Why aim to buy a motard ready bike? That's silliness and just limits your options... I just bought a Nitrous 150 which I'm doing up to motard. I'll have spent a little less than $1,500 by the time I'm finished and more or less the only thing I'll be leaving stock (except for oil tuning) is the forks. If I sell off the gear I remove I could almost have some decent forks on it for ~$1,600!
You could spend less than me too, I've bought some stuff that I'm pretty sure I won't need and you could probably get some cheaper stuff than me that will do just as good a job
That leaves you with ~$1,000 for decent gear, If you buy a dirt helmet + goggles for ~$200 then you have ~$800 to buy a race suit, boots and gloves. That will get you some decent kit to go with your decent little beast
Work the engine once you can push the YX150 to its limit...
My build thread is coming. I just got word most my parts have landed so I'm starting soon
Looks like I need to get my hands on the either YX150 or Daytona 150. $2.5k is solely for the bike as due to my years in riding sport bikes I have loads of leather suits & helmets already. I just want to get into mini motard racing as I can't afford to race full size motocycles.