Friendly Caution - Fuel Pipe - Ducati Supersport 939 Forum
 15Likes
Reply
 
LinkBack Thread Tools
post #1 of 15 (permalink) Old 06-11-2019, 02:07 PM Thread Starter
Senior Member
 
amoslws's Avatar
 
Join Date: Apr 2017
Location: Somewhere South
Posts: 3,679
Likes Received: 2779
Friendly Caution - Fuel Pipe

Today is the first time I have broken something, as in my own doing, on the SS.
I was cleaning the injectors today. It requires pulling the plastics off and the tank, then squeeze your hands in through the top of the airbox to remove the injectors.
Well removing them was the easy part. After some Macgyver type cleaning I reinserted the injectors.

Here it is winter and winter rarely goes below 15C so one can't really compare it to a Northern Hemisphere winter.
Anyone that has removed the tank will understand that the fuel pipe connects to the tank with a squeeze type click contraption. With it being cold that plastic squeeze connector was brittle and broke in two places on the squeeze ring.

So here's a tip, when removing the tank warm up the engine and use the heat of the engine to soften the plastic connector ring. When putting the connector back on, warm it up with a heat gun or someone's hairdryer. If it's cold then it's brittle and breaks quite easily. If it breaks then the 3 bar pressure of the fuel pump will blow it off from the tank and spray fuel all over.
Ed K, Rhino, Derek and 5 others like this.

Last edited by amoslws; 06-11-2019 at 02:12 PM.
amoslws is online now  
post #2 of 15 (permalink) Old 06-11-2019, 02:23 PM
Senior Member
 
Dino de Laurentiis's Avatar
 
Join Date: Nov 2018
Location: Sweden
Posts: 313
Likes Received: 259
Thanks, good to know. Sucks that it happened to you.

2017 Ducati SuperSport S
2003 CCM R30 (project build)
Dino de Laurentiis is online now  
post #3 of 15 (permalink) Old 06-11-2019, 02:32 PM Thread Starter
Senior Member
 
amoslws's Avatar
 
Join Date: Apr 2017
Location: Somewhere South
Posts: 3,679
Likes Received: 2779
Quote:
Originally Posted by Dino de Laurentiis View Post
Thanks, good to know. Sucks that it happened to you.
I've done so much work on the SS, as in a full strip down and rebuild, and never stripped a bolt or damaged anything.. A simple connector breaks because of the cold. It's a biggish job to replace that pipe because the airbox must be removed and opened in halves.
I've applied some epoxy which is being allowed to set overnight, hopefully with some heat on it tomorrow it will seal on the tank.
Ed K likes this.
amoslws is online now  
Sponsored Links
Advertisement
 
post #4 of 15 (permalink) Old 06-11-2019, 04:06 PM
Senior Member
 
Rhino's Avatar
 
Join Date: May 2017
Location: Queensland Australia
Posts: 1,918
Likes Received: 2019
how clean were the injectors did they need cleaning ?
Rhino is online now  
post #5 of 15 (permalink) Old 06-11-2019, 05:03 PM Thread Starter
Senior Member
 
amoslws's Avatar
 
Join Date: Apr 2017
Location: Somewhere South
Posts: 3,679
Likes Received: 2779
Quote:
Originally Posted by Rhino View Post
how clean were the injectors did they need cleaning ?
They are 1200 injectors, 2nd hand. Spray pattern seemed good with enough atomisation. Still trying to get the hot start perfected, it starts hot but not yet 100% right. I was checking the pulse and impedence etc, and then a clean using a tyre valve to seal the ports. Works a charm.
I use Caltex with Techron. Allegedly according to their promotions, techron continually cleans the fuel system so overall it was good. Not sure which brand adds techron in Aus but in USA it is Chevron.
Rhino likes this.
amoslws is online now  
post #6 of 15 (permalink) Old 06-11-2019, 06:14 PM
Dox
Senior Member
 
Dox's Avatar
 
Join Date: Jan 2019
Posts: 177
Likes Received: 276
Sorry about your issue...but you mentioned it being winter, and cold, and then threw in 15c...I'm confused? Do you mean the heat has made it brittle?

I hope your fix works ok - given your skills I'm sure it will.
Dox is offline  
post #7 of 15 (permalink) Old 06-11-2019, 11:21 PM
Senior Member
 
klev's Avatar
 
Join Date: Nov 2016
Location: CA
Posts: 1,338
Likes Received: 513
Garage
Is the plastic connector replaceable with metal one or is it part of the tank?

Keeping It Simple
klev is online now  
post #8 of 15 (permalink) Old 06-12-2019, 01:41 AM Thread Starter
Senior Member
 
amoslws's Avatar
 
Join Date: Apr 2017
Location: Somewhere South
Posts: 3,679
Likes Received: 2779
Quote:
Originally Posted by klev View Post
Is the plastic connector replaceable with metal one or is it part of the tank?
No, the pipe is also heat shrank onto the connector and cannot come out. First pic is my broken one and 2nd pic is my spare one but to replace it means stripping the airbox and honestly that's a [email protected] job opening the box and getting the inlet ports mounted onto the heads again.
Attached Thumbnails
Click image for larger version

Name:	15603178661882342366518252387079.jpg
Views:	23
Size:	80.9 KB
ID:	37672   Click image for larger version

Name:	1560317887956327921850147928741.jpg
Views:	24
Size:	67.6 KB
ID:	37674  
amoslws is online now  
post #9 of 15 (permalink) Old 06-12-2019, 01:47 AM Thread Starter
Senior Member
 
amoslws's Avatar
 
Join Date: Apr 2017
Location: Somewhere South
Posts: 3,679
Likes Received: 2779
I suppose 15C is not cold to you. The cold makes it brittle and easy to break. If that's your spring temperature then you should warm up the ring before squeezing the ring.

Quote:
Originally Posted by Dox View Post
Sorry about your issue...but you mentioned it being winter, and cold, and then threw in 15c...I'm confused? Do you mean the heat has made it brittle?

I hope your fix works ok - given your skills I'm sure it will.
Dox likes this.
amoslws is online now  
post #10 of 15 (permalink) Old 06-12-2019, 04:02 AM
Senior Member
 
Derek's Avatar
 
Join Date: Jun 2017
Location: Angus, Scotland
Posts: 1,251
Likes Received: 1326
Hll! 15 Deg is only a little less than summer temperatures here. These plastic clips are used on quite a few models and I've always thought them a bit fragile although I haven't had any break yet. I guess it's only a matter of time.

2017 Supersport 939
2015 Scrambler Classic
1994 907ie
1982 Pantah 500SL (now sold)
Derek is offline  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome