Huge carb problem.... please help 1985 xj700

Ok so i pulled the carbs off to do a rebuild. They needed a little tlc so i was thinking i would help my bike out. It's an 85 xj700 standard maxim. Pulled the bowls off of the bottom and went to unscrew one of the needle valves and SNAP one of the posts that the float sits on breaks off. So i am in desperate need of a new carb/ set of carbs/ carb body to replace it with.

after that i need to get a yics tool, or borrow, or rent one

and a synch tool.

if anyone knows of a set for sale, or another machine that this carb has been used on so i can find another carb.

I have a set of carbs off a maxim x that i am willing to trade.. and/or for sale.

I am in the south jersey area (medford) and any and all help is welcomed and appreciated.

thanks in advance guys, its nice to see these bikes have a following

 

There was a similiar recent thread on this:

http://www.xjbikes.com/Forums/viewtopic/t=854.html

You may be able to repair that post rather than get new carbs, it might be worth a try.

 

I'd recommend you go to a "salvage" shop, they'll have many old carbs which have identical "guts" to yours. Surely you'll find exactly the part you need. I found a whole carb system from a fz600 for $40 at a salvage shop.

As for the carb sync tool, it's not necessary. One user on another forum described getting a clear vinyl hose, pour some engine oil in it, such that it sits in the middle of the hose. Then connect the hose to the intake ports of two cylinders. The engine should already be warmed up. If the oil in the middle moves towards one of the cylinders, then that's the one with more vacuum. The idea is that you sync two carbs at a time: #3 and #4, #1 and #2, and left bank with right bank. While I haven't tried it, I don't see why it should not work.

Good luck!

 

Why not just use the Mikuni's! After having worked on both kinds now, I think they are better. It will just take a little more tuning...

 

what does it take to run the mikunis? do i have to go through a bunch of jetting work, or can i just put them on, synch them and go?

 

anyone have any other ideas? I am about to get ahold of a carb body from an hsc32 see if there is any way to swap it in.

if i could find the broken piece i could weld it back on, just a little aluminum tack.

 

I didn't see this thread till now ...
Having opened up both an X and a air max, No reason why they wont fit ... but manifolds and air box boots are different. BTW no real reason they wont cross fit either ... but air max has short manifolds and longish air box boots. Max X the other way around. Now bore spacing and diameter are what determine if it will fit really ... and those I need to measure ... maybe I will on saturday ... the wrecking yard I go to has both sets of carbs. The X's are for sale the air ones aren't ... anyway I can check.
Cool.
Srinath.

 

if you could check that would be great. I was goingto be switching over to individual air filtrs on top of the carbs, ditching the air box completely so i think if the spacing and venturi size are the same, they should fit in.

i would still rather just get an original set on the bike just because i want to get the bike running again and leave it alone.

so if they are willing to sell the air max carbs that would be awesome, i only really ned one though.

 

Air max stuff is someone elses that they are working on ...
BUT if you have both sets ... see if they fit ...
Venturi diameter should be close and will not matter a whole lot ... you jet it to work ... I'll suggest an O2 sensor in the pipe and ride it on the road with a multimeter velcroed to the tank ...
However back to your problem ... if they have the same spacing and the mouth diameter is the same ... you should slide it on and work on jetting it.
If that isn't the case ... if spacing is off ... you could rack the X's carbs on the air max.
If diameter is off ... you're screwed ... a manifold swap over may be possible but I would worry that it also may not work ... especially if the head has the holes in different locations.
Now I have a near complete (3 out of 4 are good, 4th is bad, but OK for fitting and checking) manifold set off an X. I'll send you those if you cannot swap in the X's carbs on the air max's manifolds ... Yes I'll check the carb port spacing before I send it ...
Cool.
Srinath.

 

i am only going to buy another set of carbs if they are for an air max, i only got ahold of these because the guy that had them before me didnt know if they were off an x or air max, sent me bad pics so i just grabbed them. I would much rather repair/replace the air carbs because i am just getting the bike running and parking it. The bike is my fathers old bike and it means a lot to him. However it has been a huge POS to me and i am sick of dealing with it.

i am buying myself another bike as soon as i can, just trying to get this one out of my hair.

 

Ok I will see if the guys have air max carbs ...
I will try and see if the water one and air one are close ...
Cool.
Srinath.

 

yes, thanks very much for your help.

its nice to find people on forums that are willing to actually help, and not just tell you how its a common problem, or something just not at all worth doing, or just giving you a tutorial of how to do a forum search.

your help is greatly appreciated.

 

Are the older max's carbs the same ... and are radian carbs the same.
Anyone know ... cos I know he has some of those he is parting out ... except carbs are all over in a shelf/pile ... so we cannot tell for sure.
Yea I am carb man ... i live for carbs ... :lol:
Cool.
Srinath.

 

all i know is that the carb is a hitachi hsc33, the older maxims have hsc32's. I found a guy that has an hsc32 body that he will give me for shipping charges. I was thinking if the broken post is the same i might just break then one off the hsc32 and weld the post into the hsc33.

we'll see, i just need to find something. i will try to quickly bolt up the x-carbs i have soemtime this weekend and go from there.

i was thinking about going to some pod filters, really get the itb screaming sound, but i think i am going to just put the airbox back in

 

Just a thought, if your willing to tack weld the broken piece back into place, couldn't you just find a rectangular chunk of aluminum and tack that into place instead?

 

i have been thining about doing just that as well, just need to find the right peice, and figure out the siz of hole that needs to be put in, its pretty tiny though.