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Author Topic: Carb Slow Jet 750K7  (Read 3103 times)

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bowhunter

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Carb Slow Jet 750K7
« on: August 05, 2005, 07:10:35 PM »
After 2 complete tear-downs of these carbs for cleaning, I'm still having a problem with the slow speed jets. The adjusting screw
seems to have no affect in increasing or decreasing idle speeds as described in my Clymer's manual. That applies to all four carbs.
My next attempt would be to drill out the plugs to try clean out the gunk which is probably in there. After cleaning, where can I get replacement plugs for the cross-drilled passages? Or is there another way to open those passages? ???

By the way, after a dozen or so Remove and Replace operations, I can do the install in under 30 minutes, including the factory air cleaner. I am going to have to replace the clamp screws soon before they get completely stripped. ;D

Bowhunter
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eldar

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Re: Carb Slow Jet 750K7
« Reply #1 on: August 05, 2005, 07:28:17 PM »
You need to get some wire that is small enough to fit in the jets. This cvan be used to gently scrape the jets out. Only drill if you have the PROPER size bit. You may not hear much of a change with the fuel mix screw. Thats why a tach is used to set the low speed mix.
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eldar

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Re: Carb Slow Jet 750K7
« Reply #2 on: August 05, 2005, 07:29:03 PM »
Forgot this, after cleaning use some seafoam to help finish the job. It is a gas additive that works wonders.
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Offline Quail "Owner of the comfortable k8"

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Re: Carb Slow Jet 750K7
« Reply #3 on: August 05, 2005, 08:52:18 PM »
What is seafoam? where do you find it.
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These wonderful little birds are great flyers, delicious eating, excellent for training your hunting dog, and just fun to shoot,or stuff and keep around the house.  Bobwhites can be put with other types of Quail and have very large penis's.  Quail are very popular with the babes.

Offline TwoTired

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Re: Carb Slow Jet 750K7
« Reply #4 on: August 05, 2005, 10:48:10 PM »
Bowhunter,
Did your complete teardown also include removing the slow jets and cleaning the small emulsion tube attached to the slow jet??
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Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

eldar

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Re: Carb Slow Jet 750K7
« Reply #5 on: August 06, 2005, 07:36:05 AM »
You can get seafoam at most hardware stores such as Macs Hardware and many auto stores have it as well.
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bowhunter

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Re: Carb Slow Jet 750K7
« Reply #6 on: August 06, 2005, 08:27:40 AM »
Quote from: TwoTired on August 05, 2005, 10:48:10 PM
Bowhunter,
Did your complete teardown also include removing the slow jets and cleaning the small emulsion tube attached to the slow jet??
According to my Clymer's, the slow jet isn't removable. Or is it? The pictures supplied are not very clear on this. Does anyone have a good parts breakdown on these carbs? 

Bowhunter
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Offline TwoTired

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Re: Carb Slow Jet 750K7
« Reply #7 on: August 06, 2005, 09:22:42 AM »
The slow jets ar not screw in type, but are pressed in.  So, they aren't easily removeable. However, they can be removed cleaned and tapped back into place.

It's your judgement call.  But, if the slow jet emulsion tube cross drilled holes (tiny) are plugged, it does seem like the idle mixture screw wouldn't behave properly, as that is down stream in the slow circuit flow.

Good luck,
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Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Buffo

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Re: Carb Slow Jet 750K7
« Reply #8 on: August 06, 2005, 03:05:25 PM »
I have the pressed in slow jjets and I got mine out pretty easy. just a good set of pliers. make sure you TWIST the jet and dont wobble the jet back and forth...Twist and pull, twist and pull

Don
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bowhunter

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Re: Carb Slow Jet 750K7
« Reply #9 on: August 07, 2005, 05:40:28 PM »
Final (Hopefully) update. Pulled the slow jets,as suggested. They were about half plugged, although with that tiny hole, it's hard to tell especiially with bi-focals! ;D. Guess what. Very few places carry drill bits small enough (#74) in stock. DUH!! I got lucky in that I found that one of my wire brushes had wires of  .015 diameter! after spending some time straightening the wire (why do they have to put all those kinks into them?) I was able to clear the clogs on the slow jets. Re-assembled everything, opened the fuel valve, set the choke, and hit the starter switch. 2 cranks and she was idling! ;D Spent some time tweaking the low speed idle jets, and now it looks like I may be able to take her for a ride tomorrow.

Thanks to all who gave advice and inspiration! 8)

Bowhunter

If I can get her cleaned up and presentable after the ride tomorrow, I'll post a Pic. Thanks again everyone!
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the_genrl

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Re: Carb Slow Jet 750K7
« Reply #10 on: August 07, 2005, 08:51:45 PM »
good to hear! 

also, wondering what tool you are using to adjust the screws?  i had to cut a peice of sheetmetal 1"X1 1/2" and bend half of it so it makes a flathead bit on one end, but still is wide at the other (for torque).  then grind the bit down to like, 1/4".   its crappy, but does the job.

my stubby screwdrivers were too bulky to fit in there, ESPECIALY the #2.  Good luck with that one!
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Offline Quail "Owner of the comfortable k8"

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Re: Carb Slow Jet 750K7
« Reply #11 on: August 08, 2005, 06:45:38 AM »
For drill bits needed for jets go see you local jeweler.
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These wonderful little birds are great flyers, delicious eating, excellent for training your hunting dog, and just fun to shoot,or stuff and keep around the house.  Bobwhites can be put with other types of Quail and have very large penis's.  Quail are very popular with the babes.

bowhunter

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Re: Carb Slow Jet 750K7
« Reply #12 on: August 08, 2005, 07:15:10 PM »
Quote from: the_genrl on August 07, 2005, 08:51:45 PM
good to hear! 

also, wondering what tool you are using to adjust the screws?  i had to cut a peice of sheetmetal 1"X1 1/2" and bend half of it so it makes a flathead bit on one end, but still is wide at the other (for torque).  then grind the bit down to like, 1/4".   its crappy, but does the job.

my stubby screwdrivers were too bulky to fit in there, ESPECIALY the #2.  Good luck with that one!

For adjusting the screws, I used a 4 short pieces of windshield wiper hose about 1/3 less diameter than the screw head. As long as the screws turn easily, the hose will change the screw position. As a side note, don't leave the hose in place, if any gas leaks on it, the hose will swell and lose it's grip! ::) It's  a whole bunch easier that trying to alighn a screwdriver to the slot in a very awkward position. Did I mention I wear bifocals? ;D

Good Luck!

Bowhunter
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Offline Joe Danger

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Re: Carb Slow Jet 750K7
« Reply #13 on: August 09, 2005, 06:12:13 AM »
I went to Sears and bought a $1.99 finger driver with a flathead bit, it's anodized blue and knurled for grip, it's perfect for getting at my fuel screws.  I rebuilt my number 4, and didn't quite have the stones to pull that slow jet, but a good blow-out with compressed air and a mix of seafoam into the fuel line did the work for me just fine.

I can't reiterate enough, though, when people say get the timing spot on before you touch the carbs, they mean it.  Made an incredible difference in rideability, starting, and mixture.
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Offline Quail "Owner of the comfortable k8"

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Re: Carb Slow Jet 750K7
« Reply #14 on: August 09, 2005, 07:30:22 PM »
Once again I ask where do you get this seafoam?
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These wonderful little birds are great flyers, delicious eating, excellent for training your hunting dog, and just fun to shoot,or stuff and keep around the house.  Bobwhites can be put with other types of Quail and have very large penis's.  Quail are very popular with the babes.

eldar

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Re: Carb Slow Jet 750K7
« Reply #15 on: August 09, 2005, 07:33:06 PM »
I dont know what you have for auto stores but most of those will carry the seafoam. Some hardware stores carry it as well. Here we have a place called Macs and they have it. So just check with auto parts stores and hardware shops. Give them a call and they should be able to tell you. It is about $5 a can +- $1. I can does about 2 -3 tanks depending on how much you dump in.
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Offline Quail "Owner of the comfortable k8"

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Re: Carb Slow Jet 750K7
« Reply #16 on: August 09, 2005, 08:36:04 PM »
eldar 
 
 
where are you at.  Using USA, planet earth as a reference point.
Terry
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These wonderful little birds are great flyers, delicious eating, excellent for training your hunting dog, and just fun to shoot,or stuff and keep around the house.  Bobwhites can be put with other types of Quail and have very large penis's.  Quail are very popular with the babes.

eldar

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Re: Carb Slow Jet 750K7
« Reply #17 on: August 10, 2005, 01:48:03 PM »
I am in North Dakota. Fargo right now.
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bhassell

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Re: Carb Slow Jet 750K7
« Reply #18 on: November 12, 2005, 05:13:45 PM »
I found it at Autozone here in La.  Website listed Advance Autoparts, NAPA among several Big Name outlets....Autozone was not listed and was pleasantly surprised. 
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theunrulychef

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Re: Carb Slow Jet 750K7
« Reply #19 on: November 13, 2005, 06:35:40 AM »
I have a good tip for turning the idle air screws for people with large hands such as myself.  I took 4 male electrical blade connectors (the kind with the blue plastic sleeve - 14-16 guage I think) & stuck the "wire end" of the connector onto the idle screw.  Now I can actually bend down & adjust the screws while sitting on the bike at the side of the road.  Since the blade connector is flat-ish, you can easily see how many turns you're doing.  Also, these have been on my bike for about 3 weeks now & haven't melted or fallen off.  I would probably recommend taking them off when you're done fiddling though just to make sure.  Not only that, you can see the ones on the outside carbs if you look close enough. 
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