Fork Oil Change 92 KDX250 SR

AlaskaKawiGuy · Post by **AlaskaKawiGuy** » 09:06 pm Feb 20 2013

I am changing the fork seals and oil on my 92 KDX 250SR. I was wondering if the oil was measured by volume or if you do (x) amount of oil from the top of the tubes. Thx all!

Post by **KDXGarage** » 11:28 pm Feb 20 2013

By level, not quantity

rbates9 · Post by **rbates9** » 11:52 pm Feb 20 2013

I have seen 90 - 130 mm often enough for different forks to say that if you can't find the right level you could start there.

Post by **bufftester** » 12:21 am Feb 21 2013

Pretty sure the 92 KDX250 is the same inverted fork on the 93-94 200. According to the manual fork oil capacity is 471 ± 4 mL. The standard fork oil level is 80 ± 2 mm with the fork spring removed and the fork fully compressed. Specification for front fork cap bolt torque is 29 N-m or 22 ft-lb. Like Rbates said, it's so nearly identical on all bikes that you're sure to be in the ballpark starting there.

Post by **KDXGarage** » 01:14 am Feb 21 2013

I think the SR 250 has 43mm tubes, not 41mm, like the USA 1993 - 1994 KDX200, so more oil. (though not level)

royadams · Post by **royadams** » 06:59 am Feb 21 2013

Don't know if Sr are diff. From us but race tech recommended 120 mm on my 93 kdx 250. I don't remember cc but I needed a little over a qt. To do both.

brandonvick83 · Post by **brandonvick83** » 01:43 pm Sep 02 2013

what does the +2 in 80+2 mean?

4x4fab · Post by **4x4fab** » 02:55 pm Sep 02 2013

It mean plus or minus 2. So 78-82

jgas · Post by **jgas** » 06:06 am Oct 12 2013

Can't you measure it either by volumn or level? Pretty sure most shop manuals give the specs both ways.

6 Riders · Post by **6 Riders** » 06:49 am Oct 12 2013

Just one recommendation from me.....use 7.5 weight oil, if you can't find it you can make it. It is "made" by mixing equal amounts of 5 wt and 2.5 wt oils before adding to your forks and then pour in the amount/measurement that you want. I would go with the minimum and then adjust volume by adding 5 cc at a time (per leg) with a syringe ( you can buy the correct size syringe from a moto shop). That is the best way to fine tune these forks that don't have adjustable rebound dampening.

MikNY · Post by **MikNY** » 08:15 am Oct 14 2013

Wouldn't you mix 5w and 10w to get to 7.5w?

6 Riders · Post by **6 Riders** » 05:58 pm Oct 14 2013

MikNY wrote:Wouldn't you mix 5w and 10w to get to 7.5w?

Um, yeah, that's what I meant....got to stop drinking and posting

MikNY · Post by **MikNY** » 06:45 pm Oct 14 2013

Haha awesome! Been there...

boghopper 250 · Post by **boghopper 250** » 03:35 pm Nov 01 2013

6 Riders wrote:Just one recommendation from me.....use 7.5 weight oil, if you can't find it you can make it. It is "made" by mixing equal amounts of 5 wt and 2.5 wt oils before adding to your forks and then pour in the amount/measurement that you want. I would go with the minimum and then adjust volume by adding 5 cc at a time (per leg) with a syringe ( you can buy the correct size syringe from a moto shop). That is the best way to fine tune these forks that don't have adjustable rebound dampening.

Someone once told me that atf is 7.5 wt. If this is the case that would be much easier, could someone confirm.

6 Riders · Post by **6 Riders** » 06:27 pm Nov 01 2013

I was at Cycle Gear and they have 7 wt fork oil on the shelf.

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