Hi, iv used to have mk1 b12 im now looking for another but are the differences between mk1 & mk2 so great i think i read somewhere that the motors were different if so what are the differences? Can the motor parts be swapped over ?What are the differences? Or are the mk1 b12 just a better all round bike. Thanks any info would be great id rather not bother looking at mk2 if its loads of work to get em like my old mk1 cheers locky.