Thank you, I was a little wrong. At high rpm generator produces about 12.8 (probably not enough). Also, very little is working starter. at 5,000 rpm you should see 14 volts.
I was interested in the open throttle rpm (on a cold engine) http://en.wikipedia.org/wiki/Throttle
max HP is around 6500 rpm, rev limiter cuts in at a bit over 8k rpm.