A 144 top would bolt on there in the future.
This is not the case! The 144 has different center cases, crank and many other parts... I know... we looked it up!!

Mainly because we were thinking it would be great if you could change configurations from different race series having different displacement rules.
Honestly we were disappointed in that fact... although it shows that TM believes that the 144 deserves to have a stronger bottom end to ensure that the 144 is bullet proof!