Gas fittings on new tanks

[callison]

 

Hey guys, are these the type of fuel line fittings on the newer tanks? Just curious.

[grossohc]

No

Gary

[jrt]

Those are for water- I bought a bunch of them for my lab.

[waspp]

similar concept but no. ford automotive fittings are close as well. I had to fab a new system as mine were broken off at the tank.

 

waspp

[orangeokie]

 

Hey guys, are these the type of fuel line fittings on the newer tanks? Just curious.

81194[/snapback]

 

Carl, those look like the fuel fittings on my aprilia Falco. Had a tendency to come undone and leak.

[callison]

These are from Dennis Kirk. I thought maybe I'd run across another source of replacements but that looks to have been wishful thinking. I don't need any with my assortment of bikes, but others would. Sometimes, you just can't find the part commercially. The IC chip in the earlier tachs is such an item. There is no commercial source for the 14 pin type that I've ever been able to locate, likewise a pin-out for the little beast.

[orangeokie]

Here's a (clickable) pic of the

aprilia bits. Click it if you want to

see other photos and a discussion

of the shortcomings of this system.

 

[hgravelpha@aol.com]

I had similar fittings that came stock on my 1997 Triumph t595. Before selling the Triumph, I put 40,000+ miles on her and it did not leak once. I removed the tank at lease 10-12 times in that period of time. It made removing the tank simple and straight forward. These attchments are similar to ones that are used in labs but they have different types of orings for different chemical uses. I sell these at MCMaster-Carr. I'm pretty sure that you can get more info concerning application for different types of chemical for these fittings at mcmaster.com. Hope this was helpful.

[al_roethlisberger]

I had similar fittings that came stock on my 1997 Triumph t595.  Before selling the Triumph, I put 40,000+ miles on her and it did not leak once.  I removed the tank at lease 10-12 times in that period of time.  It made removing the tank simple and straight forward.  These attchments are similar to ones that are used in labs but they have different types of orings for different chemical uses.  I sell these at MCMaster-Carr.  I'm pretty sure that you can get more info concerning application for different types of chemical for these fittings at mcmaster.com.  Hope this was helpful.

81412[/snapback]

 

Triumph recalled a bunch of those fittings. They were breaking due to the stress of repeated tank removal.

 

I do not know which ones they replaced them with though.

[Guest ratchethack]

I've had to shorten up my gas lines several times from repeat dismounting of the tank chewing up the hose. Looks like I gotta do sumpin' smarter pretty soon.

 

I saved these BMW gas line quick-disconnect part numbers from way back when, intending to investigate, and never got a "round tuit".

 

1 331 7659 120

1 331 7659 119

 

Anyone have any experience with these?

 

TIA

[Kiwi Dave]

I've had to shorten up my gas lines several times from repeat dismounting of the tank chewing up the hose.  Looks like I gotta do sumpin' smarter pretty soon.

 

I saved these BMW gas line quick-disconnect part numbers from way back when, intending to investigate, and never got a "round tuit".

 

1 331 7659 120

1 331 7659 119

 

Anyone have any experience with these?

 

TIA

81937[/snapback]

 

Yeah, I put a set on my 2002 Le Mans about the same time this information was published, after the original clamp started seeping petrol. Absolutely no problems with them, what a pity the later pump in tank type connectors weren't as easy to disconnect.

[Guest ratchethack]

Yeah, I put a set on my 2002 Le Mans about the same time this information was published, after the original clamp started seeping petrol.  Absolutely no problems with them, what a pity the later pump in tank type connectors weren't as easy to disconnect.

Thanks, Dave. That does it - now I've finally got a "round tuit"!!

 

EDIT:

 

YIKES!

 

I just found stock on these at my friendly local Bayerische Motoren Werke und Schnitzelbank parts department. A set of these little jewels with those lieblich "Black Forest" FI clamps comes to ~$100 USD, with state tax!

[Marc B]

This is copied from the Vintage race list

Marc

 

I spent some time over the last couple of days looking at the fuel

line dry-break quick disconnect couplers I've got, and I thought I

would share my findings.

 

It appears these couplings (as commonly sold by various

aftermarket motorcycle places) are made by:

 

http://www.colder.com

 

http://www.colder.com/asp_main/GeneralPurp...asticProducts.a

sp

 

http://www.colder.com/asp_main/FeaturesBenefits/PLCFBInd.asp

 

These are CPC's PLC series, made of acetal. The PLC series is

good for -40->180F and 120 psi of vacuum. According to their

product info, acetal is "excellent" for unleaded gasoline and also

seems excellent for acetone, benzene, ethanol, and methanol, so

maybe we can use it on our fuel drag bikes.

 

I note that some of the packages on the couplers are marked

"viton" and others aren't. The standard o-ring is Buna-N so they

may have supplied those in the earlier days and then wised up to

the fact that the Buna-N didn't hold up that well. I know I've had

several O-rings swell up to the point where they tore when I pushed

the coupler back together.

 

They do have metal couplers (aluminum and chrome-plated brass -

might be a bling bling auto/motorcycle market for those) as well as

multiple line couplers and other whizzo things.

 

Replacement O-rings are offered for 80 cents each by the

motorcycle places which seemed a bit high so I pulled some of the

O-rings off and measured them.

 

It appears the 1/4" connector uses a #008 O-ring and the 5/16"

appears to use a #011 ring.

 

A bag of 100 #008 Viton O-rings (5/16" OD x 1/16" stock) from

MSC (09265083) is $8.36

A bag of 100 #011 Viton O-rings (7/16" OD x 1/16" stock) from

MSC (09265117) is $10.24.

 

MSC has four pages (4196 seems to be for this line) of CPC

products and you have to order either side seperately:

 

1/4 hose barb body $8.22, insert: shutoff $8.07, straight through

$1.73

5/16 hose barb body $8.22, insert: shutoff $8.07, straight through

$1.77

 

Chrome-plated brass are roughly $22, $14, and $6.36

 

There are right-angle inserts too, as well as couplers with NPT

threads

 

An aftermarket place sells the single sided 5/16 for $16.95 and the

double 5/16 for $21.50

 

$5-6 savings per coupler would add up pretty quick, and certainly

pays for the bag of spare o-rings (since they'd come with Buna-N it

might be best to just swap them out right at the start).

 

I feel like this was actually a productive way to spend an hour or so

this morning.

 

cheers,

Michael