Bing issue

Grider Pirate · 03-14-2011, 06:44 PM

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?

wirewrkr · 03-14-2011, 06:52 PM

Fairly common problem.
Rather than try to recrimp it when that happens, I use JB weld.
Works like a dream

SOLO LOBO · 03-14-2011, 06:52 PM

Quote:

Originally Posted by Grider Pirate

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

bmwrench · 03-14-2011, 06:55 PM

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.

supershaft · 03-14-2011, 06:58 PM

Has anyone ever sent them to Bing USA to get re-crimped?

Tosh Togo · 03-14-2011, 07:11 PM

Quote:

Originally Posted by supershaft

Has anyone ever sent them to Bing USA to get re-crimped?

Nope.

Quote:

Originally Posted by bmwrench

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.

bmweuro · 03-14-2011, 07:14 PM

I like using epoxy. The top piece will always look shiny. BTW. Check your choke gaskets.

Hawk Medicine · 03-14-2011, 07:20 PM

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.

Grider Pirate · 03-14-2011, 08:18 PM

Quote:

Originally Posted by bmweuro

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!

Grider Pirate · 03-14-2011, 08:20 PM

Quote:

Originally Posted by mymindsok

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.

bmweuro · 03-14-2011, 08:59 PM

Quote:

Originally Posted by Grider Pirate

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!

Grider Pirate · 03-14-2011, 09:24 PM

Quote:

Originally Posted by bmweuro

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.

bmweuro · 03-14-2011, 09:33 PM

Quote:

Originally Posted by Grider Pirate

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.

boxerboy81 · 03-15-2011, 07:27 AM

A Euro.

Wirespokes · 03-15-2011, 11:09 AM

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.

03-14-2011, 06:44 PM	#1
Grider Pirate ^OP Beastly Adventurer Joined: Sep 2007 Location: LV, NV Oddometer: 1,669	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? __________________ Please don't tell Mom I'm a pilot. She thinks I play piano in a whorehouse. http://griderpirate.smugmug.com/ http://www.youtube.com/my_videos?feature=mhum

03-14-2011, 06:52 PM	#2
wirewrkr the thread-killer Joined: May 2008 Location: HIGH desert Oddometer: 4,297	Fairly common problem. Rather than try to recrimp it when that happens, I use JB weld. Works like a dream __________________ www.wirewerkes.com KILL YOUR TELEVISION !!!!

03-14-2011, 07:14 PM	#7
bmweuro Mad Scientist Joined: Nov 2003 Location: Chico, California Oddometer: 2,966	I like using epoxy. The top piece will always look shiny. BTW. Check your choke gaskets. __________________ BOXER Metal BMW Biker Scum BMW Mad Scientist! VBMWMO #7770, BMW MOA #48694 & Airhead BMW Club #600

03-14-2011, 07:20 PM	#8
Hawk Medicine Coyote's Brother Joined: Jun 2008 Location: NOR CAL Oddometer: 3,299	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. __________________ Hawkdude Hate rots the pocket that carries it. Hawk Medicine screwed with this post 03-14-2011 at 07:26 PM

03-15-2011, 07:27 AM	#14
boxerboy81 Stay Horizontal Joined: Jul 2009 Location: Oz, Australia Oddometer: 1,602	BING bling. A Euro. __________________ R100RS Gallery, over 800 pictures...

03-14-2011, 06:55 PM	#4
bmwrench Beastly Adventurer Joined: Nov 2006 Oddometer: 1,465	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.

03-14-2011, 06:58 PM	#5
supershaft because I can Joined: Sep 2010 Location: San Francisco Bay area Oddometer: 6,080	Has anyone ever sent them to Bing USA to get re-crimped?

03-15-2011, 11:09 AM	#15
Wirespokes Beemerholics Anonymous Joined: Jul 2002 Location: Jackson's Bottom Oregon Oddometer: 7,356	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. __________________ Wanted: Dead, smashed, crashed or trashed gauges BMW GAUGE REPAIRS - TACHSPEEDOCLOCKVOLT METER PODs & LIGHT BOARD*

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