Running 200:1 in your 4 stroke

[Dutch-K5 Fan]

 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

[Dutch-K5 Fan]

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

[augerman]

Ya, I run 200:1 Blue Marble in my WR250f also

[azdirtrider75]

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.

[Good]

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. MMmmmm!

[jrhockey03]

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!

[PowerFiend]

I've run marvel mystery oil at around that ratio with no ill effects and clean exhaust ports, but that was mixing with U4.

[KX5Zuki]

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.