YZ 250 smoker

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11/29/2018 8:34 PM

I am gonna pick up a 2007 yz 250 this weekend, i have a 18 250sx and i run that at 60:1, i know that isn’t gonna fly with that yamaha. What ratios are you guys running in that?

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11/29/2018 8:39 PM

32:1

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11/29/2018 8:39 PM

32:1. Rips. Stock jetting is based for 32:1. If you go 40:1 or 50:1 it will effect the jetting pretty noticeably.

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Powerband in every gear !

11/29/2018 8:42 PM

32:1 on both my yz250x and regular yz250. They run outstanding!

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11/29/2018 8:42 PM

You'd probably be fine running that with todays oils, I have run 50:1 in my YZ from day 1 and I'm at almost 200 hours now (rebuild every 50 hours, crank at 150). Oil ratios are like favorite colors though, nobody is ever going to agree and will go with what they were taught until the day they die. If it worked in the KTM there's really no reason I'm aware of that it wouldn't work in the YZ, there isn't any major fundamental difference in how they function.

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Make Hillclimb Great Again

Ratbeach Racing

Instagram / YouTube: @485Josh

3dpmoto.com



11/29/2018 9:04 PM

40:1 straight c12 on my 05 and it rips!

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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @hammerfamily_4 & @2HRacing
Thanks to : Factory Effex, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, ASV, 100% & Mika Metals

11/29/2018 9:04 PM

Always ran my YZ250 at 40:1 with no issues.

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"Sorry Goose, but it's time to buzz the tower."

11/29/2018 9:12 PM

I ran 40:1 on my YZ250.

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11/29/2018 9:18 PM

50:1 on my 06 for 11 years with 927 it is all good!

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11/29/2018 9:19 PM
Edited Date/Time: 11/29/2018 9:29 PM

50:1 Redline, Tom Morgan recommended on my build. Only ran 32:1 petrol based for break in. As long as you run good quality oil (I prefer synthetic), correctly jet, good gas, and clean air you will be good.

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Craigslist Roacher to YZ315 Stroker Red Bull Straight Rhythm Build Here

Instagram @FVISSION
Facebook @FVISSION

11/29/2018 10:25 PM

40:1 on my 2007 YZ250. I must say that I am pretty slow. I rev the shit out of it before the gate drops, then after the first turn... eh, not so much. :-)

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11/29/2018 11:53 PM

50:1 Redline on my 07.

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11/30/2018 2:03 AM

40/1 dominator

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"Shifting gears and passing queers" GL

11/30/2018 2:31 AM

40:1 with silkolene, been running that for over 3 years with no trouble

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11/30/2018 4:25 AM

I run 40:1 with 927, but this bike is setup as a grunt machine (11oz FWW, FMF Fatty) so I don't often wring it out.

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11/30/2018 5:02 AM

40:1 Dominator

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11/30/2018 5:20 AM

32:1 is perfect. I believe the manual says 28:1 which is pretty heavy. The oil is lubricant for your motor so I wouldn’t skimp out

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11/30/2018 7:18 AM

50:1 Yamalube 2R in my 2007

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11/30/2018 7:57 AM

32:1 Yamalube 2R

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"A link is only as long as your longest strong chain"

11/30/2018 7:59 AM

Stuntman949 wrote:

32:1 Yamalube 2R

Gotta run Yamalube 2R. Only other stuff I'll run is SuperM if Yamalube isn't available

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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @hammerfamily_4 & @2HRacing
Thanks to : Factory Effex, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, ASV, 100% & Mika Metals

11/30/2018 10:25 AM

Been running YZ's since the mid 80's. Started with Super-M at 40:1 but with the power valve era, have been running Honda HP-2 since it first came out. 32:1, perfect. Not a motocross action guy, but this is has been a go to for jetting.

https://motocrossactionmag.com/mxa-wrench-tech-yamaha-yz250-two-stroke-jetting-from-1999-to-2014-2/

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11/30/2018 12:31 PM

Stuntman949 wrote:

32:1 Yamalube 2R

mattyhamz2 wrote:

Gotta run Yamalube 2R. Only other stuff I'll run is SuperM if Yamalube isn't available

I ran it for one top end as a test and went right back to Lucas. I can pick Lucas down the street at the auto parts store and it runs cleaner, no reason to use the 2R.

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Make Hillclimb Great Again

Ratbeach Racing

Instagram / YouTube: @485Josh

3dpmoto.com



11/30/2018 12:32 PM

32:1 half pump half race gas. Yamalube 2R because it's easy to get and does the job well.

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11/30/2018 12:51 PM

Honda HP2 Premix at 32:1 with 93 Pump.

Worked great in all my YZ 2-Strokes.

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11/30/2018 12:59 PM
Edited Date/Time: 11/30/2018 1:03 PM

I bought and raced a new YZ250 in the vet classes every year 2008-2015. Ran maxima 927 32:1 with 93 octane pump gas and never had an issue. Stock jetting. Pro circuit pipe and silencer, vforce reeds. Get the suspension dialed in for yourself and you have a race ready machine. Bulletproof. reliability on the YZ250 is second to none

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11/30/2018 1:07 PM
Edited Date/Time: 11/30/2018 1:08 PM

Also not sure if pro circuit still has any in the rafters somewhere but back in like 2009 or so I was able to score a special YZ250 “reed bend” works pipe. Matthes mentioned it on pulp once and sure enough it was legit thing.... And sure enough I wadded the pipe up a short time later at broome tioga in New York. Rock smashed a baseball size dent in it

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11/30/2018 1:21 PM

MX114 wrote:

Also not sure if pro circuit still has any in the rafters somewhere but back in like 2009 or so I was able to score a special YZ250 “reed bend” works pipe. Matthes mentioned it on pulp once and sure enough it was legit thing.... And sure enough I wadded the pipe up a short time later at broome tioga in New York. Rock smashed a baseball size dent in it

Send it to pipe repair!

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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @hammerfamily_4 & @2HRacing
Thanks to : Factory Effex, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, ASV, 100% & Mika Metals

11/30/2018 8:05 PM

alexk417 wrote:

Honda HP2 Premix at 32:1 with 93 Pump.

Worked great in all my YZ 2-Strokes.

Hp2 and Yamaha r2 is the exact same oil from the same supplier with a different dye.....just in case there is a shortage of Honda oil or which is cheaper at the moment. Just FYI.

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Did i do that?

12/1/2018 12:18 PM

Travis_Hudson wrote:

Hp2 and Yamaha r2 is the exact same oil from the same supplier with a different dye.....just in case there is a shortage of Honda oil or which is cheaper at the moment. Just FYI.

Really? Then please explain this.

Photo

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Powerband in every gear !

12/1/2018 2:06 PM

Had a few YZ's & ran HP2 @ 32:1 with no issues.

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Speak softly and carry a big stick.