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Old 03-27-2013, 11:03 AM   #16
PSchrauber
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As you ride an MX bike.

As a rule of thump 1:50 or 2% for MX bikes is OK with modern fuel and modern two stroke oil.
Using this for my KTM 500 two stroke, (set up for trails riding), works very good does not leave much of deposits doesn't clogg the pipe and exhaust.

Too much oil will be sputted out and the engine will smoke a lot, 1:20 is old fashioned when often nothing else then motor oil used for four strokes was pured in the tank of tweo strokes.

If the engine is already "older" and havn't been overhauled you might use more oil the 1:50, it depends very much how you ride the bike, more MX or more trail riding for example. In thight trails where you use more the low and mid rpm too much oil is unhealthy the engine will often not get so hot to burn up the oil so it will sputted out at the rear end of the exhaust.

Instead when going very fast at an MX race more oil can be used for good conscience and to aviod any seizure, the engine will be more used at mid and high rpm will get much heater and therefor burn up the oil much better.

In own experience.
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Old 03-27-2013, 12:12 PM   #17
Scootern29
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I've been running Motul between 32:1 - 36:1 in my smokers..........old and modern with no problems. BTW, the new fuels suck canal water.

Scootern29 screwed with this post 03-27-2013 at 12:13 PM Reason: I can
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Old 03-27-2013, 01:31 PM   #18
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Originally Posted by CharlieT View Post
BTW, if you read that Gordon Jennings paper on 2/'s, you will have a better understanding of a 2/ motor than 90% of the people that ride them.
I've printed the Jennings articles, have some reading to do. Looks like good material.
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Old 03-27-2013, 07:16 PM   #19
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With straight synthetic, the top end looked great, no problems with gumming up and sticking a ring. However on engine teardown, there was minimal residual oil coating on bearing surfaces, etc. With straight castor, it would have a tendency to gum up the rings and leave more residues on the crown. However in engine teardown, the lower end looked much better and had more residual oil film present. That's why we blended a full synthetic with a castor.
The Klotz Super TechiPlate is a synthetic blended with 20% castor oil - http://www.klotzlube.com/proddetail....%5FQuart&cat=4 and http://www.klotzlube.com/techsheet.a...4&submit2=View .
Sound interesting?
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Old 03-27-2013, 07:58 PM   #20
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This is the head from my RZ350 after 13K miles. Amsoil Interceptor at the rate of 3-400 miles per liter through the injection system. It is as removed. The trail from the plug towards the exhaust port wiped off with a rag. And this is with brand name premium pump gas.

I'm a firm believer in loads of oil.



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Old 03-27-2013, 08:01 PM   #21
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Repsol 2T synthetic 40:1 KX and KDX

20:1 is way too much...I'd have spooge and smoke all over the place.
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That's what I'm thinking. The price of synth 2-T oil is not cheap, either. A 20:1 mix would be some high $$$ premix.
If you ever get tired of that gorgeous north country, come down and ride the hot desert. My main bike is a KLX300.
LET'S RIDE.

I was down there (Hatch/TorC) just last month...thaw is over so time to ride the north.
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Old 03-27-2013, 08:18 PM   #22
Mr. Carts
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So do I use Blendzall Green in my IT490 at 20:1 like the manual says?

At $56 per gallon for oil and permium gas at $4.35 mixed 20:1 with Blendzall will be $7.15 per gallon.
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Old 03-27-2013, 08:44 PM   #23
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This thread could go maybe 6-7 pages or more.
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Old 03-27-2013, 09:39 PM   #24
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So do I use Blendzall Green in my IT490 at 20:1 like the manual says?

At $56 per gallon for oil and permium gas at $4.35 mixed 20:1 with Blendzall will be $7.15 per gallon.
No, use Yamalube at about 60% of the cost. And as said before, don't use injector oil in premix.


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Old 03-28-2013, 02:38 AM   #25
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Klotz,R50 50:1,05 200EXC
Same for the 07 XCW,,maybe this will make it 4 pages more im guess.
I ran the same in the last KDX,and even the kids JR50,and DS80.
Ive had good luck with Klotz,little better gas milige,and less smoke then Amsoil.Just what i have found anyway.
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Old 03-28-2013, 04:28 AM   #26
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At $56 per gallon for oil and permium gas at $4.35 mixed 20:1 with Blendzall will be $7.15 per gallon.
That's what I'm sayin'. Makes riding my KLX with straight gas seem really cheap. If we could run 40:1 it would cut the cost of the oil by half. Guess it's going to cost big $$ for premix to get that big POWER RUSH from riding a big-bore 2-stroke. Speed costs... how fast do you want to go?
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Old 03-28-2013, 04:37 AM   #27
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"Klotz, R50 50:1. I've had good luck with Klotz, little better gas milage, and less smoke than Amsoil. Just what i have found anyway."
That Klotz R50 sounds like good oil from reading the info from Klotz. The Klotz Super TechiPlate has 20% bean oil blended in so it sounds like good stuff based upon the information provided by CharlieT.
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Old 03-28-2013, 04:40 AM   #28
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This thread could go maybe 6-7 pages or more.
Oil threads. Gotta luv 'em. Next up... TIRE THREAD!!!
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Old 03-28-2013, 08:54 AM   #29
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Oil threads. Gotta luv 'em.
Thanks to all the contributors. I definitely appreciate all the good information. It has been most helpful.
Next question: How long does premix last? Can I mix up 5 gal. (not that I would) and keep it for several months, or is it like plain ol' gasoline, goes "stale" after awhile? Actually, my plan is to mix up 2 gal. at a specific ratio and test it in the bike, then try another mix and test it, etc. If I don't burn up 2 gal. of premix, how long can I leave it in the gas tank without it going "bad"?
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Old 03-28-2013, 09:11 AM   #30
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The article below is fairly illuminating- I especially like the section on oil migration time, as that better explains the need for higher mix ratios on engines that are turning higher constant RPM.

My premix machines have always been run at about 30:1.... With varying oils and fuels, so I'm not going to make any recommendations as the actual need for a given engine will vary depending on usage.

http://www.klemmvintage.com/oils.htm
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