onthethrottle.com - Two Clicks Out - Graves Yamaha Fork Cartridge Change

Two Clicks Out - Graves Yamaha Fork Cartridge Change

In this episode of Two Clicks Out, Catalyst Reaction's Dave Moss watches the Graves Yamaha crew change out front fork cartridges on Daytona Sportbike rider Josh Herrin's YZF-R6 at the Yamaha Factory team test at Auto Club Speedway. This episode of Two Clicks Out is brought to you by www.SportBikeWrench.com...Performance Parts, Professional Advice.

Comments

UrBiggestFan

|Registered |2010-01-21 11:37:53

Great commentary Dave,

You got me thinking... like you said by removing the
lower cartridge bolt on some forks(like mine) the oil will leak out, is it safe
to say that I could change the oil that way without having to remove the forks
from the bike? Is it harder to set the oil level?

I'm waiting for your DVD...
=]

JLUnlimited - Learned

|Registered |2010-01-21 15:52:26

From my short time being under a bike or two, if you have to remove or change
the oil it is best to get all of the parts out to clean them and change some
things you may not think is worn(seals and such). So to do the job right I would
say take the extra two minutes and take out everything, it's worth the work. .

I am glad that I have a Yamaha right now ! !

Dave Moss - UrBiggestFan

|Registered |2010-01-23 21:03:38

Thanks for the comment regarding fork oil change and in answer to your question,
yes you can do it that way but it is very messy and really hard to get the oil
out of the inner cartridge as you end up bashing it against the bottom of the
fork leg each time you push on it.

The R6 fork is very unique in this regard,
allowing this to happen.

All other forks require the forks to be removed to
change the oil correctly. Look for some up coming video's on precisely that
topic in the ext couple of weeks!

Dave Moss
Host

Dave Moss - JLUnlimited

|Registered |2010-01-23 21:08:29

For the amount of time it takes to clean everything including seals, pistons and
valving shims, it is worth the extra time. You will need an hour or so at least,
maybe two for the first go through but with practice that time will
decrease.

Why be that thorough?

The fork spring scrapes constantly inside
the fork as it compresses and releases. This creates a very thick paste that
coats everything much like the gel coat on the body of a fish. Given enough time
it can block piston ports and corrupt valving shim performance by getting
between them.

That's why fork oil has be changed far more often than shock
oil.

Dave Moss
Host

UrBiggestFan

|Registered |2010-01-24 12:10:49

Thank You Mr.Moss,
It's impossible for me to get this much information from a
Professional. The shops where I live, deal only with ATVs and snow machines. I
don't trust anyone with my track bike, so your videos and comments are
invaluable for me. =]

JLUnlimited - Jordan -Dave Moss

|Registered |2010-01-26 15:28:12

I was just answering that question that was presented. Don't mean to step on any
toes ! !

I have seen guys try to change the oil with out cleaning out the
forks and seals and other things have failed, hence why I commented on going the
extra mile to clean out and inspect everything.

I know from experience and
I have been able to get it done in good time, even with changing fork seals. but
I don't do shortcuts. . LOL ! !

Your admirer
Jordan

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