Robert,
I have been using one on my Majestic. It is the 1.40RX 2-stroke pipe. If you have the room, I would suggest that one for your 1.40L. It will be quieter than the 4-stroke pipe. It weighs less than half of what the Hatori 1.40RX pipe weighs.

Wait, scratch that. The 1.40L pipe is again half the weight of my 2-stroke pipe. Go for the lightest one.

Mark