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Trophy Trophy 3 & 4 - for all 900 and 1200cc models 1991- 2004

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Old 11-06-2012, 01:23 PM   #1 (permalink)
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Fuel/Vac lines - spec

First thing that I'll do when I pick up the 900 is replace the fuel/vac lines. Assuming that all the pipes are the same diameter I was just going to order a couple of metres (or six feet) of 6mm (1/4") fuel line. Sound ok to you folks? Wrong size or too much for what I'll need ? Thanks again
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Old 11-07-2012, 12:38 PM   #2 (permalink)
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It is a very tight fit under the gas tank and you have to be careful after installation to not kink any of the lines when replacing the gas tank. I originally bought the standard automotive gas line and then found the outside diameter was too large for this application. Then inquiring at a local Triumph dealership (which I should have done in the first place) I found that they sell the proper gas/vacuum lines in whatever length you need. Yes, the gas and vacuum lines are the same diameter. Sorry I don't remember what total length I needed but I'm sure someone else here can tell you if you don't want to take yours out and measure total needed beforehand. Good luck.
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Old 11-07-2012, 01:13 PM   #3 (permalink)
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Thanks Doug

As it happens, I'll be at my local Triumph dealership tomorrow and will see what they suggest - don't know why I never thought of that in the first place
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Old 11-07-2012, 03:03 PM   #4 (permalink)
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Disagree with the size thing completely. On my '97 900 - on which I am currently doing the fuel & vacuum system refurb - the fuel lines are 5/16" and most (but not all) of the vacuum lines are 3/16" (inside diameters). Some of the vacuum lines are 1/4".

The material is available almost anywhere. Take it apart before you buy anything.

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Old 11-08-2012, 01:52 AM   #5 (permalink)
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The OEM lines are semi-rigid, and there's a reason for that. Best to get the Triumph fuel lines, anyway, and I say that as a cheapskate!

If you do go for third party stuff, be sure it's high-quality thick wall tubing!

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Old 11-09-2012, 12:03 PM   #6 (permalink)
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The routing of the vacume line to the petcock is a good thing to take your time with,especially as the tank goes back on,if its even slightly kinked or even bent sorta tight,it can,as mine did,crimp shut when it gets hot under the tank.
Mine would run fine and depending on the heat it would squoosh that vacume line shut and randomly stop the bike from running.

Took a little while to figure this out as it looked fine when I would pull the tank and look at the lines. Once sorted its been fine.

Fuel lines need to be fuel line material,vacume lines need to be vacume line material,different animals for different jobs. Vent lines are just vent lines,pretty generic.
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Old 11-09-2012, 03:01 PM   #7 (permalink)
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Quote:
Originally Posted by Flattrack loon View Post
The routing of the vacume line to the petcock is a good thing to take your time with,especially as the tank goes back on,if its even slightly kinked or even bent sorta tight,it can,as mine did,crimp shut when it gets hot under the tank.
Mine would run fine and depending on the heat it would squoosh that vacume line shut and randomly stop the bike from running.

Took a little while to figure this out as it looked fine when I would pull the tank and look at the lines. Once sorted its been fine.
I had the exact same problem one afternoon while toodling through Idaho miles from anywhere. Very disconcerting and unnerving at the time.
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Old 11-13-2012, 10:27 PM   #8 (permalink)
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I used 5/16" ID auto fuel line and 3/16" auto vac line and a pair of fuel quick disconnects with no prob. Routed the rear line behind the frame spline, front line under the frame spline. Both lines meet the quick disconnects on the right side. I think I have pics in my user folder. Length really isn't an issue as long as there are no kinks.
Happy trails,
Erv
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