Author Topic: Running 200:1 in your 4 stroke  (Read 12152 times)

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Offline 01KX5WOODSRIDER

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Re: Running 200:1 in your 4 stroke
« Reply #15 on: September 27, 2008, 01:05:22 PM »
  I have been running 100:1 in my RZ-350 and DR-350 with no negative results. I havent torn either engine down since but I have
checked exhaust ports when the pipes are off and there hasn't been
any carbon buildup. 
Ricks rides
KX-500
KX-250
DR-350
RZ-350

Offline kawasaki_kev

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Re: Running 200:1 in your 4 stroke
« Reply #16 on: March 24, 2009, 05:16:59 AM »
Funny I've just ordered a 96 kx450F and was wondering exactly the same question. I have come across this on a diesel van forum and a lot of folk were claiming quieter running from startup along with better fuel consumption. I think they were also running at 200-1 and recommending cheap mineral two stroke oil. One German posted up TUV emmisions results before and after on a well worn engine and it passed when added. Any more trying this out? (Vehicles or X bikes)

Offline redlined_KX500

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Re: Running 200:1 in your 4 stroke
« Reply #17 on: March 24, 2009, 05:26:20 AM »

I've been mixing my 09KX450F at 200:1 with the Bel-ray MC-1 and C12 fuel.
 

Just over 15 hrs on bike thus far, runs awesome and seems to run cooler than comparable bikes I ride with. Also no changes in valve clearance. Unlike alot of riders I see, I make sure engine is very warm before I start rapping the throttle on make a couple of passes on pit road at partial throttle to cool engine before I shut it down.

As good as this bike runs, it's still anemic compared to my K5. :-D



















Don't be scared

Offline Dutch-K5 Fan

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Re: Running 200:1 in your 4 stroke
« Reply #18 on: March 24, 2009, 05:52:42 AM »



 Also no changes in valve clearance. I make sure engine is very warm before I start rapping the throttle on make a couple of passes on pit road at partial throttle to cool engine before I shut it down.



With my RMZ 250 I didn't run pre-mix, and in 4 years I had only changed valve clearence one's. Not even
when I put new valve's in. Don that 4 times. Now I'm not saying Pre-mix is bad for 4strokes, think it's not necessary.

It woulden't hurt also if you don't use to much!!


Dutchie
Proud owner of a KX500AF

Offline KXcam22

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Re: Running 200:1 in your 4 stroke
« Reply #19 on: March 24, 2009, 02:13:34 PM »
Dutchie,
  For me it's an experiment (my engineering moto is: "one good test is worth a thousand expert opinions") and an attempt to keep my engine alive an extremely long time.  It interresting that redlined mentioned cooler running.  I think I have seen that but didn't recognize it for what it was.  I put race temp strips on my rads and even after spending all day slogging in 1st gear I have yet to see very high temps or big boilovers.  This is my first 450 but I was expecting the worst for overheating after what I hear all the time.  I haven't even switched to engine ice yet.  The 2-stroke smell is nice. I have no fear of carbon due to previous results with the oil. I am also glad to hear I am not the only one doing this. Cam.

Offline Dutch-K5 Fan

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Re: Running 200:1 in your 4 stroke
« Reply #20 on: March 25, 2009, 06:35:50 AM »
I'm not trying to say anything bad about you all !!!!
Wanted to say that KX Valve's and valve seat's are super quality.

I know some guy's that put 1:40 pre-mix gas in there 4stroke because they take there buddy's fuel tank.
And a few minuts later it was over and out. The plug was fould.

But I've thought about it. Pre-mix could lube the piston witch resultmin less friction. So more power and less heat!!

Do you run a 1.6 radiator cap???
The water can run hotter, but is much better than boiling!!!! When we in Holland started to ride the 04 RMZ250.
we run it a little rich, so it could cool.


I'm intrested to reed how it works out futher.


Dutchie


Proud owner of a KX500AF

Offline augerman

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Re: Running 200:1 in your 4 stroke
« Reply #21 on: March 25, 2009, 06:52:01 AM »
Ya, I run 200:1 Blue Marble in my WR250f also :-)

Offline KXcam22

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Re: Running 200:1 in your 4 stroke
« Reply #22 on: March 25, 2009, 07:09:20 AM »
Dutchie,
Nothing bad taken. Like a said just an experiment, but I feel good about it and have been getting good results so far. The extra lube would reduce heat, but then oil burns hotter which adds heat (although at 200:1 there is not much oil).  I have no plug fouling worries since my K5 never fouled a plug in the 15 years I owned it (at 60:1).  Thats whats so nice about kxriders, it may be a radical idea but people discuss and explore it. I posed this idea on TT and got flamed bigtime. Cam.

Offline azdirtrider75

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Re: Running 200:1 in your 4 stroke
« Reply #23 on: March 25, 2009, 08:44:21 AM »
Very interesting idea. I plan to mix my fuel on my next 4-stroke. In fact I'm going to try it in my old 96 Ford Explorer that has 164K Miles. Follow me with your windows down and enjoy the 2-stroke smell as I try this out.
Live in the Phoenix Metro? (East Valley) Contact me, let's ride
azdirtrider75
nateopie@hotmail.com

Offline Good

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Re: Running 200:1 in your 4 stroke
« Reply #24 on: March 26, 2009, 05:51:30 AM »
I had a dream that I put premix in a Honda 4-poke the other night. :|  After my attempted backflip failed, I couldn't get the bike to run right...  Fouling plug...  Wierd dream but I woke up smelling Castor 927. :-D MMmmmm!

Offline KXcam22

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Re: Running 200:1 in your 4 stroke
« Reply #25 on: April 15, 2009, 07:45:46 AM »
Actually checked my plug today.  Rich, dry carbon but no oily residue. Need to tweek the jetting a bit.  25 hour valve clearances were perfect. Cam.

Offline jrhockey03

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Re: Running 200:1 in your 4 stroke
« Reply #26 on: May 06, 2009, 09:17:52 AM »
This is a hell of an idea. It would have never even crossed my mind. I've got a kx250 2-stroke but I demoed the '09 KX450 and I didn't want to like it but I did. If I was going to race full time again I would definetly have one, but I do mostly woods riding and I like my lighter weight 2-stroke. If this would make the top end on a 4-stroke last a bit longer I would be all for it and a 450!

Offline PowerFiend

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Re: Running 200:1 in your 4 stroke
« Reply #27 on: June 17, 2009, 08:15:01 AM »
I've run marvel mystery oil at around that ratio with no ill effects and clean exhaust ports, but that was mixing with U4.

Offline KX5Zuki

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Re: Running 200:1 in your 4 stroke
« Reply #28 on: June 17, 2009, 03:28:52 PM »
This is just personal opinion, but if your going for longevity, then go for it. I have a KFX450R, the quad version, and I have aftermarket exhaust, DASA full stainless header pipe, and an air box eliminator, also, re-programmed for peak power. My exhaust will glow red about 12" up the header pipe, so I am sure your exhaust valves would be hotter than that, so, there would be no problem burning the excess oil off.