Maintenance & Technical > KX250 / KX125
2-Stroke engine oil?
Sapper:
Well, this isn't because I am a dealer but I have run Amsoil long before that. We run dominator @ 40:1. (beware, theres a dominator racing oil for cars and one for 2 stroke)
Internals are always clean and we alway's get great time out of our topends, @ 75 hrs or so. This is hard racing and riding. My boy is brutal.
If you choose this, you can become a preferred customer and pay cost and have it delivered to your door or find a local dealer and see if he stocks. Most don't, they will order for you and have it sent to you. Eventually if you see a need, you can become a dealer. Theres good money in it. and here's a link to a comparison. http://www.amsoil.com/products/streetbikes/WhitePaper.aspx
Click on the other oils to see how they match up.
As for the tranny, I run just plain ol' ATF type F. I could run Amsoil m/c 10/40 or supershift. But my wife is a manager of an Advance Auto parts so a discount there helps. I have been running type F since I was a kid in the 70's and 80's.
Here's a pic of my sons kx100 clutch during a rebuild. Then some of the 112 during the build.
BDI:
I maintained a bike for a guy who ran nothing but ams oil. We would do his top end every twenty hours and the top end and exhauste valve was horribly sludged and carboned. Yamalube way out performed it in this aspect and yamalube is not known for being the cleanest burning stuff in the world.
hughes:
--- Quote from: Coop on July 16, 2010, 01:50:49 PM ---I use YamahaLube 2R (not 2S) mixed 32:1 in all my two strokes.
I generally run ATF in the trans, but if I don't have that 10w-40 is cheap too. I don't buy bike specific trans oils, too expensive.
--- End quote ---
I also run Yamalube 2R the cleanest oil I have ever ran. 32:1 in all bikes / ATF Type F has never let me down in a 2-stroke tranny.
Sapper:
--- Quote from: BDI on July 21, 2010, 04:16:40 AM ---I maintained a bike for a guy who ran nothing but ams oil. We would do his top end every twenty hours and the top end and exhauste valve was horribly sludged and carboned. Yamalube way out performed it in this aspect and yamalube is not known for being the cleanest burning stuff in the world.
--- End quote ---
Thats really wierd. All of ours is clean. Slight carbon across the top of the piston and PV's clean. What did he mix it at? Dominator or interceptor should be no thicker than 40:1. I used to run 50 but concience got the best of me. Mike Leavitt riding Project 250 is running 100:1 with Amsoil. Granted, the motor has alot of special internal work and machining but they have not had an engine or internal part failure or premature wear yet.
But oils are a personal preference.
don46:
I've ran Amsoil, I can't say anything bad about it nor can I say anything exceptional about it. you can run most oils at 100:1, the damage is not on the front end it's on the back end, so if your motor would last 100 hours at 40:1 then maybe at 100:1 it would only last 20 hours. On a race bike wear isn't a big issue, durability is because most mikes get torn down frequently. we put pistons in our 125 race bike monthly, it was only raced never practiced so we didn't really care about wear.
many years ago there was test of some of the 2t oils such as bel ray, maxima, golden spectro, castrol you get the idea, the worst oil tested was yamalube, and of course thats what I ran in my snowmobile, which I did notice signifcant carbon buildup. after the article no more yamalube.
Now for my .02, I think any good oil rated TCW 3 is the ticket, I believe this classification is ashless and burns very clean. I have also used redline and swear by it, it is very expensive so I don't use it for play riding but good stuff. Tranny oil Rotella T only for me.
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