YZ 250 smoker

UPSman334
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UPSman334
Edited Date/Time 12/4/2018 8:15am
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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FGR01
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FGR01 11/29/2018 8:39pm
11/29/2018 8:39pm
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.
NeedMoto
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NeedMoto 11/29/2018 8:42pm
11/29/2018 8:42pm
32:1 on both my yz250x and regular yz250. They run outstanding!
JM485
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JM485 11/29/2018 8:42pm
11/29/2018 8:42pm
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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mattyhamz2 11/29/2018 9:04pm
11/29/2018 9:04pm
40:1 straight c12 on my 05 and it rips!
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-MAVERICK-
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-MAVERICK- 11/29/2018 9:04pm
11/29/2018 9:04pm
Always ran my YZ250 at 40:1 with no issues.
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Mx451
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Mx451 11/29/2018 9:12pm
11/29/2018 9:12pm
I ran 40:1 on my YZ250.
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SmokinJoe439
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SmokinJoe439 11/29/2018 9:18pm
11/29/2018 9:18pm
50:1 on my 06 for 11 years with 927 it is all good!
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Yz229
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Yz229 11/29/2018 9:19pm
11/29/2018 9:19pm Edited Date/Time 11/29/2018 9:29pm
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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KDXGarage
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KDXGarage 11/29/2018 10:25pm
11/29/2018 10:25pm
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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Doddy
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Doddy 11/29/2018 11:53pm
11/29/2018 11:53pm
50:1 Redline on my 07.
chump6784
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chump6784 11/30/2018 2:31am
11/30/2018 2:31am
40:1 with silkolene, been running that for over 3 years with no trouble
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DoctorJD
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DoctorJD 11/30/2018 4:25am
11/30/2018 4:25am
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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chase383
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chase383 11/30/2018 5:02am
11/30/2018 5:02am
40:1 Dominator
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cody41
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cody41 11/30/2018 5:20am
11/30/2018 5:20am
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
mx_563
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mx_563 11/30/2018 7:18am
11/30/2018 7:18am
50:1 Yamalube 2R in my 2007
Stuntman949
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Stuntman949 11/30/2018 7:57am
11/30/2018 7:57am
32:1 Yamalube 2R
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mattyhamz2 11/30/2018 7:59am
11/30/2018 7:59am
Stuntman949 wrote:
32:1 Yamalube 2R
Gotta run Yamalube 2R. Only other stuff I'll run is SuperM if Yamalube isn't available
1
Herb Eaversmells 11/30/2018 10:25am
11/30/2018 10:25am
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-…
JM485
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JM485 11/30/2018 12:31pm
11/30/2018 12:31pm
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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Moto520
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Moto520 11/30/2018 12:32pm
11/30/2018 12:32pm
32:1 half pump half race gas. Yamalube 2R because it's easy to get and does the job well.
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alexk417
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alexk417 11/30/2018 12:51pm
11/30/2018 12:51pm
Honda HP2 Premix at 32:1 with 93 Pump.

Worked great in all my YZ 2-Strokes.
MX114
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MX114 11/30/2018 12:59pm
11/30/2018 12:59pm Edited Date/Time 11/30/2018 1:03pm
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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MX114
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MX114 11/30/2018 1:07pm
11/30/2018 1:07pm Edited Date/Time 11/30/2018 1:08pm
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
mattyhamz2 11/30/2018 1:21pm
11/30/2018 1:21pm
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...
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!
1
Travis_Hudson 11/30/2018 8:05pm
11/30/2018 8:05pm
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.
FGR01
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FGR01 12/1/2018 12:18pm
12/1/2018 12:18pm
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...
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.


H4L
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H4L 12/1/2018 2:06pm
12/1/2018 2:06pm
Had a few YZ's & ran HP2 @ 32:1 with no issues.
Travis_Hudson 12/2/2018 9:18pm
12/2/2018 9:18pm
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...
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.
FGR01 wrote:
Really? Then please explain this. [img]https://p.vitalmx.com/photos/forums/2018/12/01/306753/s1200_oil.jpg[/img]
Really? Then please explain this.


You beleive everything you read? Had a friend that tested at Honda, sometimes they ran short of HP2.....they would just send yamaha lube instead....from Honda. Lable is a label as far as im concerned, they could tell you its made from real goats milk and you would bite.

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