Ummm... Carb Questions ;-)

So I screwed up a small bit while cleaning my carbs - I mixed up my float bowls when I boiled them in lemon juice ;-(.. Any special way to tell which is which, or doesn't it matter?

With that thought, I have 2 additional questions... 1 is - on two of these bowls, where the drain screws go - once side is competely smooth and doesn't look like a screw goes in there...?? (see pic)....

The other question is regarding the other picture attached.. I have a screw extractor I am going to try on these drain screws (they are ALL shot), but.. It looks like the PO tried doing something before and snapped the head of the screw (see pic)... how I get this one out??

any help appreciated!!

thanks!!

 

top of the sticky list in xj chat, the other looks like some sort of plug, it will have to come out to see if there is a screw inside.

 

Hey the carb bowls look great. There should be two left drain bowls and two rights. Set them back on your carb bodys and you'll see which way they go. Just remember the drain screws go outwards so you could get a scew driver or (allen wrench - Chacal's after market drain screws).

As far as getting those stuck drain screws out, Just follow the sticky on that.

 

The problem with the instructions; is i can't really use a extractor when the screw doesn't have a head.....

guess i gotta try to drill it out.. ::gulp::

 

no head is not a problem, it's the thread your removing.

 

Sure you can -- you just need the right kind of extractor. Try this one:

http://www.irwin.com/irwin/consumer/jht ... Prod100503

 

You don't need the head to extract a screw. Just use a smaller extractor bit. As a matter of fact, nine times out of ten, when you are extracting a headless screw, it is easier than one with the head still on becuase there is no longer any torque on the threads.

 

Suggest you drill a small hole to give the extractor something to catch on to, then use a varible speed reversing drill to put the extractor in and the screw should come out easily.

 

So for that top picture i posted, where it looks like a cap or something is in the hole.. is that supposed to be like that?? Or is that someone just capped it and I have to drill it out??

I will pick up some fine tip extractors in the next day or two for the screw and will let you all know how i make out ;-P

 

I hven't seen a plug in the drain screw hole before, perhaps someone else could give some input on this......

 

On the "double-outlet" Hitachi bowls (used on most of the HSC32 series carbs), one outlet is threaded and accepts the drain screw, and the other side is plugged with an inverted cap to seal off the opening permanently. In this manner, one physical unit of production could be easily machined to make the two separate (LH or RH) bowls.

In the later years of production, Hitachi started casting separate LH and RH bowls, that only had a single outlet, and thus there was no mistaking the LH and RH bowls.

 

I think if you look at the bottom of the carb bowls (it least mine) the cating is made to be machined for either left or right hand bowls. The plug you are reffering to is the casting is not machined on that side to accept a drain screw. I have never seen a cap over a drain screw. If you don't have a drain screw on the other side it could be used as an inner bowl since it is hard to get a plastic tube on there to check the float level anyway. Good Luck with that screw extractor.

 

Two of the float bowls have this - one side is screw, the other side is inverted cap..so I am to assume then that one is the interior right and the other is the interior left (carb 2 & 3), and the side with the screw faces out and the inverted cap faces in...... yes?

 

Left side bowls are used on carbs #1 and 2, and the right side bowls are used on carbs #3 and 4. In this manner, the drain screws will all be facing the "outside" of the bike for easier access to the drain screws while the carbs are installed on the bike.

 

Ok.. I think I am good - on to the extraction!

Chacal - get ready for a BIG order from me soon ;-P these things are going to need almost 'everything' replaced ;-(... and tools... oh yeah.. lots of tools.. (but honey.. i need them to fix this bike...) ;-)

 

I didn't even notice that in the picture before. Maybe he doesn't need to remove anything after all...?

My 750 has the later ones, then. I remember when I was swapping out the drain screws, and two of them didn't want to let go, that I drilled a hole through the head and tapped in the Irwin extractor. The screw actually came out rather easily.