Type f ATF for gear oil?

[imsimon]

hello,
im the proud owner of a new to me 2006 gas gas ec 250 and very pleased so far! it is currently on motul transoil for gear oil. I just wondered if anyone knows how the gassers react to ATF for gear oil? I would just carry on with what the previous owner used but as Ive got a fair few litres left of ATF that I used in a kdx 200 before It seems silly to get rid of it if the gassers works well with it?

also while im at it, its currently got the previous owners fuel in but running out soon he had motul 800 in it which is fully synthetic, ive got some putoline mx5 and not sure weather to stick with what is in there at the moment or switch to the semi synthetic of mx5?

thanks in advance
si

 

[(F5)]

There are a million threads on clutch suitable oil. They are quite sensitive to drag (kickstarting in gear can be a problem). I found Transoil 'plain' caused drag but transoil 'expert' is peachy. If it works keep with it & leave the atf for a car.

Same with 2stroke, run what you want but this thread will quickly be full of everyone's personal choice (a bit like what I did above).

 

[gasgasman]

When I worked for Ford, I got Type F fluid for free.
Used it in my bike with great results.

 

[andoman]

Another fan here of ATF. I use it mixed at 20% ATF.
Conventional wisdom says that you will want to change the ATF more often than a straight oil. Also, heat kills the properties of ATF quick, so if you are hard on clutches you will want to change it quite often.

 

[pscook]

I used straight engine oil previously, but found the clutch heavy and with drag. I switched to straight ATF and found the clutch to be inconsistent. I tried 50/50 ATF and 10w40 and found a perfect balance. Very little drag with the lever in, and good pick-up letting out the lever, no grabbing or lurching. However, I found that I get squawk from the clutch with my current blend of 75 10w40 and 25 ATF (Rekluse basket, non-OEM).

So, I recommend trying different blends of oils and figure out what works. Heck, the cheapest stuff out there is just fine for us tree-dodgers, but if I were racing I would use an expensive bike-specific (two stroke) gear lube.

You can also try 90w gear oil (non-hypoid). Lots of recommendations for that, but I haven't tried it yet.

 

[AZRickD]

ATF. I change it before and after every race, and after every two or three rides. Seems to be more frequent than it needs to be.

 

[imsimon]

Thank you.

I did want to make it a traditional arguement as to what brand is best more like was there any reason why I couldnt use up what ive got of atf.

Thanks for all your helpfull replies.

last question. If I switch premix brands do I need to completly empty my tank or is ok to use most of it and then fill up with the new brand
Cheers

 

[Jakobi]

I use this stuff.. Works a treat!

http://www.amsoil.com/shop/by-produ...ing-transmission-fluid-sae-10w/?code=ARTQT-EA

 

[GasGasDreamer]

I don't think that atf is made for this use.
I might work but its designed to work differently than the recommended oils.
shear force vs hydraulic pressure type of stuff
im not a petro engineer though

 

[Coop]

I ran it in a KX250 then a KDX200 for over 10 years. I got the best clutch action using it. Type F is very commonly used in two stroke gear boxes and has been for a long time. I liked it because I could buy it anywhere and didn't need a dealer to be open. I was given some Bel-Ray gear oil when I bought my Gas Gas that I am using up first, so I can't comment on it in my EC250.

You want to use type F if you decide to try it due to the additives that are designed to enhance clutch grip in auto transmissions. Mercon and Dexron contain additives that are designed to provide a soft clutch engagement in automobile slushboxes for smooth shifting

 

[Harry]

ATF type F and change it often

 

[gasgasman]

You want to use type F if you decide to try it due to the additives that are designed to enhance clutch grip in auto transmissions. Mercon and Dexron contain additives that are designed to provide a soft clutch engagement in automobile slushboxes for smooth shifting

100% correct statement.