just buy the regular MHR Team 7T (31 12642) & use the hundreds of $'s you'll save & buy a decent crankshaft like the Malossi RHQ (53 8009) & other important stuff.
these cylinders can make 22hp at the wheel out of the box with just clever modifications to the intake, crankcase & the right pipe of course (Yasuni C21). the Tuned version can make 24hp but that's only achievable by only the best of tuners & that's with hundreds of hours of machining, preparation & fine tuning.
the MHR Team 7T is the best 70cc cylinder in the market only to be superceded by the Team 7T-T if you got what it takes to bring out the best from that cylinder.