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Thread: Carb cleaning 101

  1. #41
    Meh. Derator. jawhn's Avatar
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    Default Re: Carb cleaning 101

    sempul, cbr900racer77 is seriously good people, if you need a reference.

    Hell, someday I might take you up on that carb cleaning deal...
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  2. #42
    RRzone Elder cbr900racer77's Avatar
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    Default Re: Carb cleaning 101

    Always wanted to visit AZ. Spring for the airline ticket and we are in business
    "Crankenstein" is a GO...

  3. #43
    Meh. Derator. jawhn's Avatar
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    Default Re: Carb cleaning 101

    Quote Originally Posted by cbr900racer77 View Post
    Always wanted to visit AZ. Spring for the airline ticket and we are in business
    Holy shit... I will give that some serious consideration! And you're welcome to couch-trip any time.
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  4. #44
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    Default Re: Carb cleaning 101

    Great write up! I have a 98 cbr 900rr and I started a few hours ago... got the gas tank and intake box off.. disconnected the choke and throttle cables.. and sensor... i loosened the clamps holding the carbs to the engine. but for some reason, i cant get them off?? i dont see anything holding them do0wn... and the clamps are sooo lose that i can turn them (so they're actually not holding anything right now)

    any ideas? I have a manual and i followed all the steps... i dont want to force them off..

    thanks

  5. #45
    RRzone Member Tulok's Avatar
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    Default Re: Carb cleaning 101

    get a long extension or pry bar, wedge it in there. And force them off!
    Now get of the computer and get your butt back out there and do it!

  6. #46
    RRzone Elder cbr900racer77's Avatar
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    Default Re: Carb cleaning 101

    yup, do the ole "wiggle and pull"...be easy prying, make sure you aren't against something that is fragile.
    "Crankenstein" is a GO...

  7. #47
    RRzone Elder 66droptop's Avatar
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    Default Re: Carb cleaning 101

    Quote Originally Posted by cbr900racer77 View Post
    Do ya'll call em flathead screwdrivers in the UK? I have no idea what proper name is...
    Like the Brits would know the proper name for it. What with their weird words like dog's bollocks, bodged, knackered, fish & chips, and getting pissed. Just because your country's name is in the title of the language doesn't give you a free pass to start making up words all willy nilly to see if the rest of us can follow along.


    Quote Originally Posted by cbr900racer77 View Post
    Here in the south...if someone mentions "flathead", they're either talking screwdrivers or catfish
    The engine is the first thing that comes to mind. It must be too long because I didn't even think of the catfish.

  8. #48
    RRzone Elder cbr900racer77's Avatar
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    Default Re: Carb cleaning 101

    Them flatheads is good eatin
    "Crankenstein" is a GO...

  9. #49
    Secret Squirrel Member bikerdave's Avatar
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    Default Re: Carb cleaning 101

    I too am in the middle of rebuilding a set of '98 900 carbs.

    Mine has 20+ k on it and boy are those boots(if you call service honda

    they indicate them as insulators WTF) and boy are they expensive.

    It took three or four of us wiggling and tugging and just plain pulling

    to finally get them off.

    The instructor said there ain't no easy way.

    Just think of that rubber(not that thought!!!) having been thru how many

    gazzilion heat cycles.

    Some one mentioned on here for future reference when they go

    back on use some Grease(Oil lubricant!!!!) to help for the next time.
    Those who dance are considered crazy by those who
    can not hear the music!

  10. #50
    RRzone Elite bad dog's Avatar
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    Default Re: Carb cleaning 101

    Quote Originally Posted by bikerdave View Post

    Some one mentioned on here for future reference when they go

    back on use some Grease(Oil lubricant!!!!) to help for the next time.
    I use silicone spray, that way it won't damage the rubber or cause them to get damaged. Some lubes will either cause the boots to deterioate or swell,
    1993 CBR900RR Fireblade, street bike/racebike going back to street duty only. Very tired, but being rebuilt, we have the technology!

    2000 GSXR750-racebike, WMRC #280

    1989 Turbo Caravan-full load, daily driver, 12.5@104 mph.

  11. #51
    Meh. Derator. jawhn's Avatar
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    Default Re: Carb cleaning 101

    I remember it was a nightmare getting them off of my CBR600F2... What I ended up doing is taking a longish 2x4 and drilling holes into it that lined up with the holes on the top of the carbs, buying longer screws that threaded into the top of the carbs, then basically mounting the 2x4 to the carbs, then a 3-person deal: Me and Suzanne laying on our backs on the floor, timing our kicks upward, and Jaime holding the bike upright. Came off after a few kicks, but damn if we didn't curse a blue flame trying to get those damn things off first.
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  12. #52
    RRzone Elite bad dog's Avatar
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    Default Re: Carb cleaning 101

    Another option is to get the bike warm first, or use a heat gun/hair dryer to soften up the rubber, helps tons.
    1993 CBR900RR Fireblade, street bike/racebike going back to street duty only. Very tired, but being rebuilt, we have the technology!

    2000 GSXR750-racebike, WMRC #280

    1989 Turbo Caravan-full load, daily driver, 12.5@104 mph.

  13. #53
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    Default Re: Carb cleaning 101

    thanks for the advice! i got the carbs off.. i used a hair dryer and warmed the rubber.. then sat on the bike (like I was going to ride) and pulled them off that way.. it helped me get a better grip on them and hold the bike down at the same time.. i cleaned out everything as this how-to specified.. i didn't use a dremel for the fuel screws.. i didn't have a dremel head that small.. so i took the back end of an electrical connector (the plastic ones) and used that to turn the fuel screws... only problem is im not sure if i put them back exactly how they were.. what will happen??

  14. #54
    RRzone Elder 970rr's Avatar
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    Default Re: Carb cleaning 101

    Quote Originally Posted by xiztence View Post
    .. i didn't have a dremel head that small.. so i took the back end of an electrical connector (the plastic ones) and used that to turn the fuel screws... only problem is im not sure if i put them back exactly how they were.. what will happen??
    grave danger of explosion! don't screw those too tight!!

  15. #55
    RRzone Elite bad dog's Avatar
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    Default Re: Carb cleaning 101

    Quote Originally Posted by xiztence View Post
    thanks for the advice! i got the carbs off.. i used a hair dryer and warmed the rubber.. then sat on the bike (like I was going to ride) and pulled them off that way.. it helped me get a better grip on them and hold the bike down at the same time.. i cleaned out everything as this how-to specified.. i didn't use a dremel for the fuel screws.. i didn't have a dremel head that small.. so i took the back end of an electrical connector (the plastic ones) and used that to turn the fuel screws... only problem is im not sure if i put them back exactly how they were.. what will happen??
    If your talking about the mixture screws, then you'll have a crappy idle.
    1993 CBR900RR Fireblade, street bike/racebike going back to street duty only. Very tired, but being rebuilt, we have the technology!

    2000 GSXR750-racebike, WMRC #280

    1989 Turbo Caravan-full load, daily driver, 12.5@104 mph.

  16. #56
    RRzone Elder cbr900racer77's Avatar
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    Default Re: Carb cleaning 101

    yup, those need to be right. You need to have a good grip on them so you know you don't seat them too tight and get them turned out right amount. The cutting wheel I use is normal size so it does cut into carb body slightly, but has no ill effects. I need to break down and buy that tool one of these days
    "Crankenstein" is a GO...

  17. #57
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    Default Re: Carb cleaning 101

    thanks.. i got everthing back together and my bike still won't start.. i will create a new post in the 900rr section..

  18. #58
    RRzone Member Mobley's Avatar
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    Default Re: Carb cleaning 101

    Thanks for the write up. I was confident i could figure it out but it was nice to have a guide if I screwed up. Got them cleaned but didn't find much crud so I am thinking that wasn't my problem. Oh well it still needed to be done I will know for sure tomorrow. Oh yeah and no joke about B-12 eating eyeballs.

  19. #59
    RRzone Elder cbr900racer77's Avatar
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    Default Re: Carb cleaning 101

    I've tried them all and B-12 kicked everybody's ass in cleaning dept. That shit is wicked. Other day my next door neighbor was over while I was working on his 3wheeler. Noticed he was spraying something trying to kill bumble bees flying around. Looked and seen it was a can of my beloved B-12. Had to jump all over his shit, that stuff ain't cheap Btw, killed the bees on contact.
    "Crankenstein" is a GO...

  20. #60
    Not been here that long novadose427's Avatar
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    Default Re: Carb cleaning 101

    Quote Originally Posted by cbr900racer77 View Post
    Now it's time to do some cleaning. Cleaner is under alot of pressure and B12 will eat some eyeballs up so be careful using it. It will also get in open sores/cuts and burn like hell! Use an old toothbrush to clean inside bowl and a clean shoprag soaked in B12 to get in the corners. Anything that is a dull orange color needs to be cleaned. Using the red tube that came with cleaner, squirt some down hole in rear of carb. This is the air supply for pilot jet.
    Hi i am new to the forum. My name is Brian. In process of cleaning my carbs now..the one you have the red tube pointed at, air goes thru all of mine.
    The one to the left and 2 up, doesnt seem like any air is getting thru on all four carbs. Do you know where it should be coming out from? Thanks for your time.
    Last edited by novadose427; May 18th, 2010 at 08:21 PM.

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