When I have generated an RD track I usually have to go to Edit/Audio effects/gain change to change to 100% level, any other way to make it 100% ? The same problem goes for my guitar tracks. Even if I record up to clip level the track is low level and I have to normalise each track afterwards ????? By the way I'm using M-audio firewire 410!

Some realdrums (many) are low in level. You've found one way to handle it.

I don't have that problem with recorded tracks, so I would guess you have the monitor in the M-Audio clipping, but the send to RB is down a bit. I'm not familiar with the firewire mixer, but in a lot of M-Audio mixers there is a lot of flexibility in the routing.
Is the VU in the M-Audio showing strong during record, or in RB?

I adjust my input level some 3-6 dB below clip indication! I have adjusted M-audio software mixer to max output (all faders at top) so I guess it must be the data out (firewire) that isn't able to deliver an adequate input to RB?

What does RB input meter show? That will answer the question.

When my input level is adjusted to occasional clip and I strum hard, the RB VU-meters are near 0 dB, so I guess that the reason is that I adjust my input level low to ensure a clean unclipped recording, I realise also that my headphone level is too low but that's another cup of tea :-)

right click the volume fader in tracks view and add to the DB level of the track