Maintenance & Technical > KX500 Original
Oil thoughts and questions - anyone heard of this?
Friar-Tuck:
Thanks Cam, the more I learn, The more I learn I don't know...
Seek and you Shall find... :wink:
3 Razors,
you are also correct, some of the fixed gear sprint cart engines run 14 and 16:1 .
I would however like to clarifiy that these are built and jetted to be run that way.
The longer you hold the throttle WFO the more oil you need.
You also make a good point on Rpm.
Supposedly there were three cyl. 50cc Suzuki's and four cyl. 125cc Yamaha Road Race bikes that could produce upwards of 40hp... with 10 to 18 speed gearboxes
AT 18,000rpm! :-o the powerband was razor thin, and the pilot must have been banging through the gears at a ferver pace.
The harder you're working the engine...the more oil you need =)
I have found just plunking along singletrack, some hill climbing now and again and a few short WFO blasts ( probably a mile or so) I have settled with 40:1.
Please don't think I'm Telling ANYONE "YOU SHOULD RUN 40:1!!!"
We Have all read that kind of stuff....Oy-Va...
I had run up to 60:1 with no problems, but how much am I really saving by running that lean.. :?
The most important thing seems to be dialing in a set-up for your application.
(I'm still not happy with a Gear Oil, MA., JASO explanation yet..please..stand by)
Tuck\o/
KXcam22:
The main thing to keep in mind is to run what you want for oil - theres no real right and wrong. When I started with Belray MC-1 (synthetic) in 1979 its recommended ratio was 85:1 on the bottle. I got 52 pro MX races on a top end on my air cooled Maico 400 at 85:1. I was a believer after that and have never gone back. That is why I beleive what I do although I run a more sedate 60:1 (actually thats not true anymore since I am running 200:1 in my 4-stroke). But thats another story. Cam.
martinfan30:
Great info guys. I will be switching to synthetic (unsure of which yet) after my quart of 979 is exhausted. I didn't know about the problems with oil protection dwindling, and the sticky ring thing with using Castor.
It's also 14 bucks a quart here at the shop.
Friar-Tuck:
DMG, Martin you may find this interesting also:
Gordon Jennings was a guy who knew what he was talking about.
This has the info 3Razor was refering to as to oil ratio and hp.
http://www.bridgestonemotorcycle.com/documents/oilpremix6.pdf
Martin, there are some blended synthetic/castors out there you may want to consider. Best of Both?
http://www.maximausa.com/technical/lubenews/lubenews2000.PDF
http://www.blendzall.com/
http://www.klotzlube.com/storeCats.asp?ci=4
http://www.maximausa.com/products/2stroke/castor927.asp
Tuck\o/
martinfan30:
Thanks for the link. The 927 is the one I'm using currently. I thought it was 979.
BTW, what is "DMG" in your opening?
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