Page 1 of 2 12 LastLast
Results 1 to 10 of 18

Thread: 1100 Carbs enrichener circuit flaw

  1. #1
    Site Supporter George's Avatar
    Bike
    01 ST1100
    Join Date
    Feb 2005
    Location
    Kingman, Arizona
    Posts
    15,767
    Tip Overs:
    12
    My SPOT
    My Gallery

    1100 Carbs enrichener circuit flaw

    Finally got around to looking for my "hard start when cold" problem. I was suspecting plugged enrichener circuits (not really a "choke" on the 1100.)

    (Pulled the carbs to also check for a suspected coolant link and found the loose clamp on the right bank coolant elbow.)

    Turns out, the link between the left bank (where the cable connects) and the right side is too "limp" to fully open #1 and #3 circuits. The link is a small diameter rod with two kinks in it;when it gets pulled, the kinks straighten just a bit rather than pulling the circuits open fully. I checked my shelf set and it does the same. Maybe Ma Honda didn't think bikes get started at temps below freezing.

    Usually not a problem above 45° but when it's lower than that, the right bank won't fire 'til there's some heat in the system. Runs fine once warmed up.

    I'm thinking a second cable from the right enrichener activator rod to an accessible location, just for those hard start occasions. Other (more involved) fix would be a more stiff link between the two sides.

    Any other thoughts?
    George
    "Live Every Moment,,, Love Every Day,,, Because,,, Before you know it,,, Your Precious Time Slips Away... ---REO Speedwagon, via ACL

    Check my albums Picasa

  2. #2
    Life Is Good! John OoSTerhuis's Avatar
    Bike
    1991 SSMST1100
    Join Date
    May 2005
    Location
    Bettendorf, Iowa
    Posts
    2,618
    Tip Overs:
    13
    2014 Miles:
    000409

    My Gallery

    Re: 1100 Carbs enrichener circuit flaw

    Got any pictures, George?

  3. #3
    PaleoCyclist bdalameda's Avatar
    Bike
    ST1100
    Join Date
    Jan 2009
    Location
    Salinas, California
    Age
    57
    Posts
    2,056
    My SPOT
    My Gallery

    Re: 1100 Carbs enrichener circuit flaw

    I have noticed that the enrichener plungers become somewhat stiff to operate due to corrosion and lack of lubrication. This is common on all carbs using this type of enrichener. If you remove the plunger and lubricate the shaft and threaded bushing you may find that it will then work more freely and require much less to pull. This may fix the problem.

    Dan
    One can no more enjoy life by hoping for a future result than you can enjoy beautiful music by waiting for the final note.


  4. #4
    Headed to Moonshine! sirepair's Avatar
    Bike
    93 ST1100
    Join Date
    Jun 2007
    Location
    Chillicothe, Ohio
    Age
    53
    Posts
    4,171
    Tip Overs:
    3
    My SPOT
    My Gallery

    Re: 1100 Carbs enrichener circuit flaw

    Ether injection? (a lil dab will do ya!)

    Remake of the rod would be the best, I guess. Billet aluminum!!
    It's S-I-Repair! Pat O STOC# 7105 IBA# 37880 There's no dumbass vaccine!
    93 ST1100 "Suzaku" C.G. Red (you know, the fast color!)
    84 VF500F Original Owner! 89 NX250 (will live again!)
    This week I achieved unprecedented amounts of unverifiable levels of productivity...

  5. #5
    Ross Ross Smith's Avatar
    Bike
    1999 St1100
    Join Date
    May 2010
    Location
    Elliot Lake, ON, Canada
    Posts
    224
    Tip Overs:
    1
    My Gallery

    Re: 1100 Carbs enrichener circuit flaw

    Started mine at -5 C the other day to flush some old gas out of the carbs after sitting idle since November. The bike fired up almost immediately. Don't think there's anything wrong with Honda's enrichener design, but I do think yours may either be worn or is badly out of adjustment.

    As John O has asked, got any pix?

    Ross

  6. #6
    BuddingGeezer's Avatar
    Bike
    1991 ST1100
    Join Date
    Jul 2008
    Location
    Benton, AR
    Age
    62
    Posts
    958
    Tip Overs:
    2
    My Gallery

    Re: 1100 Carbs enrichener circuit flaw

    George,
    My '91 will start at well below freezing. Open the enricheners, don't touch the throttle, hit the starter button and the engine starts immediately. At 45 degrees F I don't even need the choke to start (idle, yes), throttle 1/8 open hit the button, immediate start. One other thing, mine doesn't get 50mpg either.
    I'm not totally useless, I can be used as a bad example.

    Ralph Sims

  7. #7
    Why arn't we riding? The Cheese's Avatar
    Bike
    1995 ST1100
    Join Date
    Feb 2011
    Location
    Toccoa GA
    Posts
    538
    Tip Overs:
    2
    My Gallery

    Re: 1100 Carbs enrichener circuit flaw

    When I did my carbs I noticed something very similar. The right side would not fully engauge because of the same issue as above. When the linkage was gently forced out, it would hang up. The solution was to clean the enrich valves as much as possible. Very, very lightly sand the brass looking shaft to remove burrs. A small drop of 3n1 oil was added to each brass looking shaft. That helped alot. Did not completly get rid of the binding. It was then found that the linkage for the right side was put on ever so slightly different. Fixed the POs "fixing", and it went back to normal. Have not had another issue since then.
    Shalom
    Michael

    Adopt, adapt and improve.

  8. #8
    Site Supporter
    (Threadstarter)
    George's Avatar
    Bike
    01 ST1100
    Join Date
    Feb 2005
    Location
    Kingman, Arizona
    Posts
    15,767
    Tip Overs:
    12
    My SPOT
    My Gallery

    Re: 1100 Carbs enrichener circuit flaw

    I'll take some pix. There's a lot of slop between #2 & #4, a lot of slop left to right, and more slop between #1 & #3. By the end of the chain, #3 barely moves at all.

    The easiest to remove is #3 (?? upside down and left to right, uh)... yes, #3 , so pulled that circuit out. All looks good in there, no corrosion or obvious problem.

    I'll go ahead and remove all 4, burnish the rod and add a drop of oil on reassembly. But just the slop in the system deletes a lot of potential movement. Maybe some tiny washers to tighten things up little.

    Also, does it need all the possible movement. Seems should only be necessary to pull the plunger off it's seat and all four do that. Hmmmmm, still thinking.

    Thanks for the input, guys. Watch this space.

  9. #9

    Re: 1100 Carbs enrichener circuit flaw

    As I recall, there is a rod with "Z" bends that ties the left bank to the right bank at #3 (right rear). There is a larger diameter rod that then ties #3 to #1 that has and adjustment screw where you can set the travel for #1 (right front)

    If you loosen this screw - you should be able to get #3 working properly by straightening out the bends in the Z rod. Once that is done, you can then set the travel for #1. There is also the same adjustment on the left bank

    not the best pic, but all I could find at the moment
    Attached Thumbnails Attached Thumbnails carb.jpg  
    John H

  10. #10
    Site Supporter
    (Threadstarter)
    George's Avatar
    Bike
    01 ST1100
    Join Date
    Feb 2005
    Location
    Kingman, Arizona
    Posts
    15,767
    Tip Overs:
    12
    My SPOT
    My Gallery

    Re: 1100 Carbs enrichener circuit flaw

    What you say is correct, John, except the bends in the rod are stock, and the adjustment screws are set to tightest tolerance. The adjustment is for #3 as #1 is driven directly by the cross rod. Also, the adjustment screw on the left side is for #1 as #4 is is driven directly by the lever.

    Your lower/left arrow shows part of the problem, note the tiny gap between the end of the "brass" rod and the adjustable bracket. Farther to the left is the lever to push those two pieces. Between the lever, the bracket, and the end of the rod there's enuff play to take up a lot of the potential movement. Looks to be a similar gap at the right arrow, #1 enrichener circuit plunger.

    Behind the screw driver is the throttle link for the left to right sides. Note there is a "Z" bend in that link too but it's made from much sturdier bar stock. The rod between the side for the enricheners is about 8 gauge steel wire.

    Thanks for the pic, John, I'll take a couple more as I fiddle with it.

    More to come.

    Folks, John's foto is the left side carbs, as ID'ed by the single carb synch screw.

+ New Posts
Page 1 of 2 12 LastLast

Posting Permissions

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