Motorcycle transformers all seem to have size changing because they always grow to at least twice as big as what they could feasibly be from when they were in vehicle mode.

That's a R.A.M. Motorcycle from G.I. Joe!!! The stickers are exactly the same!!!

NegativeSoul said:

Motorcycle transformers all seem to have size changing because they always grow to at least twice as big as what they could feasibly be from when they were in vehicle mode.

If motorcycles didn't size change, most of them would be minicons.