Author Topic: My project thus far. "Elsa" (Read 84504 times)

cb750fbomb · « **Reply #100 on:** March 09, 2009, 09:37:26 AM »

This thread is an entertaining read

I'm looking forward to seeing what sort of beast you create. Maybe you should go for an 80's Ronnie James Dio theme with ruffles and Italian midgets

moham · « **Reply #101 on:** March 09, 2009, 10:34:14 AM »

Quote from: Ecosse on March 09, 2009, 10:00:07 AM

Quote from: cb750fbomb on March 09, 2009, 09:37:26 AM
... and Italian midgets

You mean like Al Pacino?

Or Joe Pesci..."do I amuse you? How the f&$k am I funny??!?"...

Inkscars · « **Reply #102 on:** March 09, 2009, 11:33:21 AM »

ALRIGHT,
i pulled apart my carbs and there is unknown bullsh1t in my carbs, blocking every goddamned passage possible. I'm about 50% through them now. I don't know where the sh1t came from. I got the tank off schmebay, drained and packed. filled it with gas, drained, half filled tank, sloshed around, drained. filled half way up, sloshed gas, installed filter on petcock, drained gas through filter, filter looks ok. hooked up tank to carbs, ran, died, wouldn't restart, battery died. recharge battery, check fuel, ok, turn on petcock crank crank crank no start. now, i've got the carbs apart. I need someone with a 77 honda cb750k to pull off the bowl on the carb with the accel pump on it and tell me if it's got a damn spring as well as the boot.

squeak. heeelllllllp me, I'm melting!!!!

HavocTurbo · « **Reply #103 on:** March 09, 2009, 11:48:38 AM »

All that crap could be a result of you cleaning your passages. My 78 carbs were all but hopeless. I could never figure it out where it was all coming from. In the end I just cleaned and cleaned and eliminated things one by one like you are doing.

Wonderful this process of elimination eh?

Accell pump has spring that goes above the diaphram between the diaphram and the cover.

http://www.bikebandit.com/houseofmotorcycles/honda-motorcycle-cb750k-1977-carburetor-components/o/m9457sch403305

Hope that helps.

Inkscars · « **Reply #104 on:** March 09, 2009, 12:08:08 PM »

Quote from: HavocTurbo on March 09, 2009, 11:48:38 AM

All that crap could be a result of you cleaning your passages. My 78 carbs were all but hopeless. I could never figure it out where it was all coming from. In the end I just cleaned and cleaned and eliminated things one by one like you are doing.

Wonderful this process of elimination eh?

Accell pump has spring that goes above the diaphram between the diaphram and the cover.

http://www.bikebandit.com/houseofmotorcycles/honda-motorcycle-cb750k-1977-carburetor-components/o/m9457sch403305

Hope that helps.

No other spring though? I have that one. The cleaner is hurting the cuts in my fingers. but this #$%* is about to be "CRYSTAL" on the "real" lmao.

TwoTired · « **Reply #105 on:** March 09, 2009, 01:28:26 PM »

I'm late to the party. (I'm guessing my invitation was lost in the mail.

) So, I haven't read the entire thread, just the last couple pages.
You have an earlier style tank and fuel valve. These have a filter screen and a sediment bowl.

You can test the tank/valve assembly separately without fouling newly cleaned carbs.
Put gas in tank, and an exit hose on the petcock to a gas can. Slosh the tank around while the petcock is set to the reserve setting. If you chose a collection gas can that you can see into, you can check it for debris. You can also check the sediment bowl for debris collection there, as well.
You could also peer about inside the tank for anything that isn't gasoline.

An alternative is to go find a large automotive clear case filter fuel for the above test. Put this between the tank valve and your collection tank. You can recycle the gas in this way while flushing the tank. The clear filter should show visually if crud is still coming out of the tank. Don't neglect to operate the fuel valve while flushing, to get particles out of that, as well.

There is no point in connecting your fuel supply to carburetors until you are confident that it will only supply gasoline without any "extras".
Note that the pilot jets only have an orifice diameter about 0.016 of an inch. Smaller particles with flow through. But, larger particles will stuff up the small jets, making head pipes colder. Almost any particle can stop the full closure of the float valves. It's good practice to shut off the tank valve when the engine isn't running.

After you have total and complete confidence that the fuel supply is clean, THEN connect to your cleaned carbs.

If your supply has been contaminated, all orifices and passageways need be checked for clear and proven flow. Pilot/idle/slow system and the accel pump circuits and outlets. You can check all these off the bike.

The number two bowl can be filled separately on the bench, and the pump verified to move fuel in one direction only after it has primed its passageways. Further, the full bowl can be mounted onto the benched carbs and each nozzle in the four carbs can be observed to squirt/spray into the carb throats. If they don't, then nozzle cleaning it required before putting the carbs back on the bike.

Cheers,

Inkscars · « **Reply #106 on:** March 09, 2009, 02:03:07 PM »

I actually DID invite you on another thread. I'm glad you finally came. Better late than never. lol.
I do have a filter in line from my fuel supply and my "line" from the tank to the filter and the filter to the carbs is clear. I believe I noted the procedure a couple of posts ago. Anyway, I am going to filter the fuel out of the tank, AGAIN and make sure that no more fuel is contaminated. after that is all filtered, I will put it back in the tank and do it again. I'm getting to the point where i can remove the carbs and break them down pretty quickly, but I'm worried about my hoses. If i keep going at this rate i'm going to have to replace all my clamps and hoses, and intake boots soon. I'm not sure where this is coming from but i am going to get to the bottom of it. If I'm not careful I'll give up before I even get riding. I don't suppose you have a petcock rebuild kit laying around that I could purchase do ya? I guess I'll hit up ebay.

goon 1492 · « **Reply #107 on:** March 09, 2009, 02:24:53 PM »

You just got helped by a heavy hitter, TT know's his stuff.

You might also consider checking all the boots,(sorry can't remember the name right now) but the ones between the carbs and engine is what I am talking about. The velocity stacks are only about 12 bones a piece at hondaparts-direct.com
The other ones I talked about are a little more. You will find trouble with the inline filters with the setup of the bike the inlines like to trap air and cause a vacuum lock(is that worded right

). I had to take mine out and after cleaning the screen in the petcock all was good.

Carbs like to hide gremlins in them and might need an exorcism...

Inkscars · « **Reply #108 on:** March 09, 2009, 03:11:26 PM »

Works almost over. I'm gonna run over to a bench and try and set them up one more time. Bolt em back together and when I get home, I'll try and clean the tank out more.
I don't think I'll be done with all that tonight, but I'll keep ya posted and maybe take some beloved pics.

Inkscars · « **Reply #109 on:** March 09, 2009, 03:24:52 PM »

Two Tired, one more question.
I'm measuring 14.5mm from the bottom of the carb to the flat surface on the float, However, do you measure with the carbs in the position as they would be on the bike, or laying down on their "backs"?

Duke McDukiedook · « **Reply #110 on:** March 09, 2009, 03:30:34 PM »

Yeah, if you have a clean tank give those inline filters the heave ho, cause more problems than they help. Measure from the bottom of the upper half of the carb (you can buy a special tool to measure this, someone on a thread made one out of an old 3.5" floppy disk) to where they "engage" the float valve.
I'm sure someone has a pic somewhere showing this.

Inkscars · « **Reply #111 on:** March 09, 2009, 03:45:52 PM »

As soon as crap stops coming out of the tank, I'm throwing it out. No worries.

mystic_1 · « **Reply #112 on:** March 09, 2009, 04:44:42 PM »

Nah, clean it and keep it in the tool bin for future use (says the packrat).

BTW have you disassembled the petcock and cleaned out real well in there? Crap tends to accumulate on the flat rubber washer with the four holes in it, and on the friction spring behind the petcock lever (possibly galvanic corrosion between the steel spring and aluminum petcock?). This is the sediment bowl equipped dual-spigot petcock, yes?

mystic_1

Duke McDukiedook · « **Reply #113 on:** March 09, 2009, 05:33:12 PM »

Oh yeah, I didn't mean throw them away totally, just off the bike. Never know...

TwoTired · « **Reply #114 on:** March 09, 2009, 06:03:46 PM »

Quote from: Inkscars on March 09, 2009, 03:24:52 PM

Two Tired, one more question.
I'm measuring 14.5mm from the bottom of the carb to the flat surface on the float, However, do you measure with the carbs in the position as they would be on the bike, or laying down on their "backs"?

If I have a choice, I like to adjust the floats while the carbs are on their sides. You put the float valve in the seated position and then move the float so the tang *just * touches the float valve pin. This is where the float measurement should be @ specification. Bend the float tang to achieve this.

Cheers,

MickeyX · « **Reply #115 on:** March 09, 2009, 07:14:43 PM »

+1 on taking the inline filter off. As soon as Kit removed hers, it solved the air in the line problem and allowed the fuel to flow more freely. (mostly from the fact that the line needs to be kept short and to the point, no vertical bends that allow air to be trapped, or from a filter that is seating sideways instead of vertical. gravity is a wonderful thing in this case.)

TT gave you some great advice, as always. It will take some time and work, but I'd follow his advice to a T and not shortcut.

Can't wait to see that you've got her running.

Inkscars · « **Reply #116 on:** March 10, 2009, 05:34:23 AM »

Alright boils and ghouls, I took my time yesterday, and with a little help from everyone, i got them set up and got home around 6:30. I sat on the couch contemplating installing the carbs, but I had been so disappointed only a couple of days ago. At about 10:30 I was talked into going out into the downpour and seeking shelter in the garage for a cigarette. Ah, what the hell, what's the worst that'll happen? The same thing as before. Well, my battery is trash and won't fully charge (don't worry, I'm returning it under warranty today) so after muscling the carbs on, (who am i kidding, i needed help) i got all my lines tight, boots tight and pretty much anything else that could be tightened, tightened. Because I was going to have to kick it, I gave her a little shot of starting fluid in each carb and pulled my choke knob. Turned on gas.....made sure my stand was all the way down, grabbed her on her right side and KICKED! started up first shot. I couldn't shut my lower jaw for a minute. Then I look at the pan below my bike where the gas had been dumping out. Well, gas was coming out. Sh1t. So I pulled the bike up to riding position and gave her a little shake. The gas stopped and the idle became more consistent. Well, i've read aroudn on these forumns enough to look for some common problems. I knelt down next to her on the left side and tried to touch the pipes. first one, hot as hell, second one, hot as hell, 3rd on, not even bath water, 4th OUCH. Lifted the bike back up and gave to bowls a gentle tap, sat the bike back down, tried to touch the pipe that wasn't warm, AH SH1T! ok it's hot now. I need to make some adjustments to the carb, because when I try and take the choke off it tries to fall on it's face. BUT BUT BUT. She runs, and I'm so freaking happy. Thanks to everyone that helped. I've sure I'm gonna need mroe help though. Stick around and watch me screw up a fiberglass seat and try and get these turn signals to actually work. hahaha.

mystic_1 · « **Reply #117 on:** March 10, 2009, 06:02:57 AM »

Signs of life! Excellent.

A carb sync is probably in order soon, that should help with the idling and running without choke.

I should have said this before, but polishing the float hinge pins may help them not hang like that. Do that next time you have the carbs off for whatever reason.

mystic_1

Inkscars · « **Reply #118 on:** March 10, 2009, 06:13:59 AM »

Quote from: mystic_1 on March 10, 2009, 06:02:57 AM

I should have said this before, but polishing the float hinge pins may help them not hang like that. Do that next time you have the carbs off for whatever reason.

mystic_1

It's funny that you say that. When i was putting it all back together, i cleaned those as well and was chipping #$%* off of them. It didn't even OCCUR to me to sand them. well, if I'm careful, I can prolly get em back out without focking anything up.

mystic_1 · « **Reply #119 on:** March 10, 2009, 06:22:29 AM »

I'd go even further than sanding and actually polish them with mothers or something (after sanding if necessary). They're brass, should be able to polish them to a fine sheen. If they're really bad (pitted) then replace them. There can't be too much crap on them otherwise they wouldn't have slid out of the carbs easily.

mystic_1

78CB750CAFE · « **Reply #120 on:** March 10, 2009, 07:49:05 AM »

Isn't it the best feeling in the world when all the aggravation and frustration gives was to some real progress? Sounds like Elsa is coming to life finally, congratulations!

Inkscars · « **Reply #121 on:** March 10, 2009, 07:52:42 AM »

Thanks you guys.

Yes, i was a giddy little school girl last night. I couldn't sleep.
Hey, mine aren't brass. I guess they've been replaced?

Frankenkit · « **Reply #122 on:** March 10, 2009, 08:55:06 AM »

Grats!

This right here is the addictive part about these bikes. Things can go wrong relatively consistently, for freakin' ever, then something goes right and you feel SO good about it you find all that lost motivation to work on it again. It's a trap!

Good luck with your future endeavors! We'll be here to help!

My float hinge pins are some unidentified, possibly non-ferrous white metal, too. Go figure. I generally polish hinge pins, choke linkages, anything that needs to move by something, until it's nice and smooth at the mating surface (unless it needs some grip for the gasket, of course) and check distance tolerances to spec (like ya do).

I have yet to put my carbs back on because of finals.

I'll get to them, I will. Really.

Ecosse · « **Reply #123 on:** March 10, 2009, 09:13:48 AM »

Ink' I like (or hate depending on my mood

) reading threads like yours. It kicks my arse into servicing mine. I like saying the British 'servicing' for working on 'cause ya can sound dirty while talking about machinery.

Seriously, Glad to read of your success... and thanks for the kick.

754 · « **Reply #124 on:** March 10, 2009, 09:30:50 AM »

Dont sand the pins, will scratch them up.. try steel wool.

Any tank i ever use that I want to clean, I put in a handfull uf clean nuts & bolts.. shake the heck out of it.. anything that pulss of is just a problem waiting to happen..

Good luck on 3 .. its just a plugged jet or passage..

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Author Topic: My project thus far. "Elsa" (Read 84504 times)