The past two rides i have been having issues with my bike. After the first of the two rides while changing my oil filter during an oil change found pieces of what looked like dirt. and some metal pieces. Im usually really good with changing my oil, change it after every other ride. During the second ride the bike started to sputter and felt bogged down as i was riding so i went back and dabbed off any excess oil on my air filter. it seemed to improve it a bit but it still did it every now and again. Basically as im riding the exhause pops and cracks when i let off the throddle.It def doesnt sound normal to me anyway. Along with that as im riding im noticing it hesitates and sputters at times wile going through the gear im in.. I was told it could be tooo much oil on the air filter? And the dirt or metal shavings im finding could be my clutch basket. Plese help me with my situation i am dreading it being something huge and expensive. Thank you!