Balanced internals, lightened flywheel and a decent sized cam means never having to short-shift. Wound mine to 6k today and that seems right. I set the rev limiter to 6400 just to be safe.
PS @DannyP the 2.0 flat 6 is very comparable on paper to my 1.9 Type 1. It's five horses and six ft-lbs more, both at just a couple-three hundred RPM higher.
Porsche 911T and 914’s 2.0 liter (1991cc) flat 6: 125hp @5800; 131 ft-lbs at 4200.