yz250fx fuel rail

[mv7000]

KTM/HUSKY YOUTUBE has a video on the FX  fuel rail that will take out the jerkiness off idle!

[ckny]

It's fine off idle. People are pussies. 

[GHILL28]

Single cylinder bikes don't have fuel rails...

[mv7000]

25 minutes ago, GHILL28 said:

Single cylinder bikes don't have fuel rails...

If it will make you happy ,We will call it a fuel line!

[Hans Schmid]

I don't see how this is going to help in the on/off jerkiness... When I watched the video, I saw the same 'results' in the 2nd portion of the video as I did in the 1st portion... 

[Shredjim]

On 11/20/2017 at 0:16 PM, ckny said:

It's fine off idle. People are pussies. 

I'm with ckny, the FX is great off idle, i.e. there is no jerkiness!  Another way to put it -  crisp EFI throttle response!   Maybe these guys would rather have a carburetor bog like old generation 4 strokes so the bike has a slow throttle response ??   Too many newbies on this forum now....   Like I have said many times now, learn how to use your clutch and a crisp throttle response is welcome trait of a good EFI bike!

[DrDirt]

So obviously this forum belongs only to people who aren’t newbies.  I always thought it was for the sharing of info, asking advice.  Share your opinion but no reason for your remark about newbies.  BTW I’m sure the fuel injector is fine, that is obviously why yamaha’s off-road team asked this guy to develop a different injector profile.  

[THUMPERRIDER1]

I can share some maps that will make you happy and save you $$$$. Better to spend money on the FX with a FC lowering link, fresh tires, and gas!

[Vintage Not Pimpage]

The FX is smooth as butter coming off the F. You miss the throttle response / power when it's not there !

[THUMPERRIDER1]

6 hours ago, Vintage Not Pimpage said:

The FX is smooth as butter coming off the F. You miss the throttle response / power when it's not there !

The cylinder works 270 Kit and a 50T rear sprocket help!

[ckny]

On 2017-11-22 at 10:45 AM, DrDirt said:

So obviously this forum belongs only to people who aren’t newbies.  I always thought it was for the sharing of info, asking advice.  Share your opinion but no reason for your remark about newbies.  BTW I’m sure the fuel injector is fine, that is obviously why yamaha’s off-road team asked this guy to develop a different injector profile.  

Because you know how all those factory teams out there run stock bikes...

[Shredjim]

On 11/23/2017 at 8:23 AM, THUMPERRIDER1 said:

The cylinder works 270 Kit and a 50T rear sprocket help!

Hey Thumper, please tell us more about the 270 kit?  How much more bark does it provide and where in the rpm curve?  Did you do anything else to the motor?

[THUMPERRIDER1]

On 11/24/2017 at 1:08 PM, Shredjim said:

Hey Thumper, please tell us more about the 270 kit?  How much more bark does it provide and where in the rpm curve?  Did you do anything else to the motor?

Adds noticeable bark low to mid and doesn't seem to affect top end much at all. I used to run 290 kits on the older bikes and they always hurt top end/over-rev. The only other mod I have is an FMF 4.1 slip on. Sections where the bike would not pull 3rd gear are no longer an issue. It's well worth the $500