Maintenance & Technical > KX500 Original
Top End Longevity with good oil!
reknelb:
I picked up some mobil1 mxt synthetic 2 stroke oil. Haven't tried it out yet, but I've heard alot of good things about it. Mostly that it doesn't carbon up the power valves. I was going to run 40:1, maybe I will try 50 or 60:1?? How much, if any, did running 100:1 mess with your jetting?
alan:
I use Kawie Chem at 40 to 1 in El Paso desert with 50/50 race gas + 100 degree at 4000ft. !
Alan
NastyNick:
--- Quote from: KXcam22 ---Nastynick: I ran the H1-R at 60:1 part of last season figuring it would be good for the powervalve. Ran fine BUT... spooge everywhere even with perfect jetting and 60:1. My silencer is gross, black mess dripping out. Yuk. Have you had this same experience? The 12 years of MC-1 left almost no carbon on the powervalve or elsewhere.
--- End quote ---
I did have a spooge problem early last year after I did a rebuild on the motor at the same time, I installed a new reed system and moose spacer. The bike ran OK, but didn't "yank my arms out of the sockets" like I expected it to after the rebuild. It also spooged really bad. I suspected jetting so removed the moose spacer and worked on jetting. I finally got it right and the spooge stopped. Now my K5 is SCARY FAST and I haven't seen any gunk yet.
Not to get too far off topic, but d**n! this bike is a screamer. I hate stories about drag races on bikes, but I got one I have to share. Most of my riding is in the mountains or on the track so I put a FMF Gnarly Torque on it and left it at stock gearing. The other day I was out riding with a bunch of my friends who all ride 4-wheelers. My buddy Jeff was on his DS650 with NOS and a turbo (it's scary fast too) and he pulled up next to me while we were riding. He gave me that look (you know, the one that says "go for it") and I hit the gas at the same time he did (and the NOS). I don't know how fast we were going when I finally chickened out (coming to some curves), but when I chopped the throttle, I felt the front wheel hit the ground. Didn't even know it was in the air. I was in 2nd when we started and 5th when we stopped. He pulled up next to me and give me a wierd look. Later he told me I pulled that wheely for over 3/4 of a mile and threw rocks from the rear tire about 30 yards behind me!
Funny thing is, my K5 used to be his and he GAVE (yes, gave, free, except that I had to fix it up) it to me a couple of years ago. Now he is eyeballing an 04 K5 at the local kawi dealer ship.
moral of the story: JETTING is key and nothing beats the KX500!
Timbowe:
Ams 100:1 has worked perfectly in all of my 2 strokes over the last 20 years. During the 80s, there was a few stories floating round saying it was unreliable due to the fact a lot of racers were using the stuff [road and M/X] and having failures. Stories got out of hand and the oil was a dirtyish word round here. We had this guy here called Wayne Hill, who raced late 70s early 80s RD 350/400. They used to call him ''Lean down Hill'' cause he used to run his Ams at 120:1 quite often resulting in engine failure. But also impressive rider and bikes he was a bit of a legend round here. And owning the local Yamaha franchise was always gonna be a help to screwing every little ounce of power out of the gear. Amsoil send me info of independent test and studdies into the oils on the market at the present time and how they stack up. From what I have read on the net and elsewhere good 100:1 is right up there. Being realitively new to the Kx5 scene, I cant really report on it effects on my 92 [which as it turns out was worn beyond repair before I got the thing]a mate of mine who is a very knowledgable chap when it comes to all motorcycles, has always used it and rates it as the best. Same goes for another mate who is the chief mechanic down at the local yamaha/ Kawasaki dealership. But its the old thing that people say, If it works for you then stick with it. :lol:
reknelb:
I raced an rd400 a few years back in vintage classes. It was the "sieze queen". I ran that at 32:1, redline racing 2stroke oil (100% synthetic). Had the biggest jets I could run without it bogging. Still would lock up every now and then. :?
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