Results 1 to 1 of 1
  1. #1
    M@_'s Avatar
    Join Date
    Feb 2015
    Location
    Springfield MO
    Posts
    16
    +1
    2

    65u Research Project

    Hello. This is a great forum. I'm trying to put together some information on the Yamaha 65u 1200cc cylinder two cycle marine power plant.

    I've put together some general information over the past few days. If you have a chance, please let me know if I have everything correct. I'm missing the Factory Service Manual carb setting for several applications. If you have a manual it would be great to get those filled in.

    Also, I've participated in community tuning projects involving a collection of engine and carburetor specifications. If you're interested in contributing, post your setup. I'll put together a spreadsheet that might empirically relate jetting to power/setup.

    65u Essential Info:

    Engine Specifications:
    Bore: 84mm
    Stroke: 68mm
    Cast Iron Sleeve
    Leak Down: http://www.greenhulk.net/forums/show...=1#post1906546

    Case Porting:
    http://www.greenhulk.net/forums/showthread.php?t=15091


    Carburetor: Super BN 44mm
    Manuals http://www.mikuni.com/fs-manuals.html

    Rebuild: http://www.greenhulk.net/forums/show...hlight=smlaker

    Settings:
    Model Low Needle (Turns) Pilot Jet # Main Jet # High Needle (Turns) Valve Size (mm) Spring (g) Pop Pressure (psi)
    GP1200 1 1/4 (1, 2)
    1 1/8 (3)
    100 (1)
    95 (2)
    97.3 (3)
    135 1/2 (1, 3)
    7/8 (2)
    1.2 95 65-70
    XL1200
    Exciter 1.2 95
    SUV
    LS2000
    LX2000
    1 3/4 (1, 3)
    1 (2)
    1.2 95
    AR210
    LX210
    1.2 95
    Famous Recipe 100 135 1.5 115

    Fuel Pump Pressure Relief "Drilled Return" mod:
    http://www.greenhulk.net/forums/showthread.php?t=177671

    How to Tune:
    http://www.greenhulk.net/forums/showthread.php?t=46316

    T-Handle Mod:
    http://www.greenhulk.net/forums/showthread.php?t=144929

    Popoff Pressure Info:
    http://www.greenhulk.net/forums/showthread.php?t=54706


    Oil System:
    Secure Oil Lines: http://www.greenhulk.net/forums/show...4853&highlight=


    Build Threads:
    Metal4130: http://www.greenhulk.net/forums/showthread.php?t=46316

    Krispaintballz: http://www.greenhulk.net/forums/showthread.php?t=56157

    Cutlass: http://www.greenhulk.net/forums/showthread.php?t=144654

    JonnyB: http://www.greenhulk.net/forums/showthread.php?t=81157


    Applications Powered By 65u:
    GP1200 1997 – 1999
    http://www.greenhulk.net/forums/showthread.php?t=221791
    XL1200 1998

    Exciter 1998 – 1999

    SUV 1999 – 2004

    LS2000 1999 – 2003

    LX2000 2002

    AR210 2003 – 2005

    LX210 2003 – 2005


    Thanks for looking,
    Matt
    Last edited by [email protected]_; 03-24-2015 at 07:46 AM. Reason: Correction


Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Fed. Income Tax - School Project help :)
    By Shibby1485 in forum Open Discussion
    Replies: 18
    Last Post: 02-13-2015, 09:09 PM
  2. GP1200 65U case porting project
    By OsideBill in forum Yamaha Old School Skis
    Replies: 114
    Last Post: 01-19-2009, 03:52 PM
  3. Winter Project 65U GP1200
    By bainer1290 in forum Yamaha Old School Skis
    Replies: 214
    Last Post: 03-13-2007, 11:31 AM
  4. WTB Throttle Body for project
    By 1 FAST VE in forum 4-Tec Performance
    Replies: 2
    Last Post: 08-18-2005, 10:45 AM
  5. TOWING I did some research
    By CRAZEDRXP in forum 4-Tec Performance
    Replies: 13
    Last Post: 06-01-2005, 11:32 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •