>>So from what you're saying, I can use the SBK engine cases too? not sure what you're tring to do, but if you're recasing a 900 then you can use 900, ST2, ST4, 851, 888 and S4. 748 and 916 will require swingarm modification due to the different pivot location and style. or a 916 swingarm if oyu feel like it. brad