Thoughts on high ST and LT Trim vales on Motorbikes?

I have been advised that it is normal to see trim values up in the 60% and even 80% range at idle in our Triumph injected twin engines and especially the 270 degree crank variants.

I have noticed that it is more at idle that this level of trim is used rather than off idle.

The bikes seem to run and perform well despite the trim values, i just cant think of a reason why a twin configuration would require such high trim values opposed to a std triple or 4cyl?