On the Vulcan V1200 the Brembo PS12 rear brake master cylinder drives into a Nissin (Triumph) slave cylinder/caliper.
The rear brake lever travel with this pairing is too great.
If I were to change from PS12 to PS15 more brake fluid would be pumped for the same amount of piston travel and therefore reduce lever travel.
Does this make sense? Its an expensive experimant so appreciate expert views before committing.
DWS
Dave,
Based on my experience most Triumph's with Nissin rear callipers such as the 955i and 1050 Tiger etc use the Nissin rear master cylinder with a 14mm piston. The thickness of the disc and pad material is also critical.
You may wish to try a second-hand Nissin Triumph 14mm master cylinder with remote reservoir before investing in a PS15 as I believe the Nissin plunger piston stroke is also longer.