Main Motorcycle: 2012 T100 Cranberry/cream
Join Date: Jun 2012
Location: Crown Point, IN USA
Other Motorcycle: 2008 V-Strom 650
I've used Rotella T6 in several bikes, including my 2012 T100. I've not noticed any issues with shifting in any of the bikes, including Honda VTX 1800, Shadow Sabre 1100, V-Strom, Kawasaki ER-6n.
This oil seems to be the oil of choice at the V-Strom forum.
Could there be something specific about Triumphs that doesn't agree with Rotella T6? I put just over 2000 miles on my 2012 T100, with about 1500 using the Rotella T6. As I mentioned, shifting seems to be very smooth.