To remove if no two or four pin notches for a removal tool:
"remove the cover, clockwise!
let the bearings fall out all over the floor.
clamp the remaining guts in a vice and undo, or rather find the vice wont grip it nicely and begin to grind two opposite flats on, till a vice will grip and undo it.
finally learn from the mistake and only ever fit a freewheel......."
The one in your picture looks similar to the LMA-2:
http://www.dicta.com.tw/samp_all.htm
To remove if no two or four pin notches for a removal tool:
"remove the cover, clockwise!
let the bearings fall out all over the floor.
clamp the remaining guts in a vice and undo, or rather find the vice wont grip it nicely and begin to grind two opposite flats on, till a vice will grip and undo it.
finally learn from the mistake and only ever fit a freewheel......."
http://www.singletrackworld.com/forum/topic/cheap-dicta-freewheel-removal
[ame="http://forums.mtbr.com/showthread.php?t=483812"]Freewheel removal problem - Mountain Bike Forums[/ame]