This bike NEEDS a rear mudguard of some sort, am sorry to report. Took her out today (another 80 run-in miles @ exactly 0°C to a streneous YTD total of 195 or 313 kilometers) amidst dead leaves and melting snow flakes. Most of that wet road grime ended-up around the rear shock, under the seat and the license plate, and, whatever of it that was left, copiously SPRAYED all over my jacket's back.
I have just placed an emergency order for Triumph's carbon fiber mini guard

Jamie