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So, in addition to the cotton, I also found 2 air cutoff things destroyed. One was COMPLETELY obliterated and separated, one was getting there. So definitely am going to need to replace those. Also need to track down the mixture jet screws and such.
Also randomly found a piece of a leaf in the air cutoff. What the hell have these things done?!?!?
After today's BBQ (or before, if my buddy refuses to wake up - I don't like lazy people!  ) I'm going to start cleaning out the carb bodies and everything. Looked into having them media blasted, but only found 1 place to do it (my bike mechanic) and he said he'd end up charging ~ $400 just for the blasting (he said it'd take a long time to get each one done). Screw that. And I don't know where else around here I could take 'em. I'll just use mineral spirits or carb clean and a brass brush to clean up the rust, and carb clean to get the oxidation out.
Turbos, Hondas, 4-bangers, what could go wrong?
 Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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Here's pictures of what I'm talking about. Sorry for how long it's taken, I've been too busy. What could cause this? I'm also going to e-mail Randakk (got the kit from him a year ago and rebuilt the carbs then) and see what he says.
 
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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Shared the pics with him and just heard back. Apparently he's on vacation until the 17th, and will help me with figuring out wtf happened.
Meanwhile, says this is synonymous with greater-than-e10 fuels, or tank cleaners. I haven't ran anything through the tank, and I've always used gasoline from the pumps (which I think is now nationally legally allowed up to e15, and no way to know if its e10 or 15 or what).
Joy.
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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Hmmm...when I saw that earlier post(of the rotten rubber) I knew he was gonna come back with the ethanol fuel excuse. I'm sorry,and I hate to be blunt here,but when did the US finally outlaw leaded fuels???....Answer: first of 1996. Ok,so they added tetraethyl lead to gasoline in the '20's to provide anti-knock capabilities to increase engine compression and allow for greater power to be extracted from IC engines.<- Fact. In the '70's the US started phasing out leaded gas and it was ''all gone'' by '96. The oil companies used tetraethyl lead because it was a much,much cheaper additive than alcohol(ethanol).Even though they were full aware of the huge health concerns it was responsible for!!! <-Fact. So,when they took the lead away...what did they use to replace it??? Yep,you guessed it. There had to be SOMETHING added,and lead was out of the question(Thank God). Ethanol infused gasoline is not a new phenomenon. But it's an easy thing to lay blame on when rubber parts rot! Nobody wants to admit that modern day rubber has been ruined by the EPA and will no longer hold up like it used to.It's the same reason modern day tires rot off in just a handful of years,vs the ''old tires'' that I've personally used for 10+ years without any dry rot issues.What??...are they spraying the highways with ethanol to rot our tires now? Um,no.It's shitty rubber.
Sorry for the rant. I just hate when people get on the ''ethanol ruined my [whatever]'' bandwagon. Alcohol is a fantastic cleaning agent. Ever use an alcohol swab to clean something and find it leaves behind a gummy film? No. Because it won't. Again,sorry for the rant.  Sorry about your luck. Good luck on your bike buddy. I'll shut up now 
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Dude, you have no reason to shut up. I understand what you're saying totally. I can only hope he recognizes that this is likely a faulty product and helps me out with getting some new product. For all I know, this was a bad batch.
On Jun 9, 2013 2:30 AM, "shinyribs [via Honda CB750'S]" < [hidden email]> wrote:
Hmmm...when I saw that earlier post(of the rotten rubber) I knew he was gonna come back with the ethanol fuel excuse. I'm sorry,and I hate to be blunt here,but when did the US finally outlaw leaded fuels???....Answer: first of 1996. Ok,so they added tetraethyl lead to gasoline in the '20's to provide anti-knock capabilities to increase engine compression and allow for greater power to be extracted from IC engines.<- Fact. In the '70's the US started phasing out leaded gas and it was ''all gone'' by '96. The oil companies used tetraethyl lead because it was a much,much cheaper additive than alcohol(ethanol).Even though they were full aware of the huge health concerns it was responsible for!!! <-Fact. So,when they took the lead away...what did they use to replace it??? Yep,you guessed it. There had to be SOMETHING added,and lead was out of the question(Thank God). Ethanol infused gasoline is not a new phenomenon. But it's an easy thing to lay blame on when rubber parts rot! Nobody wants to admit that modern day rubber has been ruined by the EPA and will no longer hold up like it used to.It's the same reason modern day tires rot off in just a handful of years,vs the ''old tires'' that I've personally used for 10+ years without any dry rot issues.What??...are they spraying the highways with ethanol to rot our tires now? Um,no.It's shitty rubber.
Sorry for the rant. I just hate when people get on the ''ethanol ruined my [whatever]'' bandwagon. Alcohol is a fantastic cleaning agent. Ever use an alcohol swab to clean something and find it leaves behind a gummy film? No. Because it won't. Again,sorry for the rant.
Sorry about your luck. Good luck on your bike buddy. I'll shut up now
Montvale,Virginia
Experience is something you get just after you need it.
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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Those almost look like you soaked them on carb cleaner. Not saying you did, just that they look like they're in really bad shape.
Sent from my BlackBerry device
Dude, you have no reason to shut up. I understand what you're saying totally. I can only hope he recognizes that this is likely a faulty product and helps me out with getting some new product. For all I know, this was a bad batch.
On Jun 9, 2013 2:30 AM, "shinyribs [via Honda CB750'S]" < [hidden email]> wrote:
Hmmm...when I saw that earlier post(of the rotten rubber) I knew he was gonna come back with the ethanol fuel excuse. I'm sorry,and I hate to be blunt here,but when did the US finally outlaw leaded fuels???....Answer: first of 1996. Ok,so they added tetraethyl lead to gasoline in the '20's to provide anti-knock capabilities to increase engine compression and allow for greater power to be extracted from IC engines.<- Fact. In the '70's the US started phasing out leaded gas and it was ''all gone'' by '96. The oil companies used tetraethyl lead because it was a much,much cheaper additive than alcohol(ethanol).Even though they were full aware of the huge health concerns it was responsible for!!! <-Fact. So,when they took the lead away...what did they use to replace it??? Yep,you guessed it. There had to be SOMETHING added,and lead was out of the question(Thank God). Ethanol infused gasoline is not a new phenomenon. But it's an easy thing to lay blame on when rubber parts rot! Nobody wants to admit that modern day rubber has been ruined by the EPA and will no longer hold up like it used to.It's the same reason modern day tires rot off in just a handful of years,vs the ''old tires'' that I've personally used for 10+ years without any dry rot issues.What??...are they spraying the highways with ethanol to rot our tires now? Um,no.It's shitty rubber.
Sorry for the rant. I just hate when people get on the ''ethanol ruined my [whatever]'' bandwagon. Alcohol is a fantastic cleaning agent. Ever use an alcohol swab to clean something and find it leaves behind a gummy film? No. Because it won't. Again,sorry for the rant.
Sorry about your luck. Good luck on your bike buddy. I'll shut up now
Montvale,Virginia
Experience is something you get just after you need it.
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals
My wife's recipe website that I'm trying to help promote: Strawberries for supper. Yes, I am a lucky man.
My cb750 video site
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I cleaned off the carbs with carb cleaner before I put these air cutoffs on a year ago, but that's the last time they ever saw carb cleaner.
Sucks that the bike's going to be down for most of June, into July now. I thought rebuilding carbs was supposed to be a once every few years thing. Guess I got more to learn.
Any recommendations on carb kits that aren't Randakk, since the last one didn't exactly pan out? Going to give him a chance to make it right first, but as he won't even discuss it until the 17th I would like a go-to plan if that doesn't get me anywhere.
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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We all know I have zero DOHC experience,but the rubber bits I've gotten for my carbs have all came from K&L. So far so good. Wish I could help more,but that's all I got.
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That is odd. Randakks kits are highly respected and recommended in all sorts of Honda engines. Yea, you could go with K&L, or do the air cutout bypass mod and be done with them I guess.
Did your bike have a history of backfireing?
81 Honda CB750C - Current Project
67 BSA Spitfire MkIII - Next Up (Full Resto)
81 Honda GL1100 - Bob / Cafe´
80 Suzuki GS750L - Bratstyle
72 Honda CB450K5 - Basket Case
73 Honda CB350F Cafe' (Gone but not forgotten)
Don't wait for opportunity to knock... kick the door down and drag the old harlot in!
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Not that I'm aware of. It would once in a while, but no idea if the sound I was hearing was backfire or what. Even if so, could that have done this damage?
Also, still gotta figure out wtf caused the gunk in the #4 carb. Yes, that one is the one that was fuel starved and was also one of these destroyed cutoffs, so perhaps something got into it? I'm also wondering if riding in the freezing temps could have caused this? I did ride from freezing 20 deg. to warm 40's to 60's and back to freezing in a few days...
 I just don't know enough about these things.
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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The temps would not have anything to do with the carbs messing up. I have gotten several carb kits from vintagecb750.com and never had a problem. If you want, send me your carbs, and I will sonic clean, and bead blast them, for you.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Tools, that is awesome. This place is legit. 
1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals
My wife's recipe website that I'm trying to help promote: Strawberries for supper. Yes, I am a lucky man.
My cb750 video site
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Tools, you rock! I will call later for address and how much to give you. I cannot thank you enough for this!
Goodness this site rocks.
On Jun 10, 2013 3:33 PM, "seestheday [via Honda CB750'S]" < [hidden email]> wrote:
Tools, that is awesome. This place is legit.
1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals
My wife's recipe website that I'm trying to help promote: BuffyAndGeorge.com. Yes, I am a lucky man.
My cb750 video site
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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Administrator
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Agreed!  <---Tools. Mighty nice of ya buddy!
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Administrator
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Well CDA did do his best to help me out with a little problem some time back, so this is the least I could do to repay the favor.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Oh hell, that was nothing! This is far and above much better/higher.
I also forgot that you're 2 hours behind, I could have called you when I thought it was too late. D'OH!
Hopefully tomorrow is much better and I can get everything caught up once and for all and I can get a phone call in.
Seriously, thanks man!
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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Administrator
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This post was updated on .
It was a big deal to me.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Well, I am glad I was able to help as much as I could.
Sorry I haven't called, I have been busy with life unfortunately. Just tried to call you, I have a 616 area code. I will try again tomorrow. Will probably get the carbs packed up over this weekend and sent out Monday if I get ahold off you. Thanks again man, I really appreciate it!
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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Talked to TOOLS last night, once again reminded by how awesome this forum is.
Going to hopefully get the carbs off to him this weekend or Monday at the latest, and talk to RANDAKK this upcoming week as they won't talk while on vacation. If that doesn't pan out and he refuses to help me get stuff replaced, I'm going to order a rebuild kit from vintagecb750.com. Hopefully the parts come in quick, and I can get the bike finally going next weekend. Going to spend this Sunday (hopefully) getting the rear axle off the rear wheel (it's stuck to the brake cover), get the chain cleaned, and overall clean up the bike. Also get the oil changed out and ready for starting.
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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This post was updated on .
Editing for possible decent resolution...
Will update once I have final confirmation.
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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