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frankdecrosser

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About frankdecrosser

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    TT Silver Member

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  • Gender
    Male
  • Location
    Netherlands
  • Interests
    Motocross, Street&track racing on my Yamaha R1, Mountainbiking

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  1. KXF450 2018. After almost 40hrs installed new clutch plates because oil was more black with grey-ish mist. First installed fiber plate was pitch black indicating clutch slip. With new OEM fiber plates installed (steel plates where not colored) oil has same contamination after 2 hrs of mx. (used to change oil not earlier then 3-4 hrs and it would still come out relatively clean) Plates look good after disassembly, hub and basket are in good condition, no notching, only small signs of wear, don't feel any clutch slipage. Installed 2 thicker steel plates first to no avail, and washers under springs thereafter. (raced it today, still have to check the oil) Any other ideas what could cause this grey-ish mist in oil? Thanks for any suggestion! Frank
  2. frankdecrosser

    450 overheating prevention

    Cover your fueltank with reflective/isolating material to prevent the fuel from heating up. Solved my issues with overheating
  3. frankdecrosser

    Leaking oil

    Perform a compression test first if you have access to the proper equipment
  4. frankdecrosser

    HELP kx450f 2017 issues

    Experienced similar once when I stalled my KXF450 18 in a corner, couldn't get the kickstarter down. Put it in gear and rolled bike a bit and was able to kick bike again. weird.
  5. frankdecrosser

    2018 KXF450 loses power after few laps

    I sure think it does, tried some simple very thin aluminium tape first, but this didn't hold very well, probably due to gasoline vapours because I remember tank stickers on Suzuki's in the early 80's coming loose because of this. Installed thicker heat shielding from a specialized firm now, but it does not seem to be a big improvement over the alu tape.
  6. frankdecrosser

    Fork Issue with 2018 YZ450F

    I had similar issues (manuf fault) with other brand new bikes (Honda, Kawasaki) and never got any compensation from dealer or factory whatsoever. They always hide behind the no warranty statement, or rider/mechanic fault.
  7. As a KXF450 (2018) owner this is good stuff as I was considering switching to a YZF450 after summer because of them having more horsepower. See if I can test ride one first then..
  8. frankdecrosser

    2016 KX450F clutch not fully disengaging

    So if not grooved this basically means there is not enough lift of the pressure plate. Assuming cable/levers are adjusted properly, and no items such as washer on thrust bearing left uninstalled I would check total plates package thickness if not OEM. Center nut of hub is tight?
  9. frankdecrosser

    2018 KXF450 loses power after few laps

    Tried reflective foil under the tank this weekend in fairly hot ambient temps, and your solution seems to work, I noticed no loss of power. Although two tracks I went were not ultra loam sand, difference is definately noticable, best tip I had on TT so far, thanks so much!
  10. frankdecrosser

    Not shifting into gear good.

    Not too bad as long as you upshift firmly, but it's mx and in the heat of a race, or even training this is not always possible. In my experience, with a Honda CRF450 it's easy to shift between gears. (even when new, I did it) Lower pic looks like a somewhat more worn gear dog, replace it while your at it.
  11. frankdecrosser

    2018 KXF450 loses power after few laps

    Valid comment, I was thinking in the same direction, but also wondering if -in case muffler is somewhat restrictive- engine heat could gradually build up to a degree that it becomes noticable. I hate to waste money on an aftermarket exhaust and therefore I covered bottom of tank with reflective tape first as advised. Will let you know if this works.
  12. frankdecrosser

    2018 KXF450 loses power after few laps

    Really?? Did you experience this first hand? Anyway I will give it a try as this would be an easy/cheap fix. Can I rule out the OEM exhaust front pipe/muffler as being restrictive, as I only see a few "small wings" in the perforated core to restrict noise? Thanks for your suggestions!
  13. frankdecrosser

    2018 KXF450 loses power after few laps

    I am convinced motor is getting a bit too hot. Mapping is adjusted for more fuel. Could OEM exhaust be too restrictive maybe?
  14. frankdecrosser

    Taming a KX450f

    I stand corrected regarding the heavier flywheel. :-) Indeed I never tried one, because acc laws of physics accelerating a heavier rotating mass consumes more energy, resulting in slower revving, and I want as much power as I can get accelerating from corners in sandy conditions, but then again, I guess that is also what supercrossers want so my reasoning must be off?
  15. frankdecrosser

    Taming a KX450f

    I never understood why anyone would want to detune a bike. Turn the throttle for just the amount of pull you want, easy. You can try the different couplers and see wich one you prefer. Or you can get the ecu remapped. I have a 2018 450 and I think the power is far from arm stretching. (54yrs old)
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