I replaced all mine on both bikes with stainless 1/4-20 x 3/4 allen head bolts, I hate torx.

 

Here's my torx story, went to change the fluid tonight and thought it would be a simple job. The screws were so tight that the T27 broke, I had another one and it broke also ( first one Snap on second one Matco ) I ended up taking the primary off and drilling out the fu*&^ng torx. A trip to the dealer for a gasket and allen bolts in the morn. Nothing like a simple job taking forever. The dealer did the 1000 mile change so they put them in to tight or they didnt change it back then.