Default values are for a 1996/7/8 or 1999 XR400R.
The XR400R RPM range
is up to 9,200 RPM before the rev limiter cuts in - need to double check that?
Realistic dyno runs show 8 to 8,300 as being the max working RPM, unless
engine work is carried out to obtain more revs.
Wheel diameter can vary
subject to tyre choice. Measure roll circ and use C=Pi times D to calculate,
where Pi is 22/7
HRC kit Primary Gears are 24/64 or 2.666 to 1
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plus the control key.
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