Whoa, steadt up there!
The MC21 should have a 150 as standard.
Can't remember where the fairing mounts - I think the right is to the bottom of the frame, but I've got a wooden spacer there to keep the plastic clear of the pipe.
Also not sure , but I think if you swap EVERYTHING for the 21 over it'll be ok. Not an expert here though, and you may find certain bits won't fit - like pickups and throttle position sensors.
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball