Page 1 of 2 1 2 LastLast
Results 1 to 10 of 13
  1. #1
    yankejr's Avatar
    Join Date
    May 2012
    Location
    Ocala, Fl
    Posts
    24
    +1
    1

    xl 1200 ltd, what else should I do

    Hello, I have just rebuilt my XLT, here is what I have done

    SBT cylinder exchange kit.
    Stock SBT impeller
    SBT wear ring and housing
    Intermediate bearing
    Mikuni carb kits
    120 mains,1 1/2 turns high speed, 110 pilot jets, 1 turn low speed, 1.5 n/s 95 gr spring
    Removed air plenum and tube, modified air box by drilling it.
    Installed oil pump block off, running 32:1, yamalube
    Inspected and cleaned power valves, replaced one, using stock linkage.
    Built my own free flow kit using stock exhaust hose and some ss pipe (submersible well pump casing)
    D plate and chip.
    I think that is it.

    After break in I have 120 psi on all 3 cyl.
    Machine seems to be running great, throttle is pretty crisp.
    Got 57.9mph on gps.

    My questions are
    Is this speed what I should be getting with this setup?
    Is there any other simple mods I should do to get a marked improvement, such as plates, grates, props?

    Thanks in advance for any advice.


  2. #2
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
    Join Date
    Nov 2005
    Posts
    6,194
    +1
    535
    Quote Originally Posted by yankejr View Post
    Hello, I have just rebuilt my XLT, here is what I have done

    SBT cylinder exchange kit.
    Stock SBT impeller
    SBT wear ring and housing
    Intermediate bearing
    Mikuni carb kits
    120 mains,1 1/2 turns high speed, 110 pilot jets, 1 turn low speed, 1.5 n/s 95 gr spring
    Removed air plenum and tube, modified air box by drilling it.
    Installed oil pump block off, running 32:1, yamalube
    Inspected and cleaned power valves, replaced one, using stock linkage.
    Built my own free flow kit using stock exhaust hose and some ss pipe (submersible well pump casing)
    D plate and chip.
    I think that is it.

    After break in I have 120 psi on all 3 cyl.
    Machine seems to be running great, throttle is pretty crisp.
    Got 57.9mph on gps.

    My questions are
    Is this speed what I should be getting with this setup?
    Is there any other simple mods I should do to get a marked improvement, such as plates, grates, props?

    Thanks in advance for any advice.
    With sleeved cylinder that is about max, You will not get the same speed from sleeves like you will with the stock nickel sil

  3. #3
    yankejr's Avatar
    Join Date
    May 2012
    Location
    Ocala, Fl
    Posts
    24
    +1
    1
    What causes that, more friction?

  4. #4
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
    Join Date
    Nov 2005
    Posts
    6,194
    +1
    535
    Quote Originally Posted by yankejr View Post
    What causes that, more friction?
    the sleeves never line up perfect to the cylinder ports.

  5. #5
    yankejr's Avatar
    Join Date
    May 2012
    Location
    Ocala, Fl
    Posts
    24
    +1
    1
    Yeh that makes sense. But I'm not looking to build a 70 mph ski just a good reliable one with a little better than stock performance.

  6. #6

    Join Date
    Aug 2006
    Location
    Indiana
    Posts
    1,274
    +1
    81
    I would remove the fuel sending unit/fuel pickup unit from the tank and check that the length of the reserve fuel line is not so long as to touch the bottom of the sending unit. It will touch the bottom plate and restrict fuel flow when on reserve. I have found this problem on 6 units I have worked on.

  7. #7

    Join Date
    Nov 2009
    Location
    NC
    Posts
    782
    +1
    29
    You're on the right track.
    Try a grate, then a plate, then an impellor. If you're at 58 mph now, those should get you 60-62.

  8. #8
    yankejr's Avatar
    Join Date
    May 2012
    Location
    Ocala, Fl
    Posts
    24
    +1
    1
    Quote Originally Posted by LT1GMC View Post
    I would remove the fuel sending unit/fuel pickup unit from the tank and check that the length of the reserve fuel line is not so long as to touch the bottom of the sending unit. It will touch the bottom plate and restrict fuel flow when on reserve. I have found this problem on 6 units I have worked on.
    Unfortunately, I have already found this out the hard way. On my ski the Fuel on and reserve lines were backwards, so with fuel valve in on position it was sucking fuel from reserve line. It also had the long reserve tube that was hitting the baffle on the end of the tube, and stopping up. If I had only figured that one out before sticking a piston.

    The way I found the problem was put an outboard primer bulb between the fuel supply and return at the carb, when pumping the bulb, fuel should flow rapidly, through the fuel filter, if it doesnt there is a restriction.

  9. #9

    Yamaha xl 1200 pump stuck

    HI: I just read your post from 5/18/2012 while searching for info on my problem. Have a 98 XL 1200 can't get pump off. Liner is binding on the impeller.

    You mentioned in your post that you cut the shaft tube...where exactly did you cut it??

    Thanks!

    [email protected]









    Quote Originally Posted by yankejr View Post
    Hello, I have just rebuilt my XLT, here is what I have done

    SBT cylinder exchange kit.
    Stock SBT impeller
    SBT wear ring and housing
    Intermediate bearing
    Mikuni carb kits
    120 mains,1 1/2 turns high speed, 110 pilot jets, 1 turn low speed, 1.5 n/s 95 gr spring
    Removed air plenum and tube, modified air box by drilling it.
    Installed oil pump block off, running 32:1, yamalube
    Inspected and cleaned power valves, replaced one, using stock linkage.
    Built my own free flow kit using stock exhaust hose and some ss pipe (submersible well pump casing)
    D plate and chip.
    I think that is it.

    After break in I have 120 psi on all 3 cyl.
    Machine seems to be running great, throttle is pretty crisp.
    Got 57.9mph on gps.

    My questions are
    Is this speed what I should be getting with this setup?
    Is there any other simple mods I should do to get a marked improvement, such as plates, grates, props?

    Thanks in advance for any advice.

  10. #10
    showmepro1200's Avatar
    Join Date
    Sep 2006
    Location
    Jefferson City MO (Ride at Lake of the Ozarks)
    Posts
    524
    +1
    40
    Stevmotox - I think he's referring to the "radiator hose" type connection between the rearside of the midwall and the point the drive shaft goes out the hull to the intake tunnel. The shaft is in there. Seems kinda last-resort though, cutting the shaft. Unless you know its bad and plan on replacing it anyway.

    If you have the motor out or otherwise have enough room to do so, can you take off (unscrew) the midshaft coupler and try to drive a large (1/2" or so) rod down the midshaft hole from inside? That could break it free maybe - just a thought.

Page 1 of 2 1 2 LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Pulling the head for valves -- what else should I do?
    By Ferrari Steve in forum 4-Tec Performance
    Replies: 22
    Last Post: 07-09-2014, 01:37 PM
  2. Need new pistons what else should i do?
    By mikestyle in forum 4-Tec Performance
    Replies: 6
    Last Post: 06-25-2012, 10:08 PM
  3. What else should I do to my 15f?
    By flnz400 in forum Kawasaki Open Discussion
    Replies: 15
    Last Post: 11-02-2011, 11:00 PM
  4. xl 1200 ltd, engine comes out, what to look for
    By waterworld in forum Yamaha PWC Performance (2-stroke)
    Replies: 2
    Last Post: 05-29-2011, 09:15 AM
  5. What should a 1999 XL 1200 ltd do with...
    By stlouisramsfan in forum Yamaha PWC Performance (2-stroke)
    Replies: 8
    Last Post: 08-02-2008, 12:47 PM

Posting Permissions

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