rs engines

was wondering if an engine out of an m reg rs would fit in say one from 98-05

thanks in advance

 

assuming you mena 50s not 125s or 250s then yes, i beleive all rs' up to 2005 were the minarelli AM6 lump. after this they used the derbi engine.

 

i meant the 125

 

rotax 122 or 123, both the same mounts (i beleive). should all fit each other but parts arent that interchangable.

 

think slightly diff mounts but like fuck all in it worth worrying about. only say that because it's easier to fit the 257 into 123 bikes and the frames are the same so it hints at diff mounts. it will fit though so no worries