I've been modifying a bike list for tournaments later this month. I have gone through a few builds, and this one has done decently for me. Sometimes I replace Kor'sarro with a captain on bike with relic blade and stormshield.
Kor'sarro Khan - 205
Moondrakkan
Command Squad -200
2 powerfists
2 lightning claws
stormshields
veteran sergant
10 Sniper scouts - 170
camo cloaks
8 bikes - 285
attack bike
powerfist
2x melta-gun
multimelta (on attack bike)
8 bikes - 275
attack bike (heavy bolter)
power weapon
2 plasma guns
Predator - 250
3x Lass
extra armour
Chronus
Thunferfire cannon -100
5 assault terminators - 200
Dreadnought - 120
extra armour
Drop pod - 35