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  1. #1
    Nutcase's Avatar
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    V-tech 8400 rmp 15' FX svho

    Hi. Is a valvetrain upgrade "mandatory" if i get a V-tech 8400 rpm upgrade on my bone stock Yamaha FX svho 2015 ?


  2. #2

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    No. You should be good at 8600 and below. I have a friend who is looking to try a bone stock build with an ECU. What speed are you running at 8400?

  3. #3
    Nutcase's Avatar
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    Ok i see. Sorry to ask but are you 100% sure about that ? I dont fancy valveflow.... Anyone else that can confirm ?

  4. #4
    Fat Man, Little Boat Region8Ultra250X's Avatar
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    if your concerned about it, then do it. its a small price to pay for piece of mind. that being said, I have no clue if it will work. if you are planning other mods might as well do it

  5. #5
    hdlefler's Avatar
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    Quote Originally Posted by Nutcase View Post
    Hi. Is a valvetrain upgrade "mandatory" if i get a V-tech 8400 rpm upgrade on my bone stock Yamaha FX svho 2015 ?
    No you do not need it. not that I recommend it but I know guys running 9200-9400 with just retainers

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  7. #6
    Nutcase's Avatar
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    Thanks for info guys. The top rpm on my svho today is 7600ish. i get about 70mph topspeed. If i v-tech tune it to approx 8400-8600 it should be 100% safe ? But due the rpm increasement wil those extra rpm's possibly harm the engine or potentially harm it? Regarding service... Will it still be sufficient to follow the standard service program from my dealer ?

    Last but maybe the most important.
    What can i expect the topspeed to flat out at ? I take it for granted that the low end performance as well at midrange wil increase substantially aswell ?

    Thanks.

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