TE/TC Fork Oil Weight and Type from factory - 2017 Husqvarna TE250

Looking for some help.
Have searched around, forums and internet and not found the answer.

Even the manual and the part number provided by the manual for the fork oil doesn't specify what weight oil was used OEM from factory.
My manual says to use 610ml of SAE4 fork oil and the part# is 48601166S1.

Can anyone please confirm the oil weight from factory?



My new 2017 with 8 hours on it is leaking from the fork cap.
I will be replacing the cap seal and draining the oil in case dirt got in and fill with fresh clean oil.
I want to use exactly the oil height and weight on how it came from factory.

I want to use exactly the oil height and weight on how it came from factory.Even the manual and the part number provided by the manual for the fork oil doesn't specify what weight oil was used OEM from factory.
My manual says to use 610ml of SAE4 fork oil and the part# is 48601166S1.

Can anyone please confirm the oil weight from factory?

My manual (OEM KTM/Husky I presume) says to use 610ml of SAE4 fork oil and the part# is 48601166S1 how much more OEM confirmation do you want?

610 ml of SAE 4 , no? the manual usually even states what the current brand being used is as well, BelRay is the current OEM Husky brand in use.

What weight is being listed in the manual? I think you missed the question. Also manual doesn't specify Belray for the fork oil, check again.
I did some further digging and found out why no one knows.
Everyone usually recommends 5wt. Manual only says the SAE rating and the 610ml level as well as part number but that's a bulk order only.
Long story, KTM and WP are using their own oil/wt when the forks come stock from factory.
The oil is not readily available in north America so most just automatically switch you to 5wt which is fairly standard.
Also since the rest of the fluids in the Husky call for BelRay instead of Motorex for brand and relationship management, it's assumed the Husky would have Belray in the forks which isn't the case based on the part# and what KTM customer service confirmed.

Sorry forgot to mention. For anyone else that wanted to know KTM is using a special Motorex "4 weight oil" from factory in their forks.
Not sure about how it works in the USA but will likely be similar to what he said for Canada. Only the 5L Case was available which was between $200-230 USD. But since there was overwhelming demand he said at least in Canada the 1 litre jugs of the Motorex 4 weight oil will be available through dealers that are affiliated with Parts Canada starting this October.

If you can find a material data sheet for the Motorex you can look up the kinematic viscosity then find an oil that is easily available with the same or similar viscosity.

SAE numbers for suspension oil viscosity are practically meaningless

The KTM rep directed me to this.
Parts Canada should be getting them mi-October this year.

https://www.motorex.com/en-us/moto-line/fork-oil/racing-fork-oil-4w/

Motorex racing Fork Oil 4w


Technical data


Properties Unit Test according to Values



Colour red

Density at 20 °C ASTM D4052 0.881

Viscosity at 40 °C mm²/s DIN 51562-1 16.0

Viscosity at 100 °C mm²/s DIN 51562-1 5.0

Viscosity index DIN ISO 2909 >250

Pourpoint °C ASTM D5950 <-40



Flash point C.O.C. °C DIN EN ISO 2592 >130

https://www.peterverdone.com/archive/lowspeed.htm

You have already listed this as far as P/Ns go, but I have the WP factory proprietary fork specification sheet for example.
This one is for the 4860 MXMA AER 48 fork
Oil Type 48601166
SAE 4
fork stroke 310mm
fork length 950mm
reservoir spring 48601258

so looking at those proprietary P/Ns I assume the 4860 to be the fork body series designator

BTW you guys are getting way too surgical.
But really, if you are that set on what to use, why don't you call WP NA factory services at their factory suspension shop and ask them what to use. Or email them. I had them rebuild my Trax shock and they were very easy to speak with and helpful to answer any questions.
This subsidiary exists to support WP products, they are a quick walk away down the street from KTM and Husqvarna NA and their Factory racing shops.

https://www.wp-group.com/news/wp-north-america-introducing-the-wp-family/


CONTACT? (951) 234-2254 or www.wpfactoryservices.com.

Thanks for posting contact.
I'm trying to keep it simple myself.
Just want to confirm what came from factory and use the same.

None of my business, but why would you not simply use some 5W Maxima fork fluid or other reputable fork oil? I doubt a person could tell 4W to 5W. I couldn't. Cam.

That would be a very good choice if you want to use the same viscosity. The Maxima 5W actually has slightly lighter viscosity than the 4W Motorex, though it's so small it wouldn't be noticeable.

A good indicator of how the SAE W rating is meaningless for suspension fluid.

Ditto. Try something good and if you can tell the difference and don't like it try something else.

Because it defeats the purpose of my post.
Have used plenty of 5w. My original topic was to find out, and that I have.
Also have shared for anyone else that might want to know.
Also I'm only working on a single fork which is leaking from factory and plan to put the same oil that is in the fork I'm not opening up.

That's assuming what's spec'd is actually what's in there Hopefully things have changed for the better and that's the case these days. Best practice has always been to change the original fork oil after break in anyway to avoid contamination from assembly lubes

Yes I totally agree on best practice dump all fluids when new and grease all the points.
Will be doing that this winter anyway and hopefully address idle gear bolt issue also.