Hey guys, I got my 87 KX500 two moths ago and I noticed the oil level was low when I got it. I told the previous owner I heard about using ATF in my bike, and he just about had a heart attack! I thought the same thing you guys did, ATF works in everything else I drive, why not my bike. I was told NOT to switch to ATF and to keep using what's in the bike now. The bike is running FUCHS Silkolene semi-synthetic ester racing gear oil. WHEN THIS SH%T's gone, I'm switching. If I switch will it bother the clutch, or should I switch when the clutch is cooked? How often should I be dumping the oil, I only ride 3 times a week for a few hours on the trails.