300sx mods? - Page 7

» Log in

User Name:


Not a member yet?
Register Now!

» Find OEM Parts

» Jobs

» wallpapers

Page 7 of 7 FirstFirst ... 567
Results 61 to 63 of 63

Thread: 300sx mods?

  1. #61
    PWCToday.com Is My Home Away From Home Laserman's Avatar
    Join Date
    Apr 2006
    Orlando, FL 32817

    Re: 300sx mods?

    I'm pretty sure I won't be needing it....

    Did I ever mention that I'm from NY? Just outside Syracuse.

    (Now I'm covered if I need someone up there killed......)

    Last edited by Laserman; 03-26-2010 at 06:33 PM.
    1985 JS 550/750 Stand-up: http://www.pwctoday.com/f72/smileys-...50-114680.html
    1984 JS550 TYPHOON 750 conversion: http://www.pwctoday.com/f72/laserman...ct-186297.html
    1992 Sport Cruiser "Sportscar" Conversion: http://www.pwctoday.com/f72/laserman...-a-173049.html
    Here's a helpfull thread on 550\650 conversions: http://www.pwctoday.com/f72/just-ano...on-133898.html

  2. #62
    I dream skis sportsfreak29's Avatar
    Join Date
    Oct 2011
    Midland, Tx.

    Re: 300sx mods?

    I've heard that there is a 500cc head that will bolt straight up the the 300sx bottom end. Any ideas on this?
    If you're not crashing, then you're not trying!!!

    Ski situation in limbo!

    Special thanks to Chris Newmiller, and Mitchell at M&M Marine!

  3. #63
    Top Dog bandit88's Avatar
    Join Date
    May 2014
    Green Bay WI

    Re: 300sx mods?

    Quote Originally Posted by sportsfreak29 View Post
    I've heard that there is a 500cc head that will bolt straight up the the 300sx bottom end. Any ideas on this?
    Ive never seen one. There were some ramblings about using a KX500 cylinder but that wouldnt work without a LOT of work. Cases would have to be bored, base studs re-arranged, that is if the cases are even large enough. The crank would have to be stroked like 20 some mm. No way to operate the power valves, and having owned a KX500 the power is too peaky and without enough torque for watercraft use, and once you loose the powervalve its even worse. Then you have the issue of the 300 starter clutch that is already weak and probably wouldnt last a day with the larger cylinder. Would also have to block off the crankcase intake. And lots of other crap like an exhaust, cooling routing, etc. Better off sticking a 550 in it.
    -95 750SXI
    -86 440 with PJS800 conversion - http://www.pwctoday.com/showthread.php?t=466927
    -90 TS650
    -91 300SX

Page 7 of 7 FirstFirst ... 567

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Powered by vBadvanced CMPS v4.2.0