91 carbs on an 87?

hey guys i just picked up non running 87 700 and when i got it home i realized the carb mounting tabs were broken and the they weren't opening because they are so gummed up. i'm gonna replace the carbs, i found a set for a pretty good price but they are from a 92 750 will these work on an 87 700. thanks

 

What are mounting tabs ??

I 'm guessing they won't fit on your bike......but can't say why.

 

if you look in the center the tab that holds the carbs together is snapped off. do you think it would be possible to weld a piece of metal on there and the just drill a hole through it?

 

You have screwed the pooch.As stated in a previous post...a dalmatian.If you still have all the springs , I am running short, send them to me and I will fix them as I have a spare set of carb bodies thanks to Supertex. Send seals to if you want me to fix them.

 

And for the record, that is why the manifold should not be removed.One of many reasons.

 

You do not need to worry about that mounting tab. There is plenty other things holding the carbs in place.
Gummed up ? Just get a can of carb spray and a can of WD-40 and start spraying the carbs.
Have someone show you . Use a old tooth brush and wear safety glasses.
The idle jets will have to be cleared out and that requires a VERY small drill bit which you can turn by your fingers to clear the idle jet.
You can determine the drill size by Goggle ing "Drill jet sizes" and then look at the chart.
Dremel sells some of those small drills. Or go to a hobby supply and get them. Easy to do.
A #38 idle jet requires a .014 thousandths VERY SMALL size drill to keep from making the hole too large.
Check your idle jet size. It is stamped on the side of the jet.
Remember just turn the drill bit by hand and use carb cleaner. Or soak the jets in carb cleaner overnight in a place that
won't set fire to the house. Put a lid on the container so it does not evaporate.

Do NOT take the carbs all apart.
JUST remove the float bowl and idle jet and main jet and THATS IT.
Check the vacuum diaphrams for slits and don't forget to carefully check the float needles when you have the float bowls off.

BTW....The carbs look like they are sitting in mud????

Get a PIN VISE HOLDER here:
http://cgi.ebay.com.au/30PCE-HSS-MI..._Accessories?hash=item3efdb2302f#ht_546wt_924

 

No.....carb metal cannot be welded.

You might be able to use a big-ass washer on the remains of the tab to fasten the carbs together, but you mave lost a few springs from the assembly cuz a duffus removed the airbox base from the carb set, not a good idea.

 

There are many other things to be concerned about if the carbs were tweaked enough to snap the tab. The choke rods , carb linkage and springs as well as the linkage from carb to carb. After the manifold is back on, all will need to be checked to verify that they do not hang up during normal operation. As stated by many before me, DO NOT REMOVE THE MANIFOLD UNLESS YOU HAVE TO!

 

thanks for the info guys. im kinda concerned about the carbs its evident that someone tried to disassembled them, some of the screws that hold the throttle plates to the shaft are a little rounded, i think i read somewhere that you should never take the screws out because they are staked. i hope they are not totaly screwed because its seems hard to find a new set. when you say the manifold are you talking about the base that connects the carbs to the airbox?
btw they are not sitting in mud just a really dirty garage floor

 

Yes, the top plate that connects them together should never be removed unless the pope,the president and oprah say so.

 

Back to his original question.......

TOE, do you know why the '91 carbs won't work on his '87 ??

I don't think they'll work but don't exactly know why.