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  1. #31
    DanSVHO's Avatar
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    Can anyone confirm the size of the fz Venturi nozzle diameter? I have the extended smaller nozzle from Dean now which is 83mm I believe. Im wondering if I can keep
    my pitch the same without hurting anything just to test.

    https://deansteam.com/products/yamaha-svho-venturi-nozzle-modification?variant=31936918618201


  2. #32
    2014 and later FZR SVHO nozzles are a 85mm 3degree and pre-SVHO FZR nozzles is 83mm 5 degree

  3. #33
    DanSVHO's Avatar
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    perfect. Thanks for that. I ordered a 2016 fzr nozzle so its 85mm 3 degree. I wonder how much that will raise my rpm if it don’t touch the prop? My current nozzle is 83mm. What are the factory specs on 2019+ Fx nozzle?
    Quote Originally Posted by ;3108335
    2014 and later FZR SVHO nozzles are a 85mm
    3degree and pre-SVHO FZR nozzles is 83mm 5 degree

  4. #34
    Quote Originally Posted by DanSVHO View Post
    perfect. Thanks for that. I ordered a 2016 fzr nozzle so its 85mm 3 degree. I wonder how much that will raise my rpm if it don’t touch the prop? My current nozzle is 83mm. What are the factory specs on 2019+ Fx nozzle?
    “ Typically “ 83mm to 85mm add 100rpms and a little more speed.FX nozzles are 87mm and 150-200rpms but you dont go any faster or start slowing down a little.These are just some generalizations and can vary.Just make one change at a time and keep a record of weather/speed/rpms.Its cooling down now in Florida so speeds are going to be higher no matter what.You really need similar weather to your previous runs to have any accurate data

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  6. #35
    DanSVHO's Avatar
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    Ok. Thanks man! Ill leave my prop as is then and I should see 9400 ish rpm.

  7. #36
    DanSVHO's Avatar
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    In case someone is in the same situation. I switched to the newer FZ nozzle that’s 85mm and it has virtually eliminated the sensation that I was experiencing. The hole shot is waaay better and the mid and top end fees the same. I can tell the RPMs went up a bit due to the higher sounding revs. But I cannot tell you the exact RPMs because it was very choppy out when I was doing some pulls. My current tech doesn’t refresh fast enough so you have to hold down the throttle for at least five seconds for it to read a maximum RPM. I just ordered a pet tach because I’m tired of that ha ha. Wondering if I gain any speed. I will test again on the lake shortly but I’m happy with the low end now and the sensation of it bogging down or struggling out of the hole is gone

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