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Ideal jetting for PWK 28

Discussion in 'Modifications and Projects' started by tan keng lee, Sep 15, 2009.

  1. Hi guys

    Need some help here.

    I will be fitting a Keihin PWK28 carb ( flat slide) to replace the PE 28 carb ( round slide) on my NSR150sp.

    What is the ideal main and pilot jet jet sizes I should use?

    How many turns of the ait screw should I make?

    The bike is running on Denso IW24 Iridium plug, K&N filter with air-box attached and does not have any modification to it's exhaust.

    Primary sprocket drive 15
    Seconadry sprocket drive 42

    I will need good low and middle end power with good top end speed up to 160 km/hr at 6th gear.

  2. hey mate the thing is jetting is really very circumstantial, as no one is going to make recomendations because its not something u can guess just i cant remember if the pwk is a power jet or not, power jet carbs usually run smaller mains but basically it will be close to what u are already running ,,just start a few sizes biger then come down ...do a serch for 2 stroke jetting there are heaps of info on techniques for jetting u will probably find the stock way it has been set up will be the closet to acheive what u want..i had a mate with one had a bit of work done made lil difference to that bike he had a chamber and porting..mostly all u will do is move the power around..