Hello fellow riders! So i got a serious problem on my hand with my beautiful 1995 KTM RXC 620 that i love to ride! So i will tell you from start to end on the information on what i got right now but i need some direction from some wise people being only i am 17 and my father doesn't really want anything to do with the ktm at the moment. I am very mechanical inclined so i can do most engine easy-moderate repair. Ok so now onto the description, my bike just idles but will not accelerate. Now before this happened i was doing some sandy hill climbs with friends on a cool summer day, my bike ran great and never shown any signs of this problem. Towards the end of the hill climb day i stopped to rest for a few minutes on a sand hill with my bike facing towards downhill, i go to start it and it make this sound like something fell into the engine but went away after a few quick seconds so i was like oh crap and just had my friend trailer it home for me. I get it started the next day and it runs fine but here is the scoop towards the end of the day for the road riding the bike would no longer accelerate like a 650cc would but like a little 110cc, like i had to give it full throttle to get off from stop lights. I made it home but by that time it really was running horribly to the point where if i gave it gas it would just shut off. So far the thing i have done to the bike is replace the plugs, cleaned the carburetor, and petcock but no absolute change at all. Also 2 weeks before the hill climbs we had to pull the magneto cover off to replace some oil lines but i moved the magneto back to is original spot and made sure it was in it's original spot, I made a note that it didn't drive any different and was normal as i was riding around town for those 2 weeks after the oil lines and magneto cover were taken off. Only after the hill climbs it started running like crap. I don't even know where to start on fixing it but i am so close to just taking it to the ktm dealership about 120 miles away to have them look at it and fix the problem but i am trying to save money. Thanks to any wise people that answer this to help, i am just lost at the moment and i need to get my hands back on this project so i can ride as spring is approaching and our gas prices are going up :). Good gas mileage for a enduro bike though! Thanks Adventure Riders!