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Motorex Crosspower 4t JASO rating? #5411546 04/23/20 07:03 PM
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Hey all, recently purchased some Motorex Crosspower 4t 10w-50 for the transmission in my 2020 KTM 250XC Tpi. Says on the Motorex website that it is JASO MA2 certified which is required for my model. I made the order online along with some various upgrade parts for the bike and my order arrived last week. While draining the oil from my bike I grabbed the bottle and was looking over the label and noticed that it is only labeled JASO MA. Has anyone come across anything like this before? Website says JASO MA2, bottle is listed MA. Should I still put it in? I feel like Motorex just cost me $18 for the wrong product. JASO MA2 is a higher friction coefficient as far as I know so will I experience clutch problems with this? Possible slipping? Was just planning on running the Motorex til 10hrs then looking for something cheaper like AMSOIL dirt 80wt or something. I should have just thrown in the thinner 10w-40 Mobil 4t I already have in the garage for my street bike which at least has an MA/MA2 rating. Any input much appreciated!

Re: Motorex Crosspower 4t JASO rating? [Re: FULLBLOWN] #5411571 04/23/20 07:34 PM
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I would still use it since you only plan on running it for 10 hours and then changing it out.

Back when I was obsessing over JASO MA ratings, the only difference I saw (based on oil analysis) between JASO MA and JASO MA2 was reduced Zinc and Phosphate levels in MA2 formulations. (I know the JASO specs don't have anything to do with those additives but at least on paper that was the only discernible difference)

Re: Motorex Crosspower 4t JASO rating? [Re: FULLBLOWN] #5411594 04/23/20 08:03 PM
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Do you think that the differences in composition will negatively effect the clutch plate material in any way? I just don’t want to ruin the friction discs in my brand new bike, I know the rest of the transmission is irrelevant.

Re: Motorex Crosspower 4t JASO rating? [Re: FULLBLOWN] #5411595 04/23/20 08:14 PM
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Originally Posted by FULLBLOWN
Do you think that the differences in composition will negatively effect the clutch plate material in any way? I just don’t want to ruin the friction discs in my brand new bike, I know the rest of the transmission is irrelevant.


I'd say you'll be OK. It was rated just "MA" because it didn't meet all the requirements of only MA1 or MA2 friction test specs.

This website has some good info on all the differences between MA, MA1 and MA2.

http://www.mototribology.com/articles/jaso-explained-part-1/



Re: Motorex Crosspower 4t JASO rating? [Re: FULLBLOWN] #5411650 04/23/20 09:21 PM
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Originally Posted by FULLBLOWN
Do you think that the differences in composition will negatively effect the clutch plate material in any way? I just don’t want to ruin the friction discs in my brand new bike, I know the rest of the transmission is irrelevant.


Friction discs will be fine as a 10W50 is not energy conserving and would not have friction modifiers.

Re: Motorex Crosspower 4t JASO rating? [Re: FULLBLOWN] #5411652 04/23/20 09:25 PM
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Thank you for the information. Just the fact that MA2 is a higher friction oil requirement was a little unsettling to me. I wish there was a better way to see what requirements the oil did fulfill!

Re: Motorex Crosspower 4t JASO rating? [Re: FULLBLOWN] #5411665 04/23/20 09:45 PM
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The Motorex Cross Power 4T 10W-50 is rated MA2 on the JALOS list dated April 1, 2020

Re: Motorex Crosspower 4t JASO rating? [Re: RDMgr] #5411679 04/23/20 10:16 PM
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Do you think I received old stock or something? Like they have updated the product? There are so many variables in these classifications it drives me crazy lol.

Re: Motorex Crosspower 4t JASO rating? [Re: FULLBLOWN] #5411698 04/23/20 10:53 PM
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Originally Posted by FULLBLOWN
Do you think I received old stock or something? Like they have updated the product? There are so many variables in these classifications it drives me crazy lol.


The only difference in the JASO classifications are the friction test ranges between MA1 and MA2. The MA1 range + the MA2 range covers the whole MA range. I really don't think a wet clutch is going to have issues if any of the JASO MA/MA1/MA2 specified oil is used.

Some guys claim any oil even with no JASO spec can be used with a wet clutch ... but that's a whole separate discussion, lol.

Re: Motorex Crosspower 4t JASO rating? [Re: ZeeOSix] #5411721 04/23/20 11:43 PM
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Originally Posted by ZeeOSix
Originally Posted by FULLBLOWN
Do you think I received old stock or something? Like they have updated the product? There are so many variables in these classifications it drives me crazy lol.


The only difference in the JASO classifications are the friction test ranges between MA1 and MA2. The MA1 range + the MA2 range covers the whole MA range. I really don't think a wet clutch is going to have issues if any of the JASO MA/MA1/MA2 specified oil is used.

Some guys claim any oil even with no JASO spec can be used with a wet clutch ... but that's a whole separate discussion, lol.


Shell Rotella oils have basically been JASO "self certified" since day one and riders collectively have put on a million+ miles on those oils in bikes with wet clutches. The Goldwing crowd loves Rotella and those guys ride thousands of miles since they're all retired lol.

And there's a few people here who have used Mobil1 15W50 which isn't even advertised as a MC oil lol

Re: Motorex Crosspower 4t JASO rating? [Re: FULLBLOWN] #5411833 04/24/20 08:21 AM
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traditionally MA or MA2 is fine, just not MA1


2019 Jeep Cherokee Trailhawk 2.0T
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Re: Motorex Crosspower 4t JASO rating? [Re: FULLBLOWN] #5411886 04/24/20 10:01 AM
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As far as I know it has been widely shown on BITOG, anything above an Xw30 weight is non energy conserving and is suitable for a wet clutch. 5w40, 10w40, 15w40, etc.

Since you are using this in a transmission and changing it out so often, find one that you like and go ride.

The oil you are choosing should be a fine one.

Re: Motorex Crosspower 4t JASO rating? [Re: Rand] #5412031 04/24/20 02:07 PM
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Originally Posted by Rand
traditionally MA or MA2 is fine, just not MA1


That doesn't make sense because MA covers the range of both MA1 and MA2. Why would MA1 not be OK if MA is?

Re: Motorex Crosspower 4t JASO rating? [Re: FULLBLOWN] #5412181 04/24/20 05:49 PM
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If I read this table correctly, which was from a link earlier in this post, for the oil to be considered as a specific category it has to meet all of the specifications of that category. For it to cross over into another category therefore it would have to meet all the specifications of the other category as well.

Looking at the table, MA oils that don't also carry the MA1 rating, are by default 1.60 and higher on the static friction index for example.

[Linked Image]

My eyes get crossed reading it, but I think it is accurate if you take a look at the table.

Re: Motorex Crosspower 4t JASO rating? [Re: Bonz] #5412211 04/24/20 06:52 PM
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Originally Posted by Bonz
If I read this table correctly, which was from a link earlier in this post, for the oil to be considered as a specific category it has to meet all of the specifications of that category. For it to cross over into another category therefore it would have to meet all the specifications of the other category as well.

Looking at the table, MA oils that don't also carry the MA1 rating, are by default 1.60 and higher on the static friction index for example.

[Linked Image]

My eyes get crossed reading it, but I think it is accurate if you take a look at the table.


The rating for the static friction spec changes from MA1 to MA2 when the static friction is 1.60 to <2.50.

If an oil meets only one of the three friction specs for MA1, and the 3rd spec falls into the MA2 category, then it has to be rated simply MA. Same is true for any of the 3 friction specs in the MA1 and MA2 categories.

Oil is rated JASO MA1 when all 3 of the MA1 friction specs are met.

Oil is rated JASO MA2 when all 3 of the MA2 friction specs are met.

Oil is rated JASO MA when neither MA1 or MA2 can meet all three of their specs, but still falls within the larger range of the MA specs.

The MA1 range plus the MA2 range equals the total range of the MA spec. JASO just split the MA spec range into two separate ranges, MA1 and MA2.


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