ah im sorry i should have read your post better bro! ,yeah any of those strokers will put you over the 200cc mark . so due ot the lack of being able to run more stroke and a larger bore diameter your best bet will be to make use of the blasters small stroke and bores natural ability to rev and create strong power but to make the bigger power it will do so at much higher rpms
in other words your going to have ot rob peter to pay paul id love to tell you that it would have stump pulling torque and still hit well over 9,000 rpms but thats not really how a 2 stroke engines powerband works ,i would do a 12 port stock port ,basicly a la sleeve sonic port layout in the oem stock jug .
takes me over 15 hours to port one so the price is alot higher but the mid -top will easily put you past any other 200cc engine .other additons that are required would be a large keihin carb ..atleast 35mm ,aftermarket carbon reeds(preferably delta vforce) and a rechambered race cut factory head for maximum torque at the target rpms and ignition timing drasticly advanced .