17 YZ250F Aftermarket exhaust maps

mxrider116
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mxrider116
Edited Date/Time 10/17/2022 5:40pm
Has anyone found any GYTR tuner maps for the aftermarket exhaust? all the maps listed are with stock exhaust. Havent been able to track any down anywhere.
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walent215
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walent215 3/19/2018 6:44pm
3/19/2018 6:44pm


My son just rode today at milestone and tested a few maps in his 16 yz250f. He ended up with the gytr fmf map. Had to add +2 across the board on fuel side as it was very lean ( popping). He runs u4.4, stock exhaust, stock gearing . Motor has flat top valves, williamsmotorwerx cams and head was cut .01.
Jonah Davis
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Jonah Davis 6/4/2021 7:47pm
6/4/2021 7:47pm
mxrider116 wrote:
Has anyone found any GYTR tuner maps for the aftermarket exhaust? all the maps listed are with stock exhaust. Havent been able to track any down...
Has anyone found any GYTR tuner maps for the aftermarket exhaust? all the maps listed are with stock exhaust. Havent been able to track any down anywhere.








1
mxrider116
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mxrider116 10/11/2022 12:12pm
10/11/2022 12:12pm
mxrider116 wrote:
Has anyone found any GYTR tuner maps for the aftermarket exhaust? all the maps listed are with stock exhaust. Havent been able to track any down...
Has anyone found any GYTR tuner maps for the aftermarket exhaust? all the maps listed are with stock exhaust. Havent been able to track any down anywhere.
Jonah Davis wrote:
[img]https://p.vitalmx.com/photos/forums/2021/06/04/496471/s1200_map_pic_1.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496468/s1200_map_pic_2.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496466/s1200_map_pic_3.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496465/s1200_map_pic_4.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496467/s1200_map_pic_5.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496464/s1200_YZ_map_1.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496469/s1200_YZ_map_2.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496470/s1200_YZ_map_3.jpg[/img]








Hey Jonah,

the " Hit like a mac truck" which do you prefer?
I was trying to get Keefer map but he doesnt have any for that year.
1
Jonah Davis
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Jonah Davis 10/17/2022 5:44pm
10/17/2022 5:44pm
mxrider116 wrote:
Has anyone found any GYTR tuner maps for the aftermarket exhaust? all the maps listed are with stock exhaust. Havent been able to track any down...
Has anyone found any GYTR tuner maps for the aftermarket exhaust? all the maps listed are with stock exhaust. Havent been able to track any down anywhere.
Jonah Davis wrote:
[img]https://p.vitalmx.com/photos/forums/2021/06/04/496471/s1200_map_pic_1.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496468/s1200_map_pic_2.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496466/s1200_map_pic_3.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496465/s1200_map_pic_4.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496467/s1200_map_pic_5.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496464/s1200_YZ_map_1.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496469/s1200_YZ_map_2.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/04/496470/s1200_YZ_map_3.jpg[/img]








mxrider116 wrote:
Hey Jonah, the " Hit like a mac truck" which do you prefer? I was trying to get Keefer map but he doesnt have any for...
Hey Jonah,

the " Hit like a mac truck" which do you prefer?
I was trying to get Keefer map but he doesnt have any for that year.
Map 4 or "Base tune - GYTR by FMF Aftermarket Exhaust is the "Hot Tune" referred to in some other's posts. That is the best all around map I have used with my full FMF system (powerbomb and 4.1). The "Hit like a mack-truck" tunes (8 and 9) are based of the "Hot tune" were I leaned out fuel across the board and retarded timing. Not the smoothest map, but still a decent one to try for fun on really loomy days. To answer your question on which "Mack" tune I would say 8 worked better (I had different names for them a while ago but I must have made a mistake in copy and pasting them.

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mxrider116
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mxrider116 10/17/2022 6:28pm
10/17/2022 6:28pm
Jonah Davis wrote:
Map 4 or "Base tune - GYTR by FMF Aftermarket Exhaust is the "Hot Tune" referred to in some other's posts. That is the best all...
Map 4 or "Base tune - GYTR by FMF Aftermarket Exhaust is the "Hot Tune" referred to in some other's posts. That is the best all around map I have used with my full FMF system (powerbomb and 4.1). The "Hit like a mack-truck" tunes (8 and 9) are based of the "Hot tune" were I leaned out fuel across the board and retarded timing. Not the smoothest map, but still a decent one to try for fun on really loomy days. To answer your question on which "Mack" tune I would say 8 worked better (I had different names for them a while ago but I must have made a mistake in copy and pasting them.
Im gonna give that base tune a try. Thanks for the info. I really appreciate it!

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