Hello, John Talley here with partzilla.com.
Today I'm going to show you how to set the valve lash on a 2008 Yamaha R6 motor.
Pretty simple process, starts out by just pulling this upper cover, and then actually
taking measurements, adjusting the shims, and then putting it all back together.
So, if you're ready, let me go grab a couple of tools and I'll show you how to get it done.
Alright guys before we get started this is going to be a skill level two, so you're going
to need to pay attention, especially on your measurements.
Alright, what do you need to do this?
You need a decent set of angled feeler gauges.
I like to use angled because they're easier to get up under there.
Other than that, you're just going to need an 8mm socket and that'll complete your tool
list.
Alright when you're measuring make sure you measure twice and order once, because these
shims are quite expensive and it's going to be very disappointing if you go to order your
parts and then they don't check out in your final measurements.
So be very careful when you're going through that part.
So if you're ready, we'll get started.
Alright we've got everything cleaned back up, and now it's time to check the valve lash.
Or course I've already numbered everything, what we're going to do is each one of these,
we're going to pull out the shim.
We're going to write down each number as we go along.
Then once we get the cams mounted back in there with the caps holding it back down,
then we can measure and see if we need to add or subtract on that shim size.
So let me get all the shims back in, get the cams back in place, and then we'll start measuring.
Alright one thing that I need to note is that most of the time you'll be able to see the
number, but in the case of this second one I pulled off the number's been worn off.
so we need to do a quick measurement on it.
Alright next, let's go ahead and get our cams in.
In this position we can get both of these measured.
Alright when you're doing this, you want to kind of bring them down evenly because these
cams are very brittle.
The last thing I want to do is snap one of them.
The other thing you want to notice before I start cranking these down is I actually
have the head kind of spaced up here because as we tighten this down, of course some of
the valves are going to open and we wouldn't want to have to go into the table and potentially
bend a valve.
That would be a bad thing.
Alright guys, we've got it bolted back down and here's what we've got to do.
On the intake side, I like using millimeters so that needs to be between .12 and .19.
On the exhaust side, they're going to need to be between .16 and .23.
So, we'll start off at cylinder number one and then work our way across.
Keep in mind each time you go to a different cylinder you have to rotate your cams.
so I'm just using a tool like this to grab the gears and then turn them over.
So, if you've still got the head on the bike, then you just go down to the crankshaft and
move it the appropriate distance.
Alright, so let's get started.
Alright, that's a tick on the loose side.
As you're going along just write down each reading.
Alright, well I've got all the numbers written down as to what was in there, what we measured.
and then I just went and calculated the shim size that we should need to get them set correctly.
So, I'm going to pull them all back off, change out my shims, and then remeasure it and see
where we are.
Well alright guys, they are all set and ready to go.
So what happens next?
Well, you didn't have to pull the entire head just to do a valve adjustment like we did.
So, if you're motor is still in the frame, all you'd have to do is go on and get your
cams back in there, set your timing, and then put the valve cover back on.
If you would, reference our video on how to set the timing and I can walk you though that
step-by-step.
Now listen, I just want to tell you when you're making these measurements you want to measure
twice and and order the parts once.
So you want to make sure that you have it in the ballpark because the last thing you
want to have to do is order two or three more just to get it set right.
So that being said, when you're ready to order your parts, come find 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.
And until next time we just want to say thanks for watching.