Hey all, just started riding in April this year bought my first bike a 97 ninja250 for 800 bucks. 3,900 miles . When i met the guy he said it needs a little TLC and a carb cleaning well being a cheepskate i decided to lean myself real fast , got the proper tools and manual started going to work and ill say i did a great job the bike ran like new. Now fast forward to this past week in September ive done 3 oil changes this time i was strongly advised by other riders and fourms to switch to synthetic and go with 20/w50 for the hot humid weather which i did and everything seemed to run better smooth clutch etc etc .. However i noticed after 3 weeks or so my oil light would come on until fully warmed up even in 90 degree weather.. But all ran great . Now last night i didnt let my bike fully warm up just about 2 min and took off with the oil light still on but it went away after about 3 or 4 miles , i was riding in a 50mph zone which allows passing on my way to work almost running late i was stuck behind a old lady going about 20!! Needless to say i dropped gear an punched it to pass which I've always done but this time was different i think but i can't be sure i went from 2nd to first thinking i was in 3rd going to 2nd again im not sure but when I dropped gear to pass i went way over redline and all of a sudden i heard a bang which seemed to come from my right side maybe the gearbox? Not 100% sure my heart sunk after the bang i heard which can be described as little pebbles floating around in my exhaust im not sure where the noise was coming from i then hit the gear to go up one again not sure if i was now going into 2nd or 3rd but nothing was grabbing it was slipping i believe it woulndt or past 6k rpms in any gear i tried then i lost power the engine cut out and my back tire locked up and managed to get it on the side of the road.. 5 min later i started it up and it ran for about a half a mile again same pebble noise and the gears wernt holding it seemed .. Then out of no where I got a sure from the throttle And i flew picking up speed then it died again and now wont start when I try to start it sounds like a mild grinding noise hard to explain like maybe heavy scratching but wont even turn.. I drained the oil to find quite a bit of metal shaving and only about a quart of oil left i wasnt leaking could the oil have been burning up? Sorry or the long post but in so depressed as it is my first bike and currently my only form or transportation until the snow hits i hope its not a blown engine anyone someone any ideas? Thank you all !