the past few days my bike has been giving me a bunch of trouble starting, and the chains gets tight and loose, chain will be how it should sit normal, and if you roll the bike forward the chain tightens rite up. this chain is only a week old. i spin the rear tire with out the chain on there and everything appears to look normal and good. the shaft coming out of the motor looks feels fine, only thing i noticed is i pulled the cover off that is behind the front sprorket and there was a small amount of oil on it. could this seal be bad? and the shaft is almost "free floating? in there? second the starting issue it would always start first kick when cold, now this has happened twice now in the past 3 days the kick starter you can not kick the bike over. then once you get it to move the bike wont start, kick and kick and kick, and gas will just keep pouring out of the carb. i have also checked the oil and there is no signs of metal. drained it and checked it. any input would be great. i am going to really go over things in the morning. thanks.