2017 Yam YZ250f MR12 & Vortex

sparker245
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sparker245
Need some suggestions about getting a couple more HP out of my 2017 Yamaha YZ250f, preferably without any motor work. Love the power of the bike stock, but another four HP or so would be my goal. Currently stock except for a Dr. D slip on exhaust. Have heard that VP MR12 race gas plus a Vortex ignition could produce the HP I'm looking for, but would like some opinions or suggestions. Have an older YZ250f for practice, so this one would only be used on race day....race gas cost would therefore be manageable.
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Rogerson207
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Rogerson207 1/30/2017 5:53pm
1/30/2017 5:53pm Edited Date/Time 1/30/2017 5:54pm
Might try the GYTR air boot and Twin Air powerflow air filter kit. The air boot might just be a 450 air boot but I have seen it called that and an actual GYTR part so I am not sure which is correct. Several motor builders use that air boot because of better or more airflow I think.

These two parts alone won't get you up to where you want but in combination with the race gas and Vortex CDI box might get you there. I would consider buying the pipe too to go with the muffler.
j368
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j368 1/30/2017 5:57pm
1/30/2017 5:57pm
That combo is not gonna get you 4 hp. I run MR12 & a Vortex on my CRF250R. I'd say it's worth 1 - 1.25 hp IMO.
Ktm 5
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Ktm 5 1/30/2017 6:50pm
1/30/2017 6:50pm
Buy a ktm and you'll have your extra hp....lol I would consider head work if you want that much more hp
sparker245
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sparker245 1/30/2017 7:03pm
1/30/2017 7:03pm
Thanks for the responses. Is it necessary to drain MR12 from the tank after each race day?

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Ktm 5
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Ktm 5 1/30/2017 7:18pm
1/30/2017 7:18pm
I use vp4.4 in our bike and when we are done I drain out vp and put in non ethanol gas in tank so fuel pump doesn't dry out
Zycki11
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Zycki11 1/30/2017 7:31pm
1/30/2017 7:31pm
While we are on the subject, what is the cheapest "race gas" for 4 strokes? Been thinking about running better fuel and i have heard higher octane isn't really the best route.
Jterry
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Jterry 1/30/2017 7:57pm
1/30/2017 7:57pm
VP T4 is the cheaper fuel that is better than pump.
Zycki11
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Zycki11 1/30/2017 8:25pm
1/30/2017 8:25pm
Jterry wrote:
VP T4 is the cheaper fuel that is better than pump.
Thanks, any thoughts on if it is good/bad to mix 50/50 with pump?
CarlinoJoeVideo
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CarlinoJoeVideo 1/30/2017 9:29pm
1/30/2017 9:29pm
Call Twisted Development and ask them about a Vortex with their maps. They also have a dual injector kit that will give you more HP. It's all plug and play.
http://td-racing.com/shop/
sesker15
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sesker15 1/31/2017 7:45am
1/31/2017 7:45am
CarlinoJoeVideo wrote:
Call Twisted Development and ask them about a Vortex with their maps. They also have a dual injector kit that will give you more HP. It's...
Call Twisted Development and ask them about a Vortex with their maps. They also have a dual injector kit that will give you more HP. It's all plug and play.
http://td-racing.com/shop/
THIS!
ben5020
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ben5020 1/31/2017 1:27pm
1/31/2017 1:27pm
Gytr head, vortex ignition turns by twisted development should do it
ben5020
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ben5020 1/31/2017 1:28pm
1/31/2017 1:28pm
Gytr head, vortex ignition tuned by twisted development and his second injector kit should do it
j368
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j368 1/31/2017 7:00pm
1/31/2017 7:00pm
sparker245 wrote:
Thanks for the responses. Is it necessary to drain MR12 from the tank after each race day?
No it's not. It's not like the old U4 that you had to.
NeedMoto
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NeedMoto 1/31/2017 8:30pm
1/31/2017 8:30pm
sparker245 wrote:
Need some suggestions about getting a couple more HP out of my 2017 Yamaha YZ250f, preferably without any motor work. Love the power of the bike...
Need some suggestions about getting a couple more HP out of my 2017 Yamaha YZ250f, preferably without any motor work. Love the power of the bike stock, but another four HP or so would be my goal. Currently stock except for a Dr. D slip on exhaust. Have heard that VP MR12 race gas plus a Vortex ignition could produce the HP I'm looking for, but would like some opinions or suggestions. Have an older YZ250f for practice, so this one would only be used on race day....race gas cost would therefore be manageable.
Instead of coasting 100' prior to entrance of corner, and waiting until you've rolled out of the corner 100' before you get on the gas, I'm certain you'll have all the gains you need Whistling (JK...) Evil

See you Wednsday at estreet old timer Tongue
Giygas 2/1/2017 7:26am
2/1/2017 7:26am
sparker245 wrote:
Thanks for the responses. Is it necessary to drain MR12 from the tank after each race day?
I leave u4.4 in my tank constantly. No problems.
sparker245
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sparker245 2/1/2017 4:09pm
2/1/2017 4:09pm
sparker245 wrote:
Need some suggestions about getting a couple more HP out of my 2017 Yamaha YZ250f, preferably without any motor work. Love the power of the bike...
Need some suggestions about getting a couple more HP out of my 2017 Yamaha YZ250f, preferably without any motor work. Love the power of the bike stock, but another four HP or so would be my goal. Currently stock except for a Dr. D slip on exhaust. Have heard that VP MR12 race gas plus a Vortex ignition could produce the HP I'm looking for, but would like some opinions or suggestions. Have an older YZ250f for practice, so this one would only be used on race day....race gas cost would therefore be manageable.
NeedMoto wrote:
Instead of coasting 100' prior to entrance of corner, and waiting until you've rolled out of the corner 100' before you get on the gas, I'm...
Instead of coasting 100' prior to entrance of corner, and waiting until you've rolled out of the corner 100' before you get on the gas, I'm certain you'll have all the gains you need Whistling (JK...) Evil

See you Wednsday at estreet old timer Tongue
Ha, you funny...accurate, but funny. I should have roosted you today when you came around to lap me.
Wade221
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Wade221 2/1/2017 4:38pm
2/1/2017 4:38pm
sparker245 wrote:
Need some suggestions about getting a couple more HP out of my 2017 Yamaha YZ250f, preferably without any motor work. Love the power of the bike...
Need some suggestions about getting a couple more HP out of my 2017 Yamaha YZ250f, preferably without any motor work. Love the power of the bike stock, but another four HP or so would be my goal. Currently stock except for a Dr. D slip on exhaust. Have heard that VP MR12 race gas plus a Vortex ignition could produce the HP I'm looking for, but would like some opinions or suggestions. Have an older YZ250f for practice, so this one would only be used on race day....race gas cost would therefore be manageable.
NeedMoto wrote:
Instead of coasting 100' prior to entrance of corner, and waiting until you've rolled out of the corner 100' before you get on the gas, I'm...
Instead of coasting 100' prior to entrance of corner, and waiting until you've rolled out of the corner 100' before you get on the gas, I'm certain you'll have all the gains you need Whistling (JK...) Evil

See you Wednsday at estreet old timer Tongue
sparker245 wrote:
Ha, you funny...accurate, but funny. I should have roosted you today when you came around to lap me.
How's the layout since the flood? I'm up in Washington at the moment, so haven't gotten to ride any of the REP tracks since the flooding
neysbo
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neysbo 2/1/2017 7:07pm
2/1/2017 7:07pm
I would think you could get your stock ECU remapped as opposed to buying a Vortex , maybe look into VP Pro 6 as it is oxygenated and produces good HP gains when properly mapped.
sparker245
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sparker245 2/1/2017 7:39pm
2/1/2017 7:39pm
NeedMoto wrote:
Instead of coasting 100' prior to entrance of corner, and waiting until you've rolled out of the corner 100' before you get on the gas, I'm...
Instead of coasting 100' prior to entrance of corner, and waiting until you've rolled out of the corner 100' before you get on the gas, I'm certain you'll have all the gains you need Whistling (JK...) Evil

See you Wednsday at estreet old timer Tongue
sparker245 wrote:
Ha, you funny...accurate, but funny. I should have roosted you today when you came around to lap me.
Wade221 wrote:
How's the layout since the flood? I'm up in Washington at the moment, so haven't gotten to ride any of the REP tracks since the flooding
PC has exceptional traction right now. Haven't been to Riverfront since the flood and haven't heard much. The flood actually brought in a bunch of sand to E St. and to a lesser extent MMX. Today at E St. it was deep, deep sand on 90% of the track. Track was tight probably because the low lying areas might have still been wet, so deep sand combined with a relatively tight track made it tough (for me) to stay on top of the sand. I think when Zeb can open up the track a bit more it's gonna be super sweet....just like the E St. of the 70's and 80's....sandy and rough as hell
.

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