How to adjust chain on 07 Yfz450???

Heckler05 · 06-02-2008, 12:38 AM

Hi Guys,

just bought a 07 YFZ450, and wanted to know- how do you adjust the chain slack...

loosen the the (4) bolts and then what is next..... (any pictures)

tried the search- no luck on 07 models

**Hefe** · 06-02-2008, 11:26 AM

stick a punch or some sort of screwdriver type thing in that hole on the left side of the carrier (when facing the rear) and roll the bike, the chain sprocket will adjust the accentric (sp) in the carrier, and tighten or loosen the chain

jumpingjack · 06-23-2008, 12:06 PM

From the "YFZ450 Owners Manual":

**JayDawg** · 06-30-2008, 08:53 PM

How do you adjust the chain on an 05' YFZ with the other rear swingarm?

**Hefe** · 07-02-2008, 10:56 AM

what "other" swingarm Jay?
the stock 05?

**JayDawg** · 07-02-2008, 11:55 AM

Yes, the stock 05' swingarm. I said other because it is a different swingarm from the 06''s and on.

**Hefe** · 07-02-2008, 12:14 PM

loosen the 2 big bolts that go thru the carrier, and turn the little ones till the chain tightens up, the 04-05 were pretty easy to figgure out.. just stare at it for a minute... super easy!

**JayDawg** · 07-03-2008, 12:09 AM

Cool thanks Hefe! I read somewhere you had to match up some marks but I didn't see any and that is why I was a little confused!

**Hefe** · 07-03-2008, 09:45 AM

the marks are there for you to keep your axle straight

**JayDawg** · 07-03-2008, 12:00 PM

Where are they at? I don't see any marks on mine.

**leveldrummer** · 07-10-2008, 11:50 PM

Quote: Originally Posted by JayDawg

Where are they at? I don't see any marks on mine.

they are right on top of the swingarm, next to the sprocket and brake caliper, looks like a little arrow, and a few lines, if you just count the turns on the screws that tighten your chain, and turn each one equally, you should be fine.

**JayDawg** · 07-15-2008, 02:51 PM

Quote: Originally Posted by leveldrummer

they are right on top of the swingarm, next to the sprocket and brake caliper, looks like a little arrow, and a few lines, if you just count the turns on the screws that tighten your chain, and turn each one equally, you should be fine.

Thanks for the reply, I just found them. I will probably adjust my chain in the next day or two. Do you need the YFZ jacked up where the wheels are not touching the ground when you do this or is it okay to adjust the chain with the wheels on the ground?

**leveldrummer** · 07-16-2008, 12:40 PM

its ok to adjust with them on the ground, but do it sooner rather than putting it off, a loose chain can cause some serious money if it snaps or binds, one of the simplest things to check and maintain, and most people wont. if it break, you can easily bust up your left case, end up costing a TON of money to fix, and it only takes 10 minutes tops to adjust and oil. and replace it when its worn, you dont want to break a chain!

**JayDawg** · 07-16-2008, 01:40 PM

Stupid question but how do you know when your chain is worn out? The chain on my YFZ is the stock one from when I bought it new almost 4 years ago. The YFZ has maybe 30 hours on it.

**leveldrummer** · 07-16-2008, 02:16 PM

i usually look for signs of wear around the pins where it slides on the sprockets, the outer edge of mine gets worn pretty good where it slides down my skid plate too, if it seems rusted,there are o rings in between each link too, make sure those look good and not all cut to hell.

**JayDawg** · 07-24-2008, 02:59 PM

Quote: Originally Posted by leveldrummer

they are right on top of the swingarm, next to the sprocket and brake caliper, looks like a little arrow, and a few lines, if you just count the turns on the screws that tighten your chain, and turn each one equally, you should be fine.

Hey all, I am tightening my chain right now but am having nothing but problems. I loosened the two bigger bolts and then began turning the two smaller bolts. All it does is screw all the way to the bigger bolts and that is it. Nothing adjusts. What am I doing wrong?

**JayDawg** · 07-24-2008, 03:58 PM

Nevermind, I got it done. I didn't see the 17mm bolt that I had to loosen that was behind the brake caliper. Once I loosened it, it was a piece of cake to do. I don't know why a lot of people said it was a difficult job to do? That 17mm bolt was a pain in the butt though. That thing was on there freakin tight! I tightened it down as tight as I could it return but man I was amazed at how tight it was on there from the factory. I had to use a cheater bar in my ratchet to loosen it.