Hopefully, 737 will respond with more info, but if it fits the 1G it ought to fit onto the 2G about the same. The important thing will be the length. The 2G uses a 20mm longer shock than the 1G. The Busa shock is 10mm longer than the 2G shock - therefore raises the tail of a 2G ~1.25". If the GSXR1K shock is the same length as the 1G shock, it will lower a 2G by ~2.5" at the tail light, which is too much for most street riders who aren't seriously inot drag racing.