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Old 03-14-2011, 06:44 PM   #1
Grider Pirate OP
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Bing issue

My '95 GSPD has always missed slightly under very low load conditions. I've been fighting it for years. New Metering Needles, New Needle jets, new Diaphragms, etc. etc.. By contrast, my '88 RS has always run wonderfully. Last week I swapped carbs between the two bikes, and, as expected, now the GSPD runs sweetly and the RS.. not so much. The book calls for all the same parts (jets, needles, etc..) but I tore down both sets to compare. Needles in the same grooves, same jets (135, 2.66, 45)... everything I could find was identical. WTF?? Then I noticed on one of the GSPD carbs that the little domed piece in the center of the carb top is LOOSE.

It's loose enough to pass some significant air in a highly scientific 'suck' test. I've never heard of this before. Is it common?
I'm thinking of floating some epoxy into that junction. Anybody have experience with this?
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Old 03-14-2011, 06:52 PM   #2
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Fairly common problem.
Rather than try to recrimp it when that happens, I use JB weld.
Works like a dream
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Old 03-14-2011, 06:52 PM   #3
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Quote:
Originally Posted by Grider Pirate View Post
It's loose enough to pass some significant air in a highly scientific 'suck' test. I've never heard of this before. Is it common?
I'm thinking of floating some epoxy into that junction. Anybody have experience with this?
Mine were loose and I used some gasket maker, epoxy sounds like a better way to go. The loose tops definitely had a negative effect on how my bike ran
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Old 03-14-2011, 06:55 PM   #4
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I'd use Loctite 290, formerly known as Wick'n'Lock. Just put a drop or two around the plug and watch it disappear. Don't get carried away with the quantity, and apply with the engine stopped.
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Old 03-14-2011, 06:58 PM   #5
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Has anyone ever sent them to Bing USA to get re-crimped?
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Old 03-14-2011, 07:11 PM   #6
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Has anyone ever sent them to Bing USA to get re-crimped?



Nope.



Quote:
Originally Posted by bmwrench View Post
I'd use Loctite 290, formerly known as Wick'n'Lock. Just put a drop or two around the plug and watch it disappear. Don't get carried away with the quantity, and apply with the engine stopped.


Short, sweet, and effective.
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Old 03-14-2011, 07:14 PM   #7
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I like using epoxy. The top piece will always look shiny. BTW. Check your choke gaskets.
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Old 03-14-2011, 07:20 PM   #8
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If you're running 32mm Bings, an old rally pin with some silicone under it works perfectly.

I haven't found the perfect object to glue onto 40s yet.





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Hawk Medicine screwed with this post 03-14-2011 at 07:26 PM
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Old 03-14-2011, 08:18 PM   #9
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Originally Posted by bmweuro View Post
I like using epoxy. The top piece will always look shiny. BTW. Check your choke gaskets.
All new. BTW, I followed yer link. You're selling real PARTS again?? Whoohoo!
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Old 03-14-2011, 08:20 PM   #10
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Originally Posted by mymindsok View Post
If you're running 32mm Bings, an old rally pin with some silicone under it works perfectly.

I haven't found the perfect object to glue onto 40s yet.




I like that, but I don't have any such devices.
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Old 03-14-2011, 08:59 PM   #11
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Originally Posted by Grider Pirate View Post
All new. BTW, I followed yer link. You're selling real PARTS again?? Whoohoo!
The only other thing I can think of is throttle shaft o-rings. Yep back in the biz. I missed you guys to much!
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Old 03-14-2011, 09:24 PM   #12
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Originally Posted by bmweuro View Post
The only other thing I can think of is throttle shaft o-rings. Yep back in the biz. I missed you guys to much!
Also new.
Epoxy is setting now. Didn't have any JB weld, so I used the epoxy that I use for glider repairs.
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Old 03-14-2011, 09:33 PM   #13
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Originally Posted by Grider Pirate View Post
Also new.
Epoxy is setting now. Didn't have any JB weld, so I used the epoxy that I use for glider repairs.
The epoxy will yellow over time but it is easier to remove and re-due than JB weld.
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Old 03-15-2011, 07:27 AM   #14
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BING bling.

A Euro.
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Old 03-15-2011, 11:09 AM   #15
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I've epoxied them from the inside, but that's a bit tricky avoiding any buildup on the slide walls - definitely a no-no. I like wrench's idea.
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