14 kx250f engine mods

thorns
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thorns 2/10/2016 10:46am
2/10/2016 10:46am
Okay so prob not worth the $$$ to upgrade the exhaust for now.

Any thoughts on the cams and ecu?
mxb2
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mxb2 2/10/2016 10:49am
2/10/2016 10:49am
Vortex,with full pipe, oxygenated fuel, mapped for it. That bike will rip. Assuming your suspension tires, etc are good to go..
mjr119
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mjr119 2/10/2016 11:01am
2/10/2016 11:01am
My 14 is ported and has stage 2 cams etc. Stock piston. Remapped for race fuel and it is leaps and bounds better than the stock version. More bottom end and slightly more over rev. I can ride it like a mini 450 and lug it around. It's great!

My bike made more HP on the dyno with the stock exhaust but the difference was negligible. So I kept my FMF on there with the stock header. The weight savings and looks of the FMF made me go with it.

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mxb2
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mxb2 2/10/2016 11:23am
2/10/2016 11:23am
mjr119 wrote:
My 14 is ported and has stage 2 cams etc. Stock piston. Remapped for race fuel and it is leaps and bounds better than the stock...
My 14 is ported and has stage 2 cams etc. Stock piston. Remapped for race fuel and it is leaps and bounds better than the stock version. More bottom end and slightly more over rev. I can ride it like a mini 450 and lug it around. It's great!

My bike made more HP on the dyno with the stock exhaust but the difference was negligible. So I kept my FMF on there with the stock header. The weight savings and looks of the FMF made me go with it.
X2,_stock pipe is really good, fmf lighter, looks better imo. Especially the ti.
thorns
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thorns 2/10/2016 11:42am
2/10/2016 11:42am
Awesome, thanks for the replies. Sounds like it should go very well without loosing too much bottom end grunt.
mxb2
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mxb2 2/10/2016 12:10pm
2/10/2016 12:10pm
Make sure the ecu is mapped for the fuel you use,or your wasting $$ and performance.
thorns
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thorns 2/10/2016 5:37pm
2/10/2016 5:37pm
The vortex comes with ten maps from my reading all pre programmed and have been told there is a hot cams map plugged into it.

A non engine related question, looking on racetech, it seems to suggest the factory fork springs are very stiff. Entered my weight at 230lbs, and it tells me I should go down a rate from the standard 1.0kg spring. Anyone know if this would sound right? be a nice change if it was the case.

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