Hi, Just registered and this will be my first post to the site! Finally made the peap and decided to buy my first bike a vtr 250 however now im having some trouble with it. After I first purchased the bike it was starting and running fine no troubles started first time everytime I started it. Left bike for 2 days and came back tobstart it and couldn't. Starter was turning but thats it, I went out and bought a charger. Charged the bike and it started fine this continued for about 2 days before once again bike wouldn't start even with charging. Decided to bump start my bike for the first time by rolling it down a hill first attempt was unsuccsessfull second was succsessfull. However upon starting revs were extremely low sounding as well as having no response from the throttle after 5 - 10seconds the throttle responded however once i tried to let idle bike would die. However i was able to start the bike like normallish after this occurence. I rode it around a little but as soon as the revs got too low it would die (previous to this when this happened a few days earlier i simply ran the bike for 15mins then it would idle fine) i adjusted the idle so it was slightly higher and able to keep the bike idling fine. Later that night 3 - 4hrs laster i attempted to start the bike again same situation as earlier revs were low and throttle made no response for 5 - 10 seconds. After this 5 - 10 seconds the revs then fluctuated without any input to the throttle before settling back down to idle. Next morning once again bike wouldn't start despite charging. Left bike rest of that day. Today (Monday) I tried charging etc no luck, bike still turning over but not firing. Replaced battery with a better quality new one still no luck attempted to bump start after replacement of new battery 4 attempts rolling down hill got bike to 20km/hr and then tried. Each time Bike would fire with revs extremly low and no response from the throttle before simply dying. I have little experience with motorbikes but im not stupid and would like to attempt to fix the problem before having to take it to a mechanic. Any suggestions on what my next course of action should be. Additional info air filter is due for replacing, when bike was purchased not too long ago, carby was cleaned and spark plugs were replaced and oil changed. There was no debris or shavings in the oil when it was changed. After bump starting the bike for the forst time the other day upon statting and revving the engine the bike would periodically backfire. Cheers for the help in advance, id like to actually ride my bike seeing as it's my first bike and i haven't really had the chance to ride it!