81 Special

Yes, the Special frame rides and handles nicely. I think the more laid down shock angle triangulates better and makes for a stiffer rear end mount. I added the stiffer TX750 swingarm to mine but it didn't seem to make as much of a difference as it did on my '78 Standard. The 16" rear wheel also rides and handles nicely. I switched to an 18" shortly after getting the bike because I read it handled better, basically steered quicker. Well, I didn't find that to be true. The 16" doesn't hurt the steering and is actually more stable at speed, and it looks better on the bike in my opinion. So, I've switched back.

Yes, the stock handlebars gotta go, lol. I like the Euro bar bend and put them on all my bikes. Lower but not too low, and the way they droop down slightly on the ends is very, very comfortable. It turns your wrists to a more natural (and comfortable) angle. The front forks can be "fixed" by doing the Minton Mods to them, adding about a 3/4" preload spacer, and about one ounce more oil. A fork brace helps as well. The front brake can be "fixed" by drilling the disc, changing to a one piece stainless line, installing better pads, and switching to a slightly smaller MC. For the seat, a 1980 one will swap right on and doesn't have the huge (ugly) hump, lol.

NewWheelMounted3.jpg


NewWheelMounted4.jpg


NewWheelMounted6.jpg
 
View attachment 258714
I hate to be a wet sock, but I'm pretty sure the #60 bit was WAY too big.
I tested the orifice with a #71 bit, and even it was too big. I couldn't further easily do testing with my micro-bits because #72 and smaller bits aren't long enough.
I have always used a single strand of copper wire, about the equivalent thickness of a #79 bit, to clean out choke orifices. It takes repeated stabbing to find the actual orifice -- first, the pick-up tube passage necks down at the brass fitting, then it necks down again at the actual orifice. I tried to show what I think is happening in the above drawing. The copper wire will want to hang up at the first neck-down. Once you finally find the actual orifice, it helps if you bend the copper wire into a sort of brace and bit so that you can employ a drilling motion as you try to poke at and clear out the orifice. This is all done while the pick-up hole is filled with MEK.
I have done this many, many, many times. I can usually clear a choke orifice in 5-20 minutes, depending on how badly plugged it is.
I haven't had to clear one since buying my ultrasonic cleaner, but I'm going to try it next time. I will fill a jar that is large enough to hold the float bowl with MEK, and then put the jar and bowl in the ultrasonic cleaner water bath.
So, do I need a .5mm drill for the hole?
 
So, do I need a .5mm drill for the hole?
Well, that's what GLJ did (#60 drill bit), and it seems to have worker for him, but I still suggest poking with a thin single strand of thin copper wire as shown in my picture, post #38, with some solvent in the hole, and some patience. Also read Gary's post #39.
 
POST UP PICS!
You reminded me I have been remiss with this thread I didn't post pics when I got done. I'll fix that.
Also I didn't post a lot of what got done after I got the carbs working. I'll be posting some of the things I had to do.
As I got it. Doesn't look real bad. It's not as nice as these 2 pics make it look.
1735403865233.jpeg
1735403905225.jpeg

1735410071913.jpeg


As it is now. More or less finished. I may do some polishing on the engine side covers.
I'll also be posting pics taken during the rehab processes.
1735410412289.jpeg
1735410465066.jpeg

1735410572475.jpeg
1735410621811.jpeg
1735410674809.jpeg
1735410718805.jpeg
1735410765413.jpeg
1735410794460.jpeg
 
Last edited:
So, do I need a .5mm drill for the hole?
I did work for me, it does make the chock richer. I'm still experimenting with how much chock to give it when cold. It starts on full chock but you have to go to 1/2 chock pretty quickly.
I would only do it again as a last resort with the #60 drill bit. If I could find a bit that would reach that was the same size or just slightly bigger it would be a better fix.
 
As I mentioned earlier (page 2, post #40), I've never needed to poke the choke jet to clear it. Those long needle tips for your blowgun work every time.

View attachment 341605

View attachment 341606
I need to get some of those needle tips. I had an XJ650 carb that has a TINI TINY jet in the bowl that one of the 4 was clogged. Finally got it out with an acupuncture needle.
 
Yes, anyone who cleans carbs should have a set, along with that tapered rubber tip. But there's places the rubber tip won't get into, or can't be made to seal, and that's where these needle tips come into play. Find the size that will fit down into that step where the choke jet is and you get a terrific blast of air directly into the jet. Like I said, I've never needed to poke one clear, this very high pressure air blast has always done the trick.
 
Yes, anyone who cleans carbs should have a set, along with that tapered rubber tip. But there's places the rubber tip won't get into, or can't be made to seal, and that's where these needle tips come into play. Find the size that will fit down into that step where the choke jet is and you get a terrific blast of air directly into the jet. Like I said, I've never needed to poke one clear, this very high pressure air blast has always done the trick.
Where do you buy an air gun with such tips? I think I need to get one.
 
Like I said, I've never needed to poke one clear, this very high pressure air blast has always done the trick.
Your day will come. ;) Do enough carbs from ratty old barn bikes and it'll happen. :cussing:I think the immovable plug I found was from a set where the guy Permatexed the gaskets or petcocks. After that crap dissolves, then hardens in the bottom of the float bowls with some tank rust, debris, it's near epoxy.
PS I have the blow gun needles, came in some generic airgun set. The threads on the airguns do vary.
 

Attachments

  • varnish.jpg
    varnish.jpg
    131.7 KB · Views: 28
Last edited:
Back
Top