Page 1 of 5 1 2 3 ... LastLast
Results 1 to 10 of 50
  1. #1
    SvrdRam's Avatar
    Join Date
    Apr 2008
    Location
    Utica, Mi
    Posts
    267

    Jetting a non PV 1200

    hey guys, im sure this has been covered before but i couldnt find what i was looking for. Anyways in a newbie in the jet ski world but been involved in quad and dirt bikes my whole life and i must say these watercraft carbs throw me for a loop. Heres what ive got. I have a 98 gp1200 ported cases and cylinders, riva head 41cc with triple pickups, VF3 reeds, reed stuffers, a Red spacer?? and stock Raider exhaust. I jetting that was in the ski is 137.5, 100, 35 and a 2.5 seat gold spring?? Everything ive worked on has had slides with there needles so im lost.
    Last edited by SvrdRam; 05-15-2009 at 07:12 PM.


  2. #2
    Mpeavler's Avatar
    Join Date
    Dec 2005
    Location
    Anderson, Indiana
    Posts
    5,155
    +1
    170
    Quote Originally Posted by SvrdRam View Post
    hey guys, im sure this has been covered before but i couldnt find what i was looking for. Anyways in a newbie in the jet ski world but been involved in quad and dirt bikes my whole life and i must say these watercraft carbs throw me for a loop. Heres what ive got. I have a 98 gp1200 ported cases and cylinders, riva head 41cc with triple pickups and stock exhaust. I jetting that was in the ski is 137.5, 100, 35 and a 2.5 seat gold spring?? Everything ive worked on has had slides with there needles so im lost.

    137.5 likely are your mains
    100 pilots
    2.5 N/S
    Gold needles are 115 gram springs


    Not sure what your asking for?

  3. #3

  4. #4
    SvrdRam's Avatar
    Join Date
    Apr 2008
    Location
    Utica, Mi
    Posts
    267
    well the jetting was for when the previous owner had his triples on it. I bought it with a bad top end and no exhaust. Just want to see if i should make any changes with it before i throw the carbs back on.

    so the 35 should be the starting jet like on sleds?

  5. #5
    Old Ski Insanity w/rpm500's Avatar
    Join Date
    Aug 2005
    Location
    Crystal River Fl
    Posts
    2,208
    98 gp1200 normaly used different(lower) specs but with your porting and such it was raised across the board.. they sound close, but let the 1200 members chime in on this!!needle and spring sound a bit large thou for a single pipe motor..(staying single pipe?)

  6. #6
    SvrdRam's Avatar
    Join Date
    Apr 2008
    Location
    Utica, Mi
    Posts
    267
    yea, tried to find some triples for it but no luck...picked up a raider exhaust for it since i heard that there stinger had a better design...

  7. #7
    Mpeavler's Avatar
    Join Date
    Dec 2005
    Location
    Anderson, Indiana
    Posts
    5,155
    +1
    170
    Im not sure how close we are but I'm working on jetting an running

    110 pilots
    120 mains
    2.0 N/S
    115 gram springs

    M

  8. #8
    jdog800's Avatar
    Join Date
    Feb 2007
    Location
    Alexandria L.A.
    Posts
    812
    Im runnig
    50MM BRM carbs
    115p
    135m
    2.5
    95g spring

  9. #9
    Mpeavler's Avatar
    Join Date
    Dec 2005
    Location
    Anderson, Indiana
    Posts
    5,155
    +1
    170
    Wow Jdog...that jetting is working good for you? I'm running 46's and that is one big ole main jet!!

    My old raider I had ran like 95 pilots with 150-155 mains...I thought those were monsters!

    M

  10. #10
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    Location
    United States
    Posts
    11,875
    +1
    30
    I am running 100pilot 135 main 1.5 N&S and Gold spring on my stock 65U shaved head only.

    I plan on running 110 pilot 135 main and 1.5 Gold spring on my mildly ported GP1200 will see how this goes probably fat in the lows.

    The bigger needle and seats will cause dribling problems in these motors, unless you need them to transition lower I would stay away from anything bigger than the 1.5's they will flow all the fuel you can ever possibly want from the carbs.

Page 1 of 5 1 2 3 ... LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. non-PV 1200 rpm problems
    By toyterrific in forum Yamaha Old School Skis
    Replies: 10
    Last Post: 07-09-2011, 10:20 AM
  2. non-pv 1200 carb base plate thickness does it make any difference?
    By yama-doo in forum Yamaha Open Discussion
    Replies: 8
    Last Post: 06-30-2010, 06:00 PM
  3. WTB: Boyesen RAD valves for a non pv 1200
    By krispaintballz in forum Yamaha Classifieds
    Replies: 2
    Last Post: 10-14-2008, 06:57 PM
  4. WTB: Sidedraft intake manifold yamaha NON PV 1200/1100 motor
    By blasterboy1980 in forum Yamaha Classifieds
    Replies: 0
    Last Post: 10-08-2008, 08:19 AM
  5. WTB Stock non pv 1200 head
    By jctmotorsports in forum Yamaha Classifieds
    Replies: 0
    Last Post: 07-04-2008, 10:39 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
  •