This is a video explain the differences between what is called A-Case and B-Case GY6 Engines. Some popular model numbers are 152QMI, 157QMJ and 161QMK and of the Taida 232cc (King of them all).....
In addition to explaining the differences of block, I detail how big each case can bored out.... I discuss short and long case A-Blocks and show video of the max tolerances and stock size case openings.
This is the perfect video for anyone that is considering a big bore kit but would like to know more about what fits what.
