1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

Pulling carbs not that hard!

Discussion in 'XJ Technical Chat' started by Jetfixer, May 10, 2016.

  1. Jetfixer

    Jetfixer Well-Known Member

    Messages:
    3,191
    Likes Received:
    1,501
    Trophy Points:
    113
    Location:
    Nothern Indiana
    Seen some posts about peoples bikes and pulling carbs ( compared to pulling teeth) I have an 82 Xj750 Seca
    with the stock airbox. I can pull these in about 15 minutes , and put them back on in about 20 minutes . The big secret is to use silicone grease on intake boots and on the airbox boots (makes putting carbs back easy peasy) . There is a 10mm bolt at the top of the airbox I remove it gives a little more play and clearance, hardest part is putting boots back in from the airbox . Right now I'm waiting on my new airbox boots from Xj4ever to arrive found one is torn and another is in bad shape , think this one of the reasons I can't get carbs synched with my gauges (#3 is low and airbox boot torn other 3 about even ) sprayed intake boot no change in idle so (tried propane too for giggles) (valves adjusted) (compression good 145) (carbs been to Church all new seal on shafts) So fingers crossed this is throwing my reading off slightly.
     
  2. XJ550H

    XJ550H Well-Known Member Premium Member

    Messages:
    13,199
    Likes Received:
    3,861
    Trophy Points:
    113
    Location:
    Great North Woods
    carbs that have sat for years can be difficult, at least on a running bike you can get the manifold boots warmed up.
    get the clamps loose so they are flopping around some spray on boots air and manifold.
    push the edges of air boots into the airbox.
    then a slight prying with a hammer handle working both sides get them out a little lube push back in to distribute lube. then out they come

    first set took me an hour, now its about 20 minutes.
    just need to buy more bikes so you can get more pratice at it;)

    just remember to use some assembly lube when reinstalling them and they will just about fall out when you need to remove them again

    air box boots is like removing a tire from rim
     
  3. tabaka45

    tabaka45 Well-Known Member

    Messages:
    2,400
    Likes Received:
    513
    Trophy Points:
    113
    Location:
    Brunswick, Georgia
    I have a screwdriver that is bent 90 degrees at the end and ground to a blunt point. I've found that this tool makes getting the boots back on much easier--along with the silicone grease. Just insert it in the boot and work your way around the carp and it pops on easily. If you make one, use a long thin screwdriver.
     
  4. mcdermap

    mcdermap Member

    Messages:
    42
    Likes Received:
    6
    Trophy Points:
    8
    Location:
    Warshington
    Shoot. I'm certain I did that six or eight times while tracking down leaks & getting my carbs set. Lazy approach on this bike = bad.
    I've found the most difficult part to be getting the carb boots back on the bastards.
    Personally, I use silicone grease to get the carbs back into the intakes (foot holding center stand down, then all of my might on the bodies of 1 & 4, then pop, they're in.)
    Getting new airbox to carb boots in takes some finaggling and grease on the carb sides. I push a tiny bit of the airbox-side through, then use an old brake-seal puller to goad thr rest through. Once all four are fitted to the airbox, I use the tool to prise the carb side seal around. Maybe fifteen minutes of my precious time.
     
  5. saftie

    saftie Well-Known Member Premium Member

    Messages:
    1,121
    Likes Received:
    283
    Trophy Points:
    83
    Location:
    New York, NY
    Hair dryer to warm them up.
     
  6. Jetfixer

    Jetfixer Well-Known Member

    Messages:
    3,191
    Likes Received:
    1,501
    Trophy Points:
    113
    Location:
    Nothern Indiana
    My post is mostly just to note if your carbs have never been off , then yes it can be a little difficult , but once they are off putting back in with a little silicone grease they usually slip right in. I agree with mcdermap and tabaka 45 with the tools I use a bunt long dull Phillips screw driver to get airbox boots and a booger hook to get them around bell mouth of carb. Of course the Previous Owner claimed carbs were "professionally" tuned ....2 different main jets 1&4 120 but 2&3 were 122.5 the boots off airbox were #3 ripped #1 has a chunk of flange missing , 3 different spark plugs o_O This is why doing the things we have to do to keep our bikes going , we are better off doing it ourselves !!!!:) don't fear trying yourself .
     
  7. rocs82650

    rocs82650 Well-Known Member

    Messages:
    2,663
    Likes Received:
    356
    Trophy Points:
    83
    Location:
    Middle Tennessee
    Check the spec against the model. This might be correct.

    Gary H.
     
    k-moe likes this.
  8. Jetfixer

    Jetfixer Well-Known Member

    Messages:
    3,191
    Likes Received:
    1,501
    Trophy Points:
    113
    Location:
    Nothern Indiana
    Nope manuals list 120 mains as stock ...guy i know runs a huge cycle breaker and sell new parts as well agreed wrong jets...I do trust the guy even though he can be a real @$!#&£× ....
     
    mcdermap, k-moe and rocs82650 like this.
  9. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

    Messages:
    19,647
    Likes Received:
    6,756
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    Yep. XJ750 120 mains in all carbs.
     
  10. joejr2

    joejr2 Active Member Premium Member

    Messages:
    713
    Likes Received:
    109
    Trophy Points:
    43
    Location:
    Santa Fe,NM
    I'm restoring my 3rd xj650.While learning to fix carbs I had them on and off alot.To take them off I spray a mix of dish soap and water on the airbox boots
    after loosening the airbox.Pull them straight down, they come off easy. Then, I slip a length of bicycle tube over a carpenter's ripping bar and pry the carbs off
    the engine boots. The last removal took 5 min.
    To reinstall, I position the carbs against the engine boots with wood blocks and shims. then zip tie a short 1 x 4 to the airbox, slip in my bar with rubber tube and
    pry on #1 carb.Then, I slip in a wedge cut from a 2 x 4 to hold it in place while I pry in #s 2-4 from the right side. with soapy water the carbs pop right on.
    The next trick is securing the engine boot clamps tightly and removing all the wood blocks.
    On the airbox side, I install #2 first through the airbox, push it onto the #2 carb intake flange and tighten the clamp, first rotating it so that the rubber tit on the boot fits
    between the two tits on top of the #2 airbox hole. Spray a shot of soapy water and it pops right in with the assist of a dull screwdriver. #1 goes next. Line up the marks and
    slip it over the carb intake and tighten the clamp. A squirt of soapy lube working with the screw driver and it pops in. Remove the clutch cable and install #3 the same way.
    By the time you get to #4 you're an expert. ( Tip ) Clean the carbs first with engine degreaser,a brush and rag and then run them through the dish washer.
     
  11. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

    Messages:
    19,647
    Likes Received:
    6,756
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    Guaranteed to make you a single man :p
     
    TheCrazyGnat likes this.
  12. joejr2

    joejr2 Active Member Premium Member

    Messages:
    713
    Likes Received:
    109
    Trophy Points:
    43
    Location:
    Santa Fe,NM
    My girlfriend of 20 years and I live happily in our own houses. Anyway, I clean and degrease the boots well before I run them through
    the dishwasher. What I meant to say was "run the carb boots through the d.w." not the entire set of carbs. whew !
     
  13. joejr2

    joejr2 Active Member Premium Member

    Messages:
    713
    Likes Received:
    109
    Trophy Points:
    43
    Location:
    Santa Fe,NM
    What I meant to say was to run the thoroughly degreased and cleaned carb boots through the dishwasher
    to soften them. Not the carbs themselves. I hope some poor guy didn't run a set of carbs through. LOL.
     
    TheCrazyGnat likes this.

Share This Page