Vitpilen from France (Savoie)


Viewing 15 posts - 1 through 15 (of 21 total)
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  • #29006
    Jersen
    Participant

    Hi everybody,

    Let me introduce my new vitpilen 2019 model just get at the end of confinement after having sold my 701 SM 2017.

    there’s a pretty equipment :

    – Complete titanium exhaust (including tailormade line big diameter 60 mm)

    – PC5

    – Dyno shifter

    – big carbon air intake (I made it – JERSEN)

    – 93 hp on bench

    – 155 kg with all fluids

    – 400 km – still I have to get smooth until the 1st 1K kms

    Coming from 701 SM, it’s really more handy in all the beautiful curvy roads around the backcountry.

    I will change the plate holder for a tail tidy, rims (KTM duke 4 from my 701 SM) that will be black painted and probably the sprocket (-1 tooth) to get something more racing according to the amazing engine.

     

    😀

    #29034
    superfirmin
    Participant

    Hi,

    Nice job !
    I am considering to replace the decat by a full line just like yours without the muffler (already have the Akra) but doesn’t want to loose the look that give the two black parts under the belly. Since you seem to know how to make parts, don’t you have a solution for that ?

    And can you tell me if you lost torque after removing the decat ?

     

     

     

    #29035
    Jersen
    Participant

    Thanks Superfirmin

    I’ve already made a bcomposite belly pan for my vit.

    Need to be painted.

    I’ll post some pics.

    I can’t tell you about the torque as the bike is fully prepared with pc5 …🤷🏻‍♂️

    #29036
    Max Kool
    Participant

    So what changed are made to the engine’s internals to get 93hp? That’s an amazing number!

    #29044
    karai
    Participant

    Top! aussi curieux de savoir comment tu es arrivé a sortir 93cv du bloc!

    #29045
    Jersen
    Participant

    Yes I know – incredible

    the engine is full stock…. : just the titanium exhaust line, the KN filter, the big air intake AND the PC5

    –> settings on the bench without ignition advance, completely safe for the engine.

    81hp on rear wheel makes around 93hp engine

    #29046
    Jersen
    Participant

    après sachant que le bloc est donné (constructeur) à 75 hp full origine, avec tout le matos dessus, 93 hp c’est un beau chiffre mais ça reste dans la fourchette de ce qui peut se faire avec ce genre d’équipement….

    quand je fournis la cartographie moteur à mes clients pour leur moteur 990 KTM pour aller avec ma boite à air JERSEN, certains moteurs passent de 115hp à 134 hp. et ça juste en adaptant correctement boite à air/injection/échappement

    et toujours sans avance à l’allumage pour conserver la santé et la fiabilité du moteur

    donc je suis super content mais pratiquement je suis pas si surpris que ça 😉

    #29050
    Nampus
    Participant

    Very impressive!

    Why did you use a dynojet quickshifter when the bike comes with a quickshifter from the factory?

    #29052
    Jersen
    Participant

    I’ve bought with the dyno shifter from the pilot I did the composite parts.

    The Factory one you Can not adjust settings.

    The dyno one yes. And shifting is really much quickier than the Factory one.

    #29054
    Max Kool
    Participant

    You made great gains, but it’s not as dramatic as you suggest. A stock Vitpilen 701 produces around 70-75 hp at the real wheel (depending on which dyno you use).

    example: https://www.youtube.com/watch?v=5HeI0bQGdWE

    according to you own math a stock bike produces 84hp at the crank (which is theoretical anyway, I got no idea where your 15% loss comes from)

    #29065
    superfirmin
    Participant

    Ok I understand.
    I am asking that because it is a known fact that on some bikes you can loose torque after removing the catalyser. Since I prefer torque over power, and even if I want to loose weight, I would prefer to be sure before decat the bike.

    Thank’s anyway and I can’t wait to see your solution to hide the belly pipe 😉

    #29069
    Jersen
    Participant

    as you also see in this video :

    the cutt-off time for up shifting is really shorter with the dyno shifter

    #29067
    Jersen
    Participant

    belly pan fab

    #29066
    Jersen
    Participant

    @ max kool

    No no, not at all

    when you have 75 hp at the rear wheel you have less at the crank due to losses given by chain, gearbox for the essential.

     

    @ superfirmin

    Yes I prefer torque as power too !

    but the fact here is that the titanium line is not the same diamter as the original (50 mm diam). le Titanium line is 60 mm diam which is very important for a single cylinder.

    see below the vitpilen bellypan

    I will show you the fabrication and installation later 😉

    #29077
    Max Kool
    Participant

    @jersen “when you have 75 hp at the rear wheel you have less at the crank due to losses given by chain, gearbox for the essential.”

    It doesn’t work like that. If you have 75hp at the rear wheel you have MORE at the crank. The rear wheel number is after all losses have been subtracted. But anyway, hp at the crank doesn’t matter, it’s what it puts down at the rear wheel.

    And 81hp is a nice number.

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