2017 250 EXC-F -- any opinions yet?

Discussion in 'Thumpers' started by KnowFear, Feb 12, 2017.

  1. Guoseph

    Guoseph Been here awhile

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    Update:

    We think we fixed it. Moved the ground to a different place on the subframe but still intermittently cut out when warm. But subframe is not warm at all so didn't think that was the ultimate issue. Then put in a new plug (only replaced the boot before) and that seemed to have fixed it. Not sure if the original broken boot arc'ing damaged the spark plug or not but so far it's able to run for 20+ minutes with the fan coming on and off. Will ride around the neighborhood to test and hopefully hit the trails a bit this weekend for a full test.

    Also, what's the consensus on which tail tidy? Sicass? oem-XCW?
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  2. oldschoolsdime92

    oldschoolsdime92 Been here awhile

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    Taco Moto provided me wonderful customer service. I sent him messages on Facebook, and he was more than willing to take time out of his day to chat a bit and answer all of my questions. He certainly is newer to the game, but he has done his research.

    The ktm and husky guy's original's website was sketchy. Selling little black boxes that appear to be home made ect. He currently is selling essentially a velocity stack, that you shove in the intake runner when you remove the reed valve. It would be really interesting to see dyno sheets from a third party dyno vs a sheet he provides
  3. bkoz

    bkoz test

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    I went with OEM only because its was cheaper. But I had to fab light mounts and the harness.

    The Sicass is plug and play.
  4. PDXR650

    PDXR650 Been here awhile

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    Yeah - I think the Sicass is the cleanest solution, it's a pretty easy install as well and has held up great for me.
  5. Guoseph

    Guoseph Been here awhile

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    Update, successfully ran 0.5hr on the street. Did initial oil change and valve check. Then rode a couple hours easy pace at local OHV. No hiccups so far. Really love how nimble this bike feels, power is there when you rev it, but very mellow and tame so not as to not tire you out in the tight stuff.
  6. bkoz

    bkoz test

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    Time for an update on my winter rebuild. But first some riding pics:

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    Attached Files:

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  7. bkoz

    bkoz test

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  8. bkoz

    bkoz test

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  9. bkoz

    bkoz test

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    It didn't take long for my new clutch cover to get some war wounds

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    I am been experimenting with low and straight bars (Pro Taper Steering Damper Low).

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    Absolutely HUGE upgrade. The bike has instantly become a slot car. And technical hill climbs are WAY better. This is a really, really great upgrade for aggressive riding. Getting into the attack position and holding it is much easier. I love these bars!!!!
    But...you have to be willing/able to be in the attack position, on the balls of your feet for most of your riding.

    And I am really enjoying the Vertex high compression piston. It has given the bike a really nice bump up in low end torque that is very nice to have. The engine is almost as good as my '15 YZ250FX was.

    Interestingly @ around 10hrs on the piston I started getting a puff of blue smoke on the first crack of the throttle after start up. Now at just over 20hrs on the piston this has cleared up. Kind of weird.

    Other than that the bike is working well and continues to embarrass most of the 350's and 300 2 strokes that I ride with.

    My YZ250 to WR250 project bike is back on the trails and I expect to ride it more than the KTM for the next little while. I will need to do a YZ250 bush bike vs KTM 250EXCF lap times comparison.
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  10. VTMTcowboy

    VTMTcowboy Been here awhile

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    Beautiful country! Looks like some amazing riding. Thanks for sharing.
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  11. PDXR650

    PDXR650 Been here awhile

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    100% agree with the low bars, I run the exact same Damper Low bars on my 17' 250 EXCF @ 6-4 and guys think I am nuts, but I've always thought low bars feel good....but as you point out, the drawback is they can be really tiring if you are not in that ass back, knees bent, elbows out chest over bar attack position while also being in good riding shape.

    I've tried the Astra bars on my 21 350 XCF, the lowest ones I could get which only have a 20mm rise and they just magnify the pros and cons....although the front of that bike sits a bit higher so bars are probably in a sim position vs my 250 EXCF.

    If I hop on a guys bike with bars taller than stock and/or risers I really struggle, particularly as you point out, on climbs.

    Super underrated platform for sure, I almost bought a 19' Husky FE250s and put on a Euro wiring harness & Vortex to try to make a proper Euro spec FE250 enduro bike....I love these 250's that much. The traction they get is out of this world relative to the bigger bore bikes, very very few hill climbs here in the PNW are limited by HP but rather traction....
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  12. bkoz

    bkoz test

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    I have been riding my bush modded YZ250 a bunch lately. It has stock YZ250FX handlebars on the stock mounts. They actually look fairly similar to the stock KTM bars. I miss my low bars!! I have another set of Protaper Steering Damper Lows on order for it.

    And you are right about traction and the 250F. The little 4 stroke seems to find traction everywhere! My YZ250, not so much. I am pretty sure I am faster on the YZ in certain areas but it is easy to be out of control and losing time.

    Once I get the jetting and suspension sorted on the YZ in plan to do some back to back time tests.
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  13. PDXR650

    PDXR650 Been here awhile

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    Post up once you test.....I bet you'll have similar times on short runs....but I bet the 4t is faster over the long haul since it's easier to ride w/less energy....
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  14. oldschoolsdime92

    oldschoolsdime92 Been here awhile

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    Has anyone added a kickstart? If so do you have a part number? My local KTM dealer claims they are unable to find one.

    I've had multiple variations of issues.

    The first time, I clicked the key on, heard the fuel pump prime, and thumbed the button and nothing. Was able to bump start the bike and ride for the day. Didn't have an issue the rest of the day.

    Replaced battery.

    Second time I was on a dual sport ride in the middle of nowhere. The bike just died. Riding down the trail. Thumb the button and it would fire and die. Shut everything off. Stared at it frustrated. Tried again. fired .No more problems the rest of the day.

    Third time- Stalled the bike a few times in a row. After that it wouldn't turn over. Much like the first time. Let it sit for a few minutes and it fired right up, ran fine the rest of the day.

    Any thoughts?
  15. windblown101

    windblown101 Long timer Supporter

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    It may or may not be the issue but adding a ground wire running from the engine to the battery cured the electrical issues on my '18. The subframe ground that is used on these bikes is notorious for being a weak link and causing all sorts of issues including random no starts. It's common enough that there are ground wire kits in the after market for it.
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  16. bkoz

    bkoz test

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    @windblown101 is correct. @oldschoolsdime92 you most likely have ground wire issues. I ran a #8 (IIRC) wire from the battery - post to one of the starter mount bolts.
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  17. Mikemm

    Mikemm Long timer

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    a situation where the bike fires and dies isn't a no start issue.
  18. oldschoolsdime92

    oldschoolsdime92 Been here awhile

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    that's very true. My bad. Was still on my first cup of coffee when I made the post.
  19. BLZ2DWL

    BLZ2DWL Roustabout Supporter

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  20. StanBo

    StanBo Been here awhile Supporter

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    I am also interested in what any information why there is no option for a kickstart on the 250?
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