- Sep 28, 2003
I have a 1985 yz 125 that loses about 8 to 10 ounces of transmission fluid every riding session. I have rebuild the top end with being bored over and new piston and ring and bike runs strong. It seems like the trans oil may be burning thru the exhaust, is this possible ? Could it be possible that the bottom end needs rebuilding? Any info would be greatly appreciated.