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Old 08-21-2008, 10:59 PM   #76
Bill English
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Laugh From the horses mouth...

Amazing stuff...
The reason ATF works in the 2-Stroke gear-case is because it's not the engine oil. Even then, looks like at least some people mix the stuff because??
Wow!
Anyway, ATF allows for clutch adhesion in a transmission no wonder someone would consider it for a two-stroke sump. However, take caution,... I wouldn't think that any ATF is designed to operate continuously at high temperatures. I.E. so close to the pistons.
Evaluate, and split the case some time and look at surfaces for burning, scoring, etc,... then get back to us.

Maybe if there's a bike that can do it all there's lubricant that can do it all.
Something tells me no...
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Old 08-22-2008, 04:54 PM   #77
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I must say that the reason I put it into the two stroke gear box is habit. It started in 1972. I had a Yammy DT2, Some one told me that Automatic transmissions had clutches and things like a dirt bike 'Wet bath". I was running GTX at the time and had developed clutch slip.

Gear changing is perfect you don't get clutch drag like with heaver oil.

So we all stuck ATF in and have been doing it ever since. Thats 36 years, and I have not had one gearbox problem. That all I can say about it.

The bike takes 800ml, I buy it in a 20Lt drum for around $70. I change it regularly.
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Old 08-23-2008, 10:32 AM   #78
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Current engine oil preference: Silkolene Pro 4 SX 15W-50 (API SF & SG, JASO MA) has the "MCN Big Claims TEST approval" for what its worth... Been running it for 3 oil changes now, overall impressions are good. But then I have not done any oil anylsis either.

Current chain lube preference: Elf Moto Chain paste- this stuff is awesome. comes in a aerosol also.
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Old 08-24-2008, 09:39 AM   #79
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I allowed myself to fall into this fucking "which oil for my KTM" thing for a while. KTM tries to scare the shit out of all of us with little enuendos that our watch-like engines will fling themselves into oblivion if we din't use their mother's milk Motorex. Ferkin Motorex is at LEAST 17 dollars a liter now in the U.S., considering that I still have a KLR I'm too damn cheap to pay that kind of cash for a bottle of oil.

I know there are a bunch of people running diesel oils with great success but in all the years of high performance motorcycle, car, and boat ownership I have used only Castrol GTX. I have to say right away if clutch problems were going to be an issue I would have seen them waaaaay before I became a KTM zombie. Seriously, if I didn't have clutch issues on a few GSXRs and a Busa with some serious mods and a nitrous bottle this 950 shouldn't reveal any issues.

I had tried in the beginning the Motorex, then switched to Mobil 1 4T, then to "regular" Mobil 1, then said, "This is madness!" So a couple of changes ago I dumped in good 'ol Castrol GTX 20/50 and that damn "Austrian Ducati" LOVES it! Right away the bike has shifted much smoother and I have stretched the ever lovin shit out of my chain and fried a rear tire looking for clutch slippage.

One small detail that has always bothered me about synth oil is that it comes out of the engine damn near as clean as it went in. One key function of engine oil is to contain dirt and contamination which is drained out during an oil change. GTX goes in clean and comes out dirty so I know it's taking some of the fine particulate crap out of the engine.

One key advantage of synth oil is supposed to be the fact that it can be run longer between changes. Who here runs their engine oil for 7 or 8 thousand miles before changing it? If I'm changing oil every 2500 to 3000 miles and the bike shifts better and has almost NO cam chain noise with the GTX why would I want to run some foo foo oil that costs more per liter than the GTX does per gallon? It really doesn't make sense now does it?

OH YEAH! You can't put dino oil in an engine after it's been run on synthetic - I know a bunch of you have heard that as well. I guess at this point in the game as far as my 950 is concerned I'll have to call BS on that one too!
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Old 08-24-2008, 11:02 AM   #80
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I have to agree with pretty much everything ADVMax said, though I do use motorcycle-specific oil (Valvoline) because it cured a clutch problem on another bike (the only oil related problem I have had.) For many years I used only automobile oil, for the simple reason that it was all that was available- it worked just fine.
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Old 08-24-2008, 05:22 PM   #81
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Quote:
Originally Posted by ADVMax
II have used only Castrol GTX. I have to say right away if clutch problems were going to be an issue I would have seen them waaaaay before I became a KTM zombie. Seriously, if I didn't have clutch issues on a few GSXRs and a Busa with some serious mods and a nitrous bottle this 950 shouldn't reveal any issues.

I had tried in the beginning the Motorex, then switched to Mobil 1 4T, then to "regular" Mobil 1, then said, "This is madness!" So a couple of changes ago I dumped in good 'ol Castrol GTX 20/50 and that damn "Austrian Ducati" LOVES it! Right away the bike has shifted much smoother and I have stretched the ever lovin shit out of my chain and fried a rear tire looking for clutch slippage.
I just wish to ad that in the 70's GTX was different, and from memory they did something to fix it as the word had got around about the problem with wet clutches. I think today some people still call it GTX 2. The damage had been done as many switch, and continued to use Valvoline XLD in our Honda 4's and so on.

Don't hold back Max
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K2m screwed with this post 08-24-2008 at 05:28 PM
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Old 08-24-2008, 11:16 PM   #82
Bill English
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Thumb Ideal Viscosity

Sounds like a lot of us are in agreement.

One note I'd like to drive home on using synthetics versus whatever,...

Imagine the end of a steel alloy shaft and the surrounding softer bearing material...
In an ideal world, the metal surfaces do not physically mate. At operational temperature, the motor oil provides a pseudo solidus material that prevents metal to metal contact.
Engine oil, dependent of each unique type of engine, will provide an ideal viscosity to maintain an ideal separation between metal surfaces. Synthetic oil does not necessarily push out oil changes. But it provides robust viscosity at high temperatures where other petroleum products might fail. Maybe, because of the lack of "break-down" in synthetics the change interval is longer. But I'd conclude that defeats the purpose in a high performance engine. I'd choose to change as frequently as possible and use excellent oil.

I know for a fact that using synth oil has prevented engine seize on VW air coolers. Having said that,... those engines were abnormally stressed and had no other means of cooling but poorly forced ambient air.
The KTM has plenty of airflow when necessary, + fluid cooled.
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Old 09-03-2008, 12:09 AM   #83
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Thumb Engine oil prefs

Quote:
Originally Posted by kitjv
A quick search through the forum archives didn't reveal a lot of info on riders' engine oil preferences. I know that KTM recommends Motorex Synthetic ( could they possibly have a proprietary interest in the brand?) & my dealer also recommends the same. But the $12/liter price tag is a bit staggering. Since I have used Mobil 1 in my BMW oilhead, Ducati, & Honda for years with no obvious adverse effects, I am inclined to continue the practice in the 950. And, admittedly, I subscribe to the dictum that it is more important to change your engine oil/filter regularly than the brand of synthetic oil. I do understand, however, the argument in favor of motorcycle-specific oils with specific additives. What are the thoughts of those of you who have had a long relationship with your 950?

As usual, thanks for your patient indulgence.

Kit


I use only AMSOIL in everything I have - with great results.
I get it from Sliklube. He is a motorcycle guy and seems very knowlegable about his products. I listened to him at the BMW rally in Oregon. As I understand it he goes to the BMW rallies a lot.
Call him at 509-301-6135
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Old 05-13-2010, 11:52 PM   #84
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Rekluse recommends rotella

That it not synth.
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Old 05-14-2010, 03:58 PM   #85
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Rotella 15w40.

I tried a few different brands (Castrol SynTec, Motorex, Mobil 1) and found Rotella works best on my bike.

If I lived closer to Frank, I'd steal his used oil
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Old 05-14-2010, 04:26 PM   #86
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Hey,
A few of us are at the Eastern Rondivous. Where da heck is ya Mr. ?
My fork cartidriges just blew out and I now have to ride the tar back darn it.


Quote:
Originally Posted by BobbyC
Rotella 15w40.

I tried a few different brands (Castrol SynTec, Motorex, Mobil 1) and found Rotella works best on my bike.

If I lived closer to Frank, I'd steal his used oil
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Old 05-14-2010, 05:08 PM   #87
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Quote:
Originally Posted by DockingPilot


Hey,
A few of us are at the Eastern Rondivous. Where da heck is ya Mr. ?
My fork cartidriges just blew out and I now have to ride the tar back darn it.
Where? Must've missed it with all the TOR threads.


That would never happen with a KTM 950/990...
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Old 05-14-2010, 06:10 PM   #88
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Old 05-14-2010, 08:37 PM   #89
Jody H
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Wait... you gotta change the oil?
I'll be damned... did not know that.











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Old 07-16-2012, 06:47 PM   #90
JustPlainDave
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Here is a link to some great lubrication info.......

I thought I'd pass it along incase anyone is interested.

I was listening to the podcast of Adam Carolla's weekly "Carcast" show. Last week his featured guest was
Lake Speed, Jr.

Speed, the son of former a NSACAR driver, is a certified lubrication specialist and oil monitoring analyst. He is also the general manager and head of technical support at Joe Gibbs Driven Racing Oil.

It was a very interesting show with lots of good lubrication info. I think he puts to rest some of the typical views that some of us had about motor oil. Enjoy!

http://www.adamcarolla.com/CarCastBlog/

Check out Carolla's other shows. His main podcast is great too.
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