Hello all, I just picked up a 2006 yz450f the other day for $2100 which is cheap in my opinion but it needs some things. My last crf450r I believe had a sight glass for checking oil level. This bike doesnt and has just a fill plug with no dipstick so in my thinking there is no way to check the level aside from knowing how much you pour in when you change it. The reason I ask is because I noticed the bike having a good amount of oil come out from either the front sprocket or shifter lever and I wanted to make sure it wasnt ran dry. Its hard to tell until I tear into it where the leak is coming from. So my question is should the bike have a dipstick on the oil fill plug? And also is it pretty straight forward replacing the seals at the front sprocket area and/or the shifter lever? Thanks in advance!