chain tension

[jslayer]

i just bought a 400ex.it's a new 2004 . i have about 3 or 4 hours on it. this is my first chain driven bike
i'm pretty sure there is way to much slack in my chain.
how do i adjst it properly. i see 4 allen head screws on the back swing arm. but have not attempted anything yet.:confused:

[LTandRaptorider]

loosen those 4 bolts, on the left side of the carrier, you'll see holes to put the chain adjustment tool in. It's a short rod, I assume one came with the quad? Anywho... using that tool to rotate the carrier to tighten the chain. You should have about 1.5-2 inches of chain deflection. Then tighten those 4 bolts up.

[TC426EX]

If he just got the quad and it has the stock carrier, then he will need a big flathead screwdriver and not the little adjustment rod like you need with the Lone Star's and aftermarket carriers. Make sure you leave some sag/slack in there because if you dont youll roast the chain and sprocket 3 times as fast... Make sure you keep some slack in there ESPECIALLY if you are jumping. Youll want to set the sag with you sitting on the bike...

[warrior369]

read the owners manual, there are pictures with directions

[ZapsRacing]

A rule for chain adjustment on dirtbikes is a '3 finger rule'. that would end up being 11/2"-2" like LTandRaptorrider said. Keep an eye on that. It is a VERY important component. To tight and ya can bust ur chain when ya bottom out. To loose and ya will wear out ur chain/sprockets from the chain snappin really fast from alot of slack to being in motion.