2 stroke mix

Edited Date/Time 3/1/2014 8:43pm
hey everyone I have rm 250 2 stroke and ride preety hard and fast. what would be the best mix ratio? right now I do 40:1 I keep hearing that 50:1 is good too?
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Jakes Dad
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Brooksville, FL US
2/23/2014 4:51pm
Start with what the owners manual says. Then add up what everyone on here says and divide it equally. And then.......
kevkx125
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Douglassville, PA US
2/23/2014 4:56pm
Hondamilk#147 follow the instructions of what ever brand of oil you are using. Oil manufactures put a lot of r&d into their products, they know whats best for their product.
MxKing809
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Big Sand Whoops, MI US
Fantasy
1535th
2/23/2014 5:35pm
I ran 32:1 motoul 800 in my RM 250
2/23/2014 8:54pm
i had a 03 rm 250 and ran 50:1 with golden spectro. my buddy has an 04 running the same mix for over a year no problems

The Shop

Paw Paw 271
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Benton, LA US
2/24/2014 1:02pm
Remember that the lower the amount of oil used in the mix the richer the fuel mixture will be. The bikes are jetted from the factory for a specific fuel oil mix and changes to that will require some jetting changes.

Paw Paw
Brap
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Richmond, VA US
2/24/2014 1:12pm Edited Date/Time 2/24/2014 1:41pm
I ran 32:1 in my RM250 for years, I think it really helps with keeping the engine healthy as I had no issues with any of my bikes to date and have always ran 32:1. Even when I first got into motocross I was learning maintenance and I hadn't cleaned my filter or changed the oil in my RM125 for probably almost 2 years before the top end that was in it when I got it finally wore out. Lord knows how many hard hours that bike had on it when it finally went! Threw a new top end in it and sent it on down the road. Just make sure you choose a oil and stick with it, I prefer Castor 927 as it smells like heaven Wink


Remember, Everyone has there own opinions on whats best. When I was first looking for the best ratio everywhere I turned said 32:1 and I never looked back. Let us know how it goes!
MotoX85
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Centralia, IL US
2/27/2014 11:13am
32:1

Why oh why can people not undertand, MORE oil makes MORE power. Google it. There are endless articles out there proving this and I have found none saying the opposite. If you are getting sploodge, adjust your jetting, NOT your pre-mix ratio.

Never run anything less than 40:1, whether you can or cannot get away with it, I don't care what KTM manuals say (60:1), it is not healthy for the motor and you are losing ring seal.

Any good quality oil will work, pick your preference.
JW381
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Harrisburg, OR US
2/27/2014 10:50pm
I'm glad most run 32:1. Not sure why guys get off on running 50+:1. Jet it right and it'll be crisp. Or hell, leave the jetting a little rich and just ride the thing hard enough to keep the PV clean and you'll have fun AND your engine will last! I don't have the cash to be dropping pistons (and maybe even a new cylinder) in any more often than absolutely necessary. I run 32:1 H1R and when I put my new pipe on I took a look thru the exhaust port and everything was nice and oily and no signs of wear at all. That's my $.02 in my limited experience with 2-stroke maintenance.
YAMATHUMP
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Fort Worth, TX US
3/1/2014 5:10am
hey everyone I have rm 250 2 stroke and ride preety hard and fast. what would be the best mix ratio? right now I do 40:1...
hey everyone I have rm 250 2 stroke and ride preety hard and fast. what would be the best mix ratio? right now I do 40:1 I keep hearing that 50:1 is good too?
How has it been running at 40 to 1?
al711
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147
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1/5/2013
Location
Athens, AL US
3/1/2014 8:43pm
2006 rm 250, 32 to 1 Motul 800 2T

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