The motovert 125r because its an actual brand name bike, the MSO is just another BSE which is good but motovert is quite alot better. And will probably last a fair bit longer.
akim21 not sure where did you got that idea from man? if you try to trash a good brand you ought do better than that. I know the factory owner myself, matter of fact Mojo did import some of their lower range of bikes from BSE ages ago. Still The brand also help quite a few stores out there to import the BSE bike, but as far as I am concern the 125 is from the factory where mojo produce it's Expert from. Next time try to be more specific or at least responsible for what you saying.
You can tell its not BSE, it doesnt have those BSE parts.
And in ADB's pitbike shootout they had the motovert, they didnt include other bikes like MSO and Pitpro because they are both BSE, they would have done BSE in general maybe..