Results 1 to 4 of 4

Thread: Fuji re-carb?

  1. #1

    Join Date
    Mar 2011
    Location
    Wichita, KS
    Posts
    33

    Fuji re-carb?

    Does anybody have experience with carburater mods on the 650/750/780 fuji engines? I have a 94 SL750 and am curious about replacing the 3 Minkuni with a single carb. Has anybody tried? I know I would have to fab a manifold. Any other thoughts?


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,330
    +1
    31
    Better be a REALLY big carb.

    3 X 38mm = 114mm

  3. #3

    Join Date
    Mar 2011
    Location
    Wichita, KS
    Posts
    33
    Maybe not quite THAT big, since the throat area equals the radius squared times pi

    A = r X r X pi = 19 X 19 X 3.1415 = 1134 sq mm

    so 3A = 3402 sq mm

    so theoretically a 66 mm carb has 3 times the throat area of a 38 mm carb:

    A = 33 X 33 X 3.1415 = 3421 sq mm

  4. #4
    Banned User
    Join Date
    Jun 2010
    Location
    Milwaukee WI
    Posts
    16,708
    +1
    1,324
    Since each carb is tuned to each cylinder, I don't think this would be a good idea. you would have to tune it to the cylinder that requires the richest mixture, and be wasting fuel in the other two cylinders. Not to mention, I would think performance would suffer. Whats wrong with the stock setup thats not working or you?

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. help needed on Fuji 780 carb removal please
    By D.Asher79 in forum Polaris Open Discussion
    Replies: 2
    Last Post: 07-09-2014, 08:33 PM
  2. Replies: 11
    Last Post: 06-27-2012, 07:31 AM
  3. You ever re-jet carbs??
    By Pistonwash in forum Yamaha PWC Performance (2-stroke)
    Replies: 9
    Last Post: 01-21-2009, 07:26 PM
  4. Do i need to re-jet my carbs??
    By kurt1200 in forum Yamaha PWC Performance (2-stroke)
    Replies: 12
    Last Post: 12-12-2007, 02:51 AM
  5. R&D Head on 951? carb re jetting?
    By RXPteamtimebomb in forum 2-Stroke Performance
    Replies: 3
    Last Post: 07-05-2007, 11:18 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
  •