Thread: dirt bike rebuild, are there any tell tail signs when its needed?

about 6 months ago i bought a yzf450 for trail rides and general mucking around, i was told it was rebuild by the previous owner and he had put 10 hours on it since then, now i v put about 25-30 hours onto it an i was starting to wonder if there were any tell tail signs that another rebuild is needed. if the previous owner was telling the truth it wont need one for a while now but i dont trust what anyone says unless they have written proof. i do ride it hard sometimes, change oil every 5-8 hours. iv noticed it getting pretty rattly at times but i also know yz's are notorious for being noisy as.

if anyone has any idea that could help me it would be appreciated. cheers