The 161qml and 161qmk are both K-blocks and are both 170cc. The 61 in the engine code means 61mm bore aka 170cc. I see you didn't bother reading my post above lol. Neither are B-blocks and neither are 232cc. Idk where you got your information from but that is horribly wrong. The B-block is a...
1st thing....These 150-"200cc" motors are called gy6s.
2nd.....There is no such thing as a factory 200cc gy6. Most buggys being labled as "200cc" are 170cc "161qmk" aka K-block or 180cc "1p63qml" with some 150cc even being labeled as 200cc. 161qmk and 161 qml are both 61mm bore and both...