Maintenance & Technical > KX500 Original
What 2-Stroke oil do you use?
Bigtim:
how about a thread on differant forms of race fuel we are all using? non av gas... :roll:
Ims Roll:
I've always been under the understanding that 2 strokes do not make power from compression as a 4 stroke does, so wouldn't higher quality fuel take more force to ignite and in turn be harder on a 2 stroke motor then lower quality 92oct?
Please correct me if i'm wrong.
Bigtim:
as i understand it, race fuel burns more complete at lower temps. pump gas is made for cars that redline where two strokes idle. " spooge" is actually unburned gas exhausted out. if you can afford it, why not? :evil:
NCwoods:
I only use Amsoil dominator mixed at 50:1. I have excellent results. Wrist pin bearing looks good, powervalves clean and moving freely, cylinder wall clean and sealed up with rings. This stuff is excellent. I go between 93 pump gas and power mist race gas. I like the leaded race gas. It does leave lead deposites, but the lead is also a nice high pressure lubricant.
Food for thought.
81cr450:
This is just my 2 cents & alot of change after reading on 2 stroke oil today. Figured I'd share
Spooge tells you where your at quite a bit, depending how much your cleaning / revving it out, you'll see it in extra oil dripping all over the back of your bike . You may want to adjust the ratio if your going to the dunes of if your going to be in the deep woods for the day. My experience anyway
I've been reading on 2T oils & the baseline for oil choice in 2 stroke bike oil is the JASO FD certification. From numerous oil threads alot of them came down to JASO FD.
One other trick I got from a builder is , on teardown inspect the oil puddle in the bottom of the case. You should have a 1/2" to 3/4" band of oil in the bottom of the case from what drips off the cylinder , case , & crank. Dave mentioned this as well
I "think" people have a hard time grasping modern technology. It's like 30 years ago & heads not having hardened valve seats. Valves would wear into the head & the head material would burn away. Now with more study in metallurgy you have a better use of ideal materials that will run 200,000 miles & show minimal wear. I have this problem myself when I hear of guys running 50:1 & 70:1. NO, NO you cant do that, but I know guys who "get away" with it. It really cant be "getting away" with it, the chemists must be developing better blends, how else can you explain it. Think of this 20:1 1970's & motor oil , 32:1 mid 80's & up with outboard oil. The manufacturer's had to give a mix ratio of the worst possible oil of the time for a safety margin, like they do with the jetting. "Now" you really have to consider the quality of what oil your using.
"Recreationaly" If your using extra spoogey marine follow what they did then 32:1, if you step up to JASO FD 40:1 ?, or if your running all out $20 a quart stuff 50:1 up to 70:1. Just my best guess , dont :cry: to me if you burn it up
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