Hey im a new member with a 1996 RM 125. It runs great, starts on the first kick, and is a blast. Two concerns. The previous owner told me to only run it 50:1 (gas/oil mixture) but didnt give a reason why (i cannot get ahold of him anymore). Now i am no mechanic but i was under the impression that 32:1 is standard mixture which is also what the service manual says to run. Could he be running a bigger piston or something? So my first question is what engine mods or changes would make someone want to run a bike 50:1 instead of the suggested amount? My second question. Grease/oil, a deffinite mixture of both, is coming out of my front sprocket. Sometimes a decent little puddle of oil, (but nothing that has affected my level) comes out from behind the front sprocket along with a butt-load of grease. The grease may be from my chain, but there seems like far too much for that to be the case. Could i have a bad seal behind my sprocklet? I just dont know, thats why im here and would appreciate any help on either subjects. Thanks alot