I need a new chain for my 400ex. My rear sprocket is getting a bit worn too.

Found this on ebay?

HONDA 400EX 520 CHAIN 15 38 SPROCKET KIT 400 EX 99 - 04: eBay Motors (item 190447451911 end time Nov-20-10 10:45:06 PST)


should I get that?


Also I can remove the back part of the chain by loosening up the adjustment thing at the back by slipping it over the back sprocket. But will I be able to remove the chain off the front sprocket as well without breaking the chain?


And when you buy a new chain how do you close the master link? Are special tools required?

 

Skip the standard chain. You need an o-ring, x-ring, or something along those lines for durability if you ever ride in any kind of water/mud etc.

When replacing the chain/sprockets, you may have to remove a sprocket cover or whatever on the front, and the front should come right off. I usually loosen all the bolts for the rear wheel and sprocket before removing the chain. You will have to remove the wheel on that side to get the rear sprocket off most likely.

Buy the chain tool to install the masterlink. It isn't absolutely necessary(you could rig a small c-clamp for instance) but the tool is well worth the cost by making the job easier and less aggravating.

 

Also, any time you replace your chain you should replace both the front and rear
sprockets.
A worn sprocket will cause premature wear on your chain just as a worn chain will cause premature wear on your sprockets.
I have never used a special tool to get the master link clip on, I use pliers.
With an o-ring chain you will have some difficulty getting the master link all the way through enough to get the clip on. I use my chain breaker to push it all the way on.

 

Well I took it to the dealer and got aftermarket sprockets and chain. I got a TAG rear 40 tooth sprocket (38 tooth is stock) and a stock sized (15 tooth) front sprocket. I also got a z link renthal chain. Its feels a little bit faster with the larger sprocket. I like it. Paid $260 for everything installed.