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Well this is an interesting approach to broken float tower

  • Thread starter Thread starter jdvorchak
  • Start date Start date
J

jdvorchak

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I just love these old bikes. You never know what you're going to find that a PO did. This is an interesting approach to fixing broken float pivot towers on BS32. Look at the carb on the right:

 
Using two bolts to replace the broken towers is really kind of a good idea. If I can get the hinge pin out I'm just going to clean up the sides a little, where the float pivots, and set the float height. As long as the float swings freely and I can set the height I don't see a real problem. The float is just hanging up on the rough surface of the threads. About 1 minute with a die grinder and I'll have them smooth. Personally I've had good luck using JB Weld (not quick) to glue those back in place. Who ever did the work before didn't get the rack assembled correctly and the throttles were hanging up on something. As soon as I started to disassemble them they snapped closed. In any event they are not really all that dirty inside. I'm sure some of the small passages are plugged but overall they are pretty clean.
 
I had a tower break off right in the middle. So I drilled a hole in the post base and a hole in the broken surface of the broken off tower part.
Then I inserted a roll pin and tapped the post back on.
Came out pretty straight for hand drilling it. If one was to use a drill press I imagine the results could be excellent using a good drill press bed vise.
I think you are right, file those threads smooth and call it a day. Should be fine.
 
I got the pin out pretty easily. Turns out it is a finish nail. Even if I need to put a small washer in to take up excessive end play I think it will be fine.
 
I have a JB Welded one going on 3 years now, no problem. Might be a problem next time I take the carbs apart but I have a spare set.
 
Further finding. One of the "towers" is loose. So I'll be putting some JB weld on both just to make sure. Also noticed that when he drilled the hole for the tower on the left, he went all the way through to the air intake!... I'll be using JB weld on that hole once I get it cleaned out. He put RTV over the hole.... Gotta love these old bikes....SMH... LOL

So while I disassemble the carb rack I'll order some O-Rings from Mr. robertbarr's carb O-rings
I've used them before and was really pleased.
 
If you end up wanting to fix it correctly then just give me a PM. I have a number of BS32 carb bodies laying around that are cleaned and ready to use. I can part with one relatively cheep.
 
I can vouch for JTGS850GL, I got a carb body from him a couple years ago after I broke my second post (slow learner).
 
Necessity truly is the mother of invention. When that repair was done, perhaps new carb bodies cost an arm and leg and there was no ready supply of cheap used ones like now.
 
They sure are available now. Personally I can see using a carb body in that shape today.
 
I've had a JB welded one fail... Just so you know it's possible! I've done a "pin up the middle" with a split pin across fix on one of these before too. That's still going (in my friends bike) 7 years later...
 
Good to know I can get a replacement if I decide this isn't going to work. I'll probably work on it today a little. Need to get my small grinder working on the threads to smooth them out. Then see if I can adjust the float setting. I still need to pull the rack apart and Chem Dip them so it will be a couple of days before I'm ready to reassemble and test.
 
For what it's worth, it also looks like the screw posts are not even at the float pivot. Like the float is leaning to the left on the picture. The float pivot really needs to be level.
 
Thanks for that. I noticed the same thing and chalked it up the the right side, in the photo, is hanging up on the threads which is why I'll use my angle grinder on the threads to smooth them out. Right side, once again in the photo, has been smoothed but not down enough. Last night I put JB Weld on the base of the bolts and in the threads on that left post under the pivot pin to smooth them out. JB Weld machines like metal when cured. We'll see how it is when I'm done.
 
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Boy do I feel like a dummy. Got the carbs all finished and put back on the bike. Hung my IV fuel tank and fired it up. Runs pretty good only had to twist the idle adjust about a turn in to get it to idle. Then I grabbed a bunch of throttle, after it was warm, and big time bog. I said to myself "Oh when I get the air box on that will go away". Then I realized that the air box was sitting on the bench next to me and not on the bike. So now I get to pull the carbs back off to install the air box!! Well the bike is running on all 4 and idle is smooth and the enrichener worked perfectly. I probably need the practice R&R the carbs anyway....LOL
 
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