new brake pads in there.
I just put it in there and twist.
Hold it for a few seconds, you can feel it give.
I do one piston, then the second, then go in the middle just to make sure that they're
compressed all the way.
now with that done, we can go ahead and remove the pins.
You may want to push in on the pads because they're actually just a couple of pieces of
metal under here that act like springs to hold them up.
Push in on them just a tick, and the pins will pull right out.
There we go.
Now, they just lift out.
Alright, now would be a good time just to grab a small bristle brush and at least get
any dirt that has accumulated up in there.
Now, we just need to put it all back together.
Take the new pads, push them down in place.
Alright I've got the pads in place, but what I want to do before I put the pins in is clean
these up a bit just to get the dirt off, so, I'll be right back.
Alright, now with our pins cleaned up, we can push down on the pads against that spring
and just insert them through, but don't tighten them down yet.
Now carefully make sure you've got enough of a gap in between the two pads to get it
over the rotor.
And go ahead and put our bracket bolts back in.
Now we need to set the torque to 31 foot pounds.
Next, take just a little bit of threadlocker and put it on the threads of the pins.
And then we're going to torque those to 12 foot pounds.
Alright the next thing we need to do is actually set the length of the parking brake.
And the way you do that, we've still got this bolt a little a little bit loose, and we're
going to go in and we're going to measure in between this edge right here and the center
of where the cable goes through that control arm.
What we're looking for is about 1.9 inches.
So actually she's a little bit too much, it's sitting at two.
I want to shorten it to about 1 and 7/8ths.
That should get us in the ball park.
And where I adjust it is actually up toward the middle of the machine so we need to move
there and adjust the cable to where it brings it in a little bit more.
Alright, here's where we're going to adjust it.
So we need to break loose that lock bolt right there.
And then we're gonna turn this to bring out that adjustment.
No remember we don't have to go very far, about an eighth of an inch is all we're looking
for right there to get in in spec.
Let's see where that ended up.
Close.
Just a little bit more.
Let's see where that ended up.
That's got it right at 1 and 7/8ths, and I'm happy with that.
So, let's go lock that one back down.
That should hold it.
Alright, now, what we want to do is take this bolt and run it in carefully until it bottoms
out, and then back it up an eighth of a turn.
Alright it bottomed, now we back it up an eighth.
We're gonna hold it still and then tighten up this pinch bolt.
Alright, with that in place, it should move right now-- which it does-- pull that parking
brake?
It's got it.
Well alright guys, that wraps this one up.
Well listen, if you need any parts for your machine why don't you come see us at Partzilla.com
and we can get you taken care of.
If you have any questions or comments, leave them in the section below and I'll do my best
to answer them.
Til next time we just want to say thanks for shopping with us here at Partzilla.com and
we will see you in the next video.
Have a great day.