Results 1 to 5 of 5
  1. #1

    more carb sync help PLEASE!

    still can't get those carbs to sync up right is there some other trick to do this that im missing? i can get them to either open the same or close the same but never both at the same time...HELPPPPPPPPPPPP!


  2. #2
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
    Join Date
    Jul 2007
    Location
    Cedar Rapids,Iowa
    Posts
    6,381
    +1
    23
    Seperate them from the rack and reposition all the same.

  3. #3
    Lake Mead Bum & BTLS Mark starflight's Avatar
    Join Date
    May 2007
    Location
    Boulder City, NV
    Posts
    3,364
    +1
    1
    Here's what I do, and I just pulled the carbs for a jet change and found the pto carb not closing 100% when the idle adj screw was backed off. The mag and cen carbs did close completely.
    Anyhow, I leave the carb rack intact, and use mirrors to reflect light from above my bench to shine light through the carb bores.
    You can see the throttle plate is not closed by the light shining through in the 3rd pic.
    To be continued....
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	HPIM3433.JPG 
Views:	51 
Size:	819.1 KB 
ID:	148969   Click image for larger version. 

Name:	HPIM3440.JPG 
Views:	50 
Size:	1.33 MB 
ID:	148970   Click image for larger version. 

Name:	HPIM3435.JPG 
Views:	56 
Size:	1.47 MB 
ID:	148971  

  4. #4
    Lake Mead Bum & BTLS Mark starflight's Avatar
    Join Date
    May 2007
    Location
    Boulder City, NV
    Posts
    3,364
    +1
    1
    You need to turn the idle adj screw, and the return stop screw out till they don't effect the throttle plate position on any of the carbs. I was lucky and only had to turn the adjustment screw out on the pto carb (ccw) to get it to close, and open at the same time as the other carbs.
    I then use the idle adj. screw to open the throtltle plates and see that they open at the same time.

    If you need to adjust all 3 carbs, I find it easier to get an end carb to close fully, and adjust the next inline to do the same. Then adj. the last carb and tweek each as needed to get them to open an close at the same time.
    The fourth pic is of all carbs closed completely.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	HPIM3437.JPG 
Views:	47 
Size:	300.0 KB 
ID:	149000   Click image for larger version. 

Name:	HPIM3436.JPG 
Views:	46 
Size:	305.9 KB 
ID:	149001   Click image for larger version. 

Name:	HPIM3438.JPG 
Views:	52 
Size:	1.13 MB 
ID:	149002   Click image for larger version. 

Name:	HPIM3441.JPG 
Views:	49 
Size:	1.51 MB 
ID:	149003  

  5. #5
    Lake Mead Bum & BTLS Mark starflight's Avatar
    Join Date
    May 2007
    Location
    Boulder City, NV
    Posts
    3,364
    +1
    1
    With the idle adj. I can visually see that they open and close at the same time.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	HPIM3442.JPG 
Views:	51 
Size:	1.46 MB 
ID:	149004   Click image for larger version. 

Name:	HPIM3443.JPG 
Views:	48 
Size:	1.47 MB 
ID:	149005   Click image for larger version. 

Name:	HPIM3444.JPG 
Views:	55 
Size:	1.42 MB 
ID:	149006   Click image for larger version. 

Name:	HPIM3445.JPG 
Views:	53 
Size:	1.48 MB 
ID:	149007  

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Gp1200r carb jetting help please
    By ricky.micallef71 in forum Yamaha PWC Performance (2-stroke)
    Replies: 1
    Last Post: 06-18-2015, 02:27 PM
  2. 96 Raider 1100 Carb tuning help please
    By Oneboss302 in forum Yamaha Old School Skis
    Replies: 4
    Last Post: 06-04-2012, 07:39 AM
  3. Having problems starting my 900 STX after carb cleaning, HELP PLEASE???
    By Bala in forum Kawasaki PWC Performance (2-stroke)
    Replies: 1
    Last Post: 05-10-2008, 06:03 PM
  4. More ext pump help please
    By novanuttz in forum Polaris Open Discussion
    Replies: 3
    Last Post: 06-03-2007, 02:32 PM
  5. A little more XP800 tuning help please...
    By javiert99 in forum 4-Tec Performance
    Replies: 3
    Last Post: 10-08-2006, 12:36 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
  •