Maintenance & Technical > KX500 Original

ATF as Gear Lube

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monster malibu:
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.

redlined_KX500:

ATF works awesome in the gearbox.  I run Dextron in mine and change it every other ride.

I believe you'll find the clutch action superb and butter smooth shifting once you get that other garbage out.

My K5 had some kind of fancy bel-ray syn in the gearbox when I first bought it and shifting was terrible.  After a few oil changes and rides its back to what it should be. 800 ml of dex-3 is very cheap as a bonus.

Walter

alan:
I also have been using Silkolene for years, but if it is Gears-Bearings-Clutch Plates, what wouild be better Than ATF? Please someone give me any scientific reason why not?

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monster malibu:
I agree with everyone here Alan, I'm going to use up the last of my Silkolene and go to AFT. Is it possible to overfill the motor with oil?, I filled the bike with oil and the sight glass is full. I had to tip the bike a little to see the oil in the sight glass go down. Will it bother the bike to ride it overfull?

hughes:
Been using ATF in my 87 500 for the last 3 years with great results. If ATF can lube a transmission in my truck while hauling a boat down the highway at 75 mph I think it will work great in a simple clutch/gear box. I'm should be picking up a 05 yz250 this saturady and first thing the gear box will be drained and ATF added. I change the ATF every other ride. Looks the same color red as it did when I dumped it in the gear box.

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