Please reread your post and correct it if it's wrong. I assume you meant FRONT axle weighs 9k NOT the DRIVE axle..but you know what they say about assumptions.
That said, I adjust the weight on my front axle depending on the weight measurements when I have my rig weighed. Obviously four corner weights are optimal but not always convenient nor feasible. If you have a tag axle coach, raising and lowering the pressure on the tag, adjusts the weight placed on the drive and front axles. So, in answer to your question, yes, you can add weight to the front axle. Again, I assume you contacted Freightliner with your weights and told them you added the M/C lift. Their recommendation was 10500 on the front axle. If you add extra weight on the front, how would that play out if you don't take the M/C with you?....Dennis
