been putting my engine in the rs200 today but when i came to fit the front shafts they wouldn`t (just ) pop in

.
they go in about 1" but don`t seem to want to go in any further,they don`t seem to be master splined on the ends.
they should just push in shouldn`t they,i didn`t want to force it incase i broke something.
can anyone shed any light onto this please
cheers
dave