Review on Cylinder Piston Gasket YFM660R 2001 2005 by Nathan Akers

Terrible! If you're on a budget because you want to ride before the snow falls, then this is the kit for you. Just do it as I will be restoring the engine over the winter. Also check and make sure the screws they give you are the same length as stock, if you haven't checked, pulled the strings out of the cases then you'll have to buy a $58 repair kit. Also take M6x1.0. Recut all 6mm holes in the cylinder as most of my holes weren't deep enough!