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Author Topic: What premix ratio do you run?  (Read 48476 times)

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Offline colokawi

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What premix ratio do you run?
« on: February 22, 2009, 02:54:25 PM »
I'm just curious what ratio's do you run and what experience you might have?
I've been running 40:1.
Thanks.
« Last Edit: February 23, 2009, 04:07:01 AM by Danger4u2 »
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stewart

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Re: What premix ration do you run?
« Reply #1 on: February 22, 2009, 02:59:03 PM »
with what oil i run 50 to 1 with belray h1r
« Last Edit: April 12, 2009, 12:55:23 PM by stewart »
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Offline turtle22

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Re: What premix ration do you run?
« Reply #2 on: February 22, 2009, 04:01:17 PM »
i run 36to1 and my kx seems to like that. i use valvoline.but thats at sea level. i was pinging alittle at 6000 ft.
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Offline BDI

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Re: What premix ration do you run?
« Reply #3 on: February 22, 2009, 05:16:09 PM »
I run 40:1 and have for years with good luck. Stewart I thought you ran a leaner oil ratio then that. Turtle22 what the hell do you mean you were pinging at six grand, your bike should have been running fatter then hell at that altitude.
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Offline KX500freak

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Re: What premix ration do you run?
« Reply #4 on: February 22, 2009, 09:19:55 PM »
Quote from: BDI on February 22, 2009, 05:16:09 PM
I run 40:1 and have for years with good luck. Stewart I thought you ran a leaner oil ratio then that. Turtle22 what the hell do you mean you were pinging at six grand, your bike should have been running fatter then hell at that altitude.


always 40:1 over 22 years long ,never ever did i had a seized engine .
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Offline tharden

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Re: What premix ration do you run?
« Reply #5 on: February 23, 2009, 01:20:54 AM »
I run 50:1 with golden spectro.  Have not had a problem.  I do not desert race but under those condition I would think 40:1 would be more appropriate.
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Offline KXcam22

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Re: What premix ration do you run?
« Reply #6 on: February 23, 2009, 03:00:34 AM »
I ran 60:1 Belray MC-1 in my 500.  Now I am runing 300:1 Belray MC-1 in my 450.  Cam.
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Offline turtle22

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Re: What premix ration do you run?
« Reply #7 on: February 23, 2009, 03:41:10 AM »
Quote from: BDI on February 22, 2009, 05:16:09 PM
I run 40:1 and have for years with good luck. Stewart I thought you ran a leaner oil ratio then that. Turtle22 what the hell do you mean you were pinging at six grand, your bike should have been running fatter then hell at that altitude.
im still tring to figure the sound out,i has pinging in my exhaust(the big bladder part) when i was racing in the high desert,almost 6500 feet at the top of the mountain(out side of fernley,NV).i rode the bike sunday here in Sac,CA and everything was cool so, i figured it must have been the altatude and the air/fuel mixxer. any ideas?
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Offline martinfan30

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Re: What premix ratio do you run?
« Reply #8 on: February 23, 2009, 04:30:12 AM »
It wouldn't be pinging up that high. Like already mentioned, it'd be real fat and running cool.

BTW, are you from Fernley? I live in Dayton.
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Offline turtle22

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Re: What premix ratio do you run?
« Reply #9 on: February 23, 2009, 09:38:58 AM »
no i live in Sacramento(citrus heights) but i have started racing in the MRANN. it races mostly around that area. abunch of my buddies went up and rode moonrock on sunday. i did not make the trip,next time.   
when i say "fat"what do u mean by that term?
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Offline BDI

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Re: What premix ratio do you run?
« Reply #10 on: February 23, 2009, 10:11:39 AM »
Fat would mean more fuel then air. when you go up in altitude the air is less dense so the air fuel ratio changes. more fuel then air is FAT less fuel then air is LEAN. Lean causes detination and burned up engines, rich/fat causes pore performance and fouled spark plugs.
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Offline bigbellybob

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Re: What premix ratio do you run?
« Reply #11 on: February 23, 2009, 10:57:20 AM »
FAT on top of causing pore performance and fouled spark plugs. also runs HOT and can lead to over heating and all the problems that come with it.

as for the mix i run 40:1 in my big bike and 32:1 in the small bore bikes 50-100cc.
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Offline azdirtrider75

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Re: What premix ratio do you run?
« Reply #12 on: February 23, 2009, 11:04:22 AM »
I used to run 32:1 but just switched to 40:1 My 2002 KX250 seems to like it
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Offline Albertan

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Re: What premix ratio do you run?
« Reply #13 on: February 23, 2009, 02:01:26 PM »
Yamalube 2R at 40:1, no problems riding on MX track or offroad.  I agree with other posters about pinging at 6500 feet being a bit strange, especially if jetting is ok at lower elevations.
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Motorrad

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Re: What premix ratio do you run?
« Reply #14 on: February 23, 2009, 02:08:15 PM »
40:1 on the K5  Avgas

36:1  all my old air cooled bikes

60-80:1 on my trials bike

Run Royal Purple two cycle oil now...

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