1) I'd check that the chainline actually is straight before doing anything else. Measure it with a ruler. Sheldon Brown's has more info: http://sheldonbrown.com/chainline.html
2) How's your chain tension? About 1/2 inch of vertical play
3) Lubed up properly?
4) Is the wheel straight in the dropouts? Cog could be at an angle.
5) If you can't get the chain tension even, take off the chain ring, check it's flat on a flat surface. Bend it carefully if it isn't. Put it back on again. If it's still binding, i.e. tight in places, loosen chainring bolts, tighten them up evenly again.
1) I'd check that the chainline actually is straight before doing anything else. Measure it with a ruler. Sheldon Brown's has more info: http://sheldonbrown.com/chainline.html
2) How's your chain tension? About 1/2 inch of vertical play
3) Lubed up properly?
4) Is the wheel straight in the dropouts? Cog could be at an angle.
5) If you can't get the chain tension even, take off the chain ring, check it's flat on a flat surface. Bend it carefully if it isn't. Put it back on again. If it's still binding, i.e. tight in places, loosen chainring bolts, tighten them up evenly again.