I have a 94 xr200r hybrid and I'm almost 100% complete. Just waiting for the front and rear fender to come in. I hope to be riding it on Friday. My qustion is on jetting. It has been bored .040 over and has a new wiesco piston. I'm running a 2 stroke KX250 silencer. When I back off the gas, it shoots small flames out the silencer. I took the carb off to see what jets were in there. They are 35 slow jet and 98 main. I was suprised they were so small. I blew out the jets and then tried to use a welding tip cleaner ( wire) to run through the slow jet. I could see a little light through the jet but not much. I couldn't get the wire to go through the jet. It seemed like there was a "filter" or something in it that was very hard. I tried to work a small drill through it to pull out what might be in there but couldn't get that through either. I could still blow air through it both ways. It just doesn't seem right. I ride at elevations from 350' to 1000' in NC and VA. I was planning on going to a 38 and a 112. Any suggestions? Also, with the 2 stroke silencer am I hurting the engine without the back pressue of a 4 stroke muffler?