Topic: Help, can't get carbs back on

[TheTussin]

Hi guys, new here. Need some help asap. Got my carbs off (I didn't take them off, they came that way) and I'm currently simmering my boots to soften them. But I don't know where my hoses go. I have a fuelfilter with a bit of hose, a length of orangish hose about 5 inches, and a longer thinner black hose. The black one has a tiny clamp on one end. Where do these attach? I only found one receptical on the carbs, but I don't know how to order the hoses. Also, I could use some help on attaching the throttle and choke cables. Thanks!

[Chester345]

Greetings!

First you'll have to tell us year and model of bike before help can be offered.

You may not have all the hoses you'll need if it came to you in pieces.

A little more info please.   

[Alan F.]

Hey there, welcome.  That's one heck of a first post, I'd like to recommend adding some pictures of your setup so that we can comment and point things out exactly the way you see them.

[jaknight]

Tussin,

Look at this, for 750 K4....... This is from, as said, the K4.... I don't know what you've got.....~ ~ ~ jaknight ~ ~ ~

Your fuel lines connect to the "Tees" between the 2 sets of carbs..... #1 & #2, then #3 & #4........ you should have 2 outlets on the bottom of your gas tank, behind the petcock with its off, on, reserve lever.  The 4 small hoses (#23) you see at the bottom of the pic are float bowl overflow tubes, not gas delivery tubes.

[TheTussin]

Hey guys, sorry I forgot to mention it's a '77 cb750F supersport. Truth be told I had the whole post typed then hit tab and it dissapeared for some reason. On my parents computer (I don't have a garage). so it's wonky. I'm going to call it a night in about 30 minutes so we'll see what happens by then. I'll have to post pictures when I get home tonight. Also I didn't get the bike in pieces, he just had the carbs off because he was cleaning them. I found a broken hose I have to replace, so I guess it's good I was waiting for them to boil, because I'm pretty sure it's oil-related, haha. I'll go take several pictures now, and post them when I get home. Thanks for the responses! I plan on being an active member here (I'm a forum junkie), and I'm going to cafe my bike.

Edit: Okay, here's some pics:



Those 3 are the hoses I have.

This is the one mount I found on the carbs

I have no idea what this is for, it's a lil bracketish thing with a screw


Don't know where these go :/

You can see the destroyed hose which, I believe goes to the top of the airbox? Not sure, isn't log enough to reach much else

This thing baffles me. Is threaded on the under-outside, feels thin, and I have no idea what it's for. Oil filter? That would mean the previous destroyed hose didn't go to the airbox...it's right below the battery, any idea?

This is, I'm assuming, for oil to the engine?


Here's just a couple pics of the bike, so you know what I'm workin with.

[jaknight]

Say Tussin,

I don't mean to talk down to you,..... if you are new to this, you can click on that pic in my posting...... it will enlarge and you can save it to your computer......

Just want to help you...

~ ~ ~ jaknight ~ ~ ~

[lordmoonpie]

OK - well here' my observations on the pictures so far.

Pic 1 - fuel filter, looks like it might be ok save for the orange pipe. If in doubt replace it, they're very cheap. If in lot sof doubt DO NOT start a thread on here about fuel filters     

Pic 2 - the hose is orange becasue it's knackered. I presume looking at it it's quite stiff to bend and not very pliable. That's years of being soaked in petrol - get some new petrol resistant hose from you rlocal supplier it shouldn't be more than a few bucks.

Pics 5,6,7, that bracket looks like the twin cable support bracket. The push pull cables from your throttle end in screws which have two small hex nuts on them. The screw at the end of each throttle cable rests in the turned over end of the bracket with a hex nut either side to adjust the screw up or down and tension the cable as you need it to get good free throttle action.

Pic 10 is the breather on the back of the cambox. This should have a pipe that goes back to the oil tank.

The other pics I can't really get a reference on where they are on the bike - bit too close up for me but I'm sure one of the other guys will know...

[750goes]

The picture of the top of the motor - is where a simple breather hose (probably the black one) is attached.. it runs down to the spare spot of that picture which has a small canister (under the airbox) that attaches there..

Just an observation - you seem to be missing the top breather cover that fits to the valve cover? or maybe I can't see it clearly....

[TheTussin]

Jaknight, I appreciate the image, but it's not the type of carbs I have. I have the F series, not the K.

Lordmoonpie, more than anything I need to know where to hook these hoses up, haha. I'll replace the orange one and the broken one today. So does the fuel filter and orange one run from the petcock to the intake I found on the carbs? Broken hose goes to top of airbox, and hole on top of engine goes to the unoccupied hole connected to next to the broken hose? Also I think you may be wrong about the bracket. The carbs have two other rotating disc things. The one circled on the bottom moves the (for lack of better word) butterfly valves, and the one to the left of it moves the...umm..big shafts? inside behind the valves.

See what I mean?

750goes, not sure what you're referring to, could someone elaborate?

Thanks everyone for your posts so far! I'm determined to get this figured out. Now to download a manual.

[TheTussin]

Bump, hope you guys don't mind bumps

[hapakev]

In the last pic, the bracketish thing, is where your choke cable mounts or is held.  The hex nut is probably from one of the throttle cables to adjust tension.  I just put mine back together (78 CB750f same bike/carbs) and am trying to remember if the nut is at the carbs.

The black hose is a vent fro the carbs, it drapes over the airbox?  The oil pump looking thing is emissions equipment and I ripped all that sh!t out of mine.  The orange hose was part of that and connected from the engine breather to another hose near the gas tank that then attaches to the emissions pump thing. 

[upperlake04]

 In your last pic your finger is touching the choke cable housing clamp, the small circle is where the choke cable end barrel attaches. The large circle is for the throttle. The push cable goes on top and the pull (for opening the throttle) is on the bottom. I can take more pics if you need them.

[750goes]

In the middle of your valve cover, there is a breather cap - held on by three screws - that vent tube attaches to the back of it..

I could not see the breather cap.......that's all..

[TheTussin]

Bamp

[upperlake04]

Bamp

   Lots of good replies to your questions. What else do you want?       

[TheTussin]

In my 6th image, where do those pieces go? Someone said the nut-thing could be for throttle cable free-play. But what's the other one?

Very noob question, what is a valve cover? Can someone highlight it in my picture, or post one of it?

Are there actually two separate throttle cables? One push one pull?

And I want to be sure about this device:

Someone said it was part of emissions control? Am I missing a piece that screws on underneath, or is just for CA? Also, the hose on the top should go to the top of my airbox and the spot on bottom needs a hose going to the breather tube seen here?:

I apologize for asking so many questions, but I don't wanna start this thing up (if I can ever get my freaking carb boots back on!) and have it a-splode on me.

[upperlake04]

 Your 6th image is of the plate that holds the ends of the throttle cables. It has a two holes on one end, the small one fits over a registering pin  and the other is for the screw that fastens the plate to the right side of carb 2 (viewed while sitting on the bike). These carbs have two cables, called push/pull but it seems both pull. The push, which attaches to the top of the 'disc' is a safety device in case the spring that returns the carb slides to idle breaks.






This pic is from the Owners Manual, the 'breather element case', the  emissions control device looks like this..



There are three hoses attached to it. The bottom one is routed to drain to the ground, the top attaches to the airbox and the side hose runs to the nipple on the back of the valve cover, beside your thumb in your last pic.