Maintenance & Technical > KX500 Original

ATF as Gear Lube

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stu460:

--- Quote from: Ahole500 on June 10, 2009, 02:56:22 PM ---i may be a jackass but i've run automotive WYNNS 75-90 syn gear oil in mine for 1 yr now w/ no problem.i'm a GM tech and have a couple cases and some told me they run gear oil and never had any trouble so i did and i like it.but after all this ATF talk i dont know what i should put in it never oil change  :|

--- End quote ---


How did your clutch pack work with such a heavy oil,i think half the reason the synthetics are popular is cause there of a light viscosity with not much drag,but i like the idea of a heavy oil for protection but clutch would feel unresponsive i imagine?

Johnniespeed:
I have been using Dexron Three for four years now and it still works great, I now have a source for free BG synthetic ATF and  switched to that, I have seven gallons of free synthetic ATF.  I usually change it once a week costs me nothing, even the Dexron I got for free.  I am always carefull with the drain plug as I have heard of others stripping thiers. 
  I would like to know more about what the oil reps say about this topic.
 John

streetsweeper:
Hi all,    I ride a 2001 k5. I quit using maxima mtl 80w,  and switched to walmart super tech atf type f . after a couple of oil changes with atf.  my k5 no longer gives me a hard time when going through the gears.  thanks everybody that recomended atf type f. A lower end split/case inspection gets pricey.


thanks for the helpfull tip :-)

Ruben Chavez

KRSX:
wow, time for a swap! Will run ATF F in the bike next year

sandblaster:
This has been an interesting thread.
I have never tried ATF.
I have disassembled hundreds if not thousands of dirt bikes.
I have seen ATF to the newest synthetics and everything in between.
The bikes that come in that are clean and the air filters clean seem to be clean on the inside as well, regardless what is used as a lubricant.
The bikes that come in with caked on, baked on who knows what, with a air filter that looks like it was used as a chew toy for a pack of Rottweilers in a mud pit... typically they are very nasty on the inside.
True, the ATF bikes are very clean on the inside, usually a little cleaner than the more conventional lubed bikes.
Below is a pic of a YZ125 we were working on today that ATF was used in.
We haven't done any cleaning.
What you see is what it looks like immediately after the ATF was drained and the engine was disassembled.

The bike was true to form for a well maintained bike.
Yet, as far as gear wear.... I have seen no real difference between ATF and any other lube.
What seems to be the biggest factor to gear wear is the gear lube not being changed often enough.
The second thing we see is poor shifting habits.
So, what ever you use, change it often and pull your clutch lever all the way in, shift the bike in a positive manor, and then let your clutch out.
Your bike will live long and prosper  :-D

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