Oh man...
ADD a bolt pistol frag grenades and terminator honour to this model.
Remove furious charge form these dudes, give the sgt a powerfist.
Same as above.
use your bikes more as a side force, instead of your main assault.
Add a plsama gun. keep the squad 6 man though.
Same as above.
Change your traits and add furious charge to these dudes.
Add 2 plasma pistols to the squad members.
Good.
Remove 2 marines fromt his squad. Currently the point are incorrect, it would be 230 like this. Remove 2 and make the squad 8 man. for 200 points.
--------------------------------------------------------------------------------------------------------
Bikes are a difficult selection to use.
You will run out of fast attack choices if you dont take be swift as the wind, so you should take the drawback Apsire to glory. Currently this wont effect anything in your list.
Good Luck.