"ATTN: RickCoMatic82 !!! 750 Or anyone! maxim float?

I've been reading the posts from everyone about measurinf the 17.5mm heaght of the floats...but after that i'm still confused..people have said "measure from the lip of the carb bod to the bottom of the float...I am not sure if they mean the "raised portion that the float bowl sits inside on of just below it where the gasket is seated???/ Also which part of the float?? the very top of the half with or with out the armature? meaning is it measured from the side view where you can see the cant of the float going up or down? or the end or what?? I really could use a pictuer I guess cause I'm a little....S....l.....o....w..... Plase help!!

 

have the carbs upside down on a bench. You then have to put the carbs on a 60 to 70 degree angle so the bridge of the float does not compress the spring in the float valve. has to be just sitting on the pin on the float valve. Then with the gasket removed measure from where the gasket sits to the top on the float. The black things. Measure in the middle of the black thing to where the gasket sits. to get the 17.5 you ahve to bend the little tab or "bridge".

 

See I understand what the black things are and what they do...lol..my question was just that, wondering if i set the ruler on the ledge or just below..thanks! also when you say center...do you mean from the side of the carb and to the very middle of the float meaning not the valve/needle end or the opposite but right smack in the middle? Way I have it on the end is about 19mm and the valve side is like 14mm?

 

Great, now I am confused. Where is this middle top? I agree with randall, we need a picture.

 

Let me try and make this a little bit easier.
Measure the Float Heights using the HOSE Connected Method and see which is closest to being at the correct Float Height.

If you don't have any on the money ... bend the Tab of the one closest to correct and try again until you get a the correct level doing the Hose connected test.

Make that Float Height the Base.

Drain all.
Measure the correct one.
Turn the Carbs upside-down so that the Floats are closing the Valves.

Using a Memchanics Scale.
Measure the Height of the Float Bracket between the two Floats from the Body -- sighting across the bridging and getting the Height Value.

Then, with that value ...
Set the other three to that same height ... bending the Tang, as needed.

Trying to set the Floats with them NOT in and upside-down configuration is too difficult and not as precise.

Once you have the all the Floats at the same Height ... redo the Hose test.
ALL four should be at the identical height if you measured the bridge to body height correctly.

(Everybody has their own way of doing this adjustment and all work if you know your system and stick the Tangs at the right bend to achieve the right fluid level across the board.)

Trying to measure the Floats rather than the bridge between them is where the inaccuracies come into play.

 

Thing is the carbs are off the bike and bike is far from running at this point..so I'm trying to bench it. I've done this before in a few other bikes.. Goldwing, vf750 etc. But I had a pic to look at to let me see what I needed as far as position of the ruler etc..

 

Ok, I did I believe what i read but the problem is the floats are doing a wheelie and this is at 16mm if i go to 17.5 it will really be doing canted..Is this right?? heres a couple pics..

http://img.photobucket.com/albums/v679/ ... ats003.jpg

http://img.photobucket.com/albums/v679/ ... ats002.jpg

 

First, get a Mechanics Ruler with highly accurate gradient:



Sight across the top of the Float with the ruler touching the Carb Body at the base of the Main Jet & Emulsion Tube Casting:



Get a Highly accurate measurement of the Float Height that was CORRECT when you did a Hose Hook-Up Test:



That is your BASE Reading.
Using the same Value recorded when you measured the CORRECT One ...
Set the other three to the SAME Height on your scale ... sighting the metal bridging between the two Floats.

You've Float Height Synced.
Do a Hose Hook-up Test and check your work!

(Nasty Parts Carbs used for illustration. I'm out of Cleaner or I'd have made the Pix nicer!)

 

That would be great if the bike had ever been running since ive had it..i bought it with the carbs fouled up not running well ...so thanks for the pic but this method would not help me also the way you have the ruler set is so different from everything else ive read?? now i'm really confused'....

 

The bottom line is getting the Fuel Height to be at about the Lock Washer on the Fasteners that secure the Float Bowl to the Carb Body.

You can Muscle it or you can do it with finesse.
But you want to end-up with your Pilot and Main Jet immersed in a Fuel Level that is as high as the washer when you are doing a Hose hook-up test.

Like this:

 

Thanks fo rthe pic Rick but I'm going to have to do the whole 17.5mm bench adjustment first before i put fuel it back on my bike.. From the pics I have linked does it look like the angle of the floats is too canted to the left? I always thought they were right if they were just slightly at an angle almost parallel with the carb lip/ledge? but that would be a measurement of about 12mm if they were.??? what do you think?

 

randall,

You're pretty close. You measure from the edge of the mixing chamber, not the gasket surface. You are measuring at the correct spot though.

Let them be canted.

 

oK....You say mixing chamber but im the right spot? Help..what is the mixing chabber...which way to go left right ..by my pic?

 

I was just about to post some pictures with little arrows pointing to different areas so that we could get this figured out... But now I don't have to.
Thanks goes out to RickCoMatic for the excellent photos and illistration.

 

Not down on the gasket surface. Up on the little lip that is around it.

 

Ok, I think i know what is going on with the failure to run off of choke. I have read and applied the 17.5mm measurement from where the gasket would sit(without gasket of course and the level(when using the leveled carb body and priming the carbs) was about 4mm below where it is supposed to sit(3mm area). I read that i'm supposed to measure it from the edge(the higher part that surrounds the carb body bent the tabs, and got it to 17.5mm again(this time the floats are doing a serious wheelie) took another measurement and the level just got lower. now i'm 5-6 mm lower than where i should be. So, It looks like 14-15mm from the edge is where it should actually be for the pilot jet to be submerged? What the heck? So if i follow the haynes manual and get it to 17.5 from either the carb lip(where teh gasket would sit or the edge it's giving me a very low fuel level.
As well when i turn the carbs back right side up(with the float bowls off to observe movement of the float needle, and there isn;t any movement at all. Are these needles supposed to only allow the little spring plunger inside the needle to let the flow of fuel in? In other words does that needle move other than what the spring on it lets it? What an ordeal!!!!

 

Float needles should move noticeably.

The spring plunger in them is to protect the needle tip when bumps bounce the floats.

 

Ok so that means that 17.5 mm is all wrong then...14 would be better because with 17.5 there is no mevement at all in the needle

 

So i am either measuring from the wrong area or somthing else is going on

 

But how much movement should they have as I have noticed the same thing when I install two aftermarket needle and seats. Since the aftermarket needles are 1 mm taller, should I adjust them to 18.5mm or 16.5mm?

 

Well, 16.5 would be the right answer but mine are stock type needles...so what i'm wondering is if im really supposed to measure at the very end and top of the float...meaning at the very edge? that would be like 14.5 mm in the middle and 17.5 at the end?/

 

OK, not to completely steal the thread but how about the float settings on the Mikuni Carbs for the Seca Turbo models?

Sean

 

I have no idea about the seca man...But anyway I've set the carb floats back down and am goind to take a fuel reading...I'll let everyone know what i find..

 

Float height should be the same regardless of the needle. It's the fuel on the float that controls the needle.

If I recall correctly, my floats end up pretty much horizontal at 17.5mm. It's been awhile since I've been in there though..........

 

mine are far from horizontal at 17.5...maybe i do have aftermarket needle?

 

If you have a spring loaded needle ... you've had somebody replace them before.

If you take a Height reading off the Float that showed the level at the washer during the Hose test ... and set them all to the Height of the one known to be correct ... you should be spot on with all of them.