Slide slide slippity-slide

So polishing up the slides that were on the '76 carbs didn't work out so well. I still have surging RPM's off-idle. Frustrated, I said fuck it and scrapped them altogether.

But I do have an ace up my sleeve.

I just pulled these beauties off a (for parts) set of 755A carbs.

See that scallop cut in the bottom of these? Yea that means they're more badass than the flat bottomed girls I yanked out. It also means they'll allow for more airflow, particularly at full throttle.

The best part about these is they're a complete set of matching tops and slides with no damage or scrapes.
They were a bit dirty though.

...and after 5 hours of polishing: (my forearms look like Popeye's)

The needles buffed out nicely.

I really hope these do the trick. I've been on a wild goose chase for about a week now hunting down one problem after another with this bike. This past weekend alone I've had the carbs on and off the bike 5 times.

**Update10/19**

The bike starts and idles fine, but still seems a bit slow to decrease RPM's.

I'm going to set the timing dynamicallty, then try and sync the carbs as best I can and see if that makes a difference. 

I already swapped the #115 slow air jets for #110's. It was quirky at first but eventually I got the idle adjusted and now it idles strong.

Carburetors EVERYWHERE!

It seems that I've seen a lot of sets of carburetors come and go lately. I think at any given time I have at least a dozen sets lying around.
Off the top of my head I think I've got

• 3 complete sets of  '75 GL1000 carbs
• a set of '78 GL1000 carbs
• and a set of '76 GL1000 carbs plus a box of random parts/bodies.
• 2 or 3 sets of early CB750 carbs plus a few boxes full of spare parts/bodies
• a couple sets of later (PD42 A and B) CB750 carbs
• 2 sets of XS650 carbs
• a set of Keihin CR29's
• A set of CB400 carbs
• oops I forgot one; another set of PD42 B's (Elrich's F2 carbs)
• I'm sure there's more I just can't remember.

I like to do multiple sets of carbs at once. That way I'm not wasting chemicals when I use my ultrasonic cleaner. I can just reuse the cleaner several times in a row on different sets of carbs. Because of this approach, sometimes the workbench can get a bit cluttered. Here's a little taste of my carburetor chaos.

I was given a couple sets of CB900 C carbs to build a single good set out of. I tore into them and discovered that all one of the sets really needed was new gaskets, an accelerator pump diaphragm, and a float hinge pin.
So now they're sitting off to the side waiting for parts to arrive in the mail.

This box makes it easy to keep everything organized.

In the meantime, I'll be rebuilding a set of '76 GL1000 carbs (Keihin 758 A's) So I can get my Goldwing ready for the Graves Mountain ride next weekend. These suckers are huge, there's a freakin' TON of parts and they are currently occupying my workbench in it's entirety.

Oh... just a couple spare sets laying around.

Yes the Goldwing has only 4 cylinders,
I pulled a couple spare carbs to scavenge for parts.

Like I said, this thing REALLY comes in handy.

Cleaning BS-34 Carbs From the '81 XS650

Alright kiddies listen up. This is why you don't leave gas sitting in your carbs for years.

Fortunately there is a solution to remedy the error of your ways; the ultrasonic cleaner!

It's always worse than you thought.

Most of the glue was on the carb on the left.
Note the large yellow line of gunk dripping from the top center of the carb body.

I pulled the (horrible) Mikuni BS38CV carbs off of tommy's xs650 on Saturday.
I thought it would be bad, but not this bad.

It only took me about 2 hours to scrape off all the gorilla glue from the outsides of the carb bodies, the throttle linkages, float bowls etc.
The insides didn't escape the previous owners glue fetish either. The vacuum boot for the slide was nice and coated. There was glue in the needle jet, venturi and float bowl. Although, I am forced to admit that he did a good job of plugging those pesky pilot jets as well. Not a problem if you live life at wide open throttle.

Everything is clean including the disturbing amount of rust and oxidation inside the carbs thanks to my new ultrasonic cleaner, a brass brush, and a lot of patience.

If I ever see this bikes previous owner again I'd like to kick him in the teeth.

4/09/10 update: I'm still finding glue bits.
4/20/10 update: Even more glue found all over motor and in between cooling fins.