Two Stroke Motocross

Two Stroke Motocross Forum => Technical => Topic started by: Twostrokepower!!! on February 09, 2012, 02:09:14 AM

Title: kx85 tranny fluid? and leak?
Post by: Twostrokepower!!! on February 09, 2012, 02:09:14 AM
hey guys quick questions, what is good for tranny fluid in my 2002 kx85?


and also, my airscrew needle has a sllight leak out of it... like dirt gathers there because of fuel buildup (very small amount) do i need a new needle or what could be causing ths?

thanks!!!
Title: kx85 tranny fluid? and leak?
Post by: cnrcpla on February 09, 2012, 02:29:57 AM
I'm not sure about the fuel issue with the needle, but I think that SX Clutch saver is one of the best tranny oils out there for two strokes.
Title: kx85 tranny fluid? and leak?
Post by: Twostrokepower!!! on February 09, 2012, 02:36:54 AM
my local powersprts store gave me basic motor oil... its like 10w30 or 10w40... is that bad?
Title: kx85 tranny fluid? and leak?
Post by: cnrcpla on February 09, 2012, 02:41:30 AM
I was told by my motorsports store NOT to use that stuff. I was for a few changes and then the guys was like 'why do you buy oil when you have a two stroke?' and I said I used it as my tranny oil. He said it doesn't properly oil the clutch, but I'm not sure on that one. Four strokes use it, and the clutch is the same. I would do some research on that. But as for me, I will stick to my SX clutch saver.
Title: kx85 tranny fluid? and leak?
Post by: xandyx on February 09, 2012, 02:42:07 AM
that oil isn't good for that kind or engine. the oil will suit a road car engine were high rpm aren't reached.

that would work in you gearbox like water and the clutch would slip all the time.

try some 80w90 or 75w90 from a good brand, like maxima, lucas oil, belray, etc
Title: kx85 tranny fluid? and leak?
Post by: cnrcpla on February 09, 2012, 02:47:57 AM
Yeah that's what I thought but I wasn't sure.
Title: kx85 tranny fluid? and leak?
Post by: Twostrokepower!!! on February 09, 2012, 02:59:37 AM
sheesh, well i guess i better get some good stuff, why is it different from 2 and 4 strokes? seems weird!
Title: kx85 tranny fluid? and leak?
Post by: TMKIWI on February 09, 2012, 04:06:36 AM
Quote from: Twostrokepower!!! on February 09, 2012, 10:59:37 AM
sheesh, well i guess i better get some good stuff, why is it different from 2 and 4 strokes? seems weird!

Because 4 stroke oil has to deal with combustion contaminant's while gearbox oil does not.
Also gearbox oil has a higher shear rating which is better for your gearbox.
You would not put 80w90 into a engine so you shouldn't put 15w40 into your gearbox.
Title: kx85 tranny fluid? and leak?
Post by: eprovenzano on February 09, 2012, 02:22:09 PM
When you ask questions about tranny fluid you are going to get 1,000 different opinions...  I run AFT (Automatic Tranny Fluid)  I've been running that since the 70's (yes I'm an old fart) without any issues.  I change it often as its cheap and easy to change. Everyone has an opion, and they are all like ripe onions, (they all stink)   :D

As far as the leak.  turn the screw in can count the turns.  Then remove the screw, clean everything, and ispect to see if an o-ring may be missing or damaged.  Check with an on-line parts diagram to see if there in an o-ring or somethng causing the leak.
Title: kx85 tranny fluid? and leak?
Post by: MetalMike1982 on February 09, 2012, 04:33:18 PM
 I've ran 10w40 in every bike, trike and quad Ive ever owned with zero issues . I think its pretty much all in personal preference .
Title: kx85 tranny fluid? and leak?
Post by: cnrcpla on February 09, 2012, 05:29:07 PM
Like eprovenzano said, 1,000 different opinions.  :D
Title: kx85 tranny fluid? and leak?
Post by: Toadmeister00 on February 10, 2012, 03:18:30 AM
Man, you guys are making this waaaaaay to complicated!   ;D

It's just a 2T transmission...they'll live with just about anything in there.
Title: kx85 tranny fluid? and leak?
Post by: TMKIWI on February 10, 2012, 03:40:57 AM
Run what you want.
It doesn't really matter.

Twostroke power asked the question.
Quote from: Twostrokepower!!! on February 09, 2012, 10:59:37 AM
sheesh, well i guess i better get some good stuff, why is it different from 2 and 4 strokes? seems weird!

I gave him the answer. Was not an opinion as this could go on for day's. ;)
Title: kx85 tranny fluid? and leak?
Post by: cnrcpla on February 10, 2012, 03:46:55 AM
Quote
I gave him the answer. Was not an opinion as this could go on for day's. Wink
  It probably will  :P Everyone has a different opinion. Just what ever you use, change it every 7-10 hours. Know matter what you use, as long as you change it that often, it shouldn't matter, as long as you don't put acid or something in  ::)
Title: kx85 tranny fluid? and leak?
Post by: Twostrokepower!!! on February 13, 2012, 01:42:09 AM
any more info on the carb leak? can i silicone that needle along the seat or no?
Title: kx85 tranny fluid? and leak?
Post by: cnrcpla on February 13, 2012, 02:16:48 AM
Did you check to see if the O ring was still good, or there at all? If it is there and in good shape, try putting a LITTLE bit of grease on it, it worked for a tranny oil leak I had even with a new gasket. I think silicon would work to, but I don't know for sure on the silicon.
Title: kx85 tranny fluid? and leak?
Post by: TMKIWI on February 13, 2012, 07:20:35 AM
Quote from: Twostrokepower!!! on February 13, 2012, 09:42:09 AM
any more info on the carb leak? can i silicone that needle along the seat or no?

No. Replace the o-ring.
Title: kx85 tranny fluid? and leak?
Post by: SachsGS on February 13, 2012, 03:42:46 PM
Silicone seal has been the death of many a carb. :-X

I'm pretty sure the manufacturer calls for a 10-40 oil (just to complicate things further).
Title: kx85 tranny fluid? and leak?
Post by: cnrcpla on February 13, 2012, 10:16:03 PM
That's why I wasn't sure about the silicon. A new O ring would be the best possible thing to do though.
Title: kx85 tranny fluid? and leak?
Post by: Twostrokepower!!! on February 15, 2012, 01:07:07 AM
there wasnt even an o ring! just a spring on it.....
Title: kx85 tranny fluid? and leak?
Post by: cnrcpla on February 15, 2012, 02:28:25 AM
Check  a carb diagram to make double sure it needs one then order it in. Make sure the diagram is for the same model bike.
Title: kx85 tranny fluid? and leak?
Post by: TMKIWI on February 15, 2012, 08:42:16 AM
All air screws have an o-ring.
Title: kx85 tranny fluid? and leak?
Post by: cnrcpla on February 15, 2012, 12:28:37 PM
Well, there you go. Order it in  ;D