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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 02-21-2010, 04:19 PM   #1 (permalink)
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my petcock is leaking gas

it's leaking right out of the face of the dial

just thought I would share the info in case a bunch of other people are having this issue

you are not alone!!


coincidentally i just bought a spare petcock but it was supposed to be for another project. Now it looks like i might just have to replace this one
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Old 02-21-2010, 04:35 PM   #2 (permalink)
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Mine's not leaking from the face, but it won't fully turn off. Just as well the float needles are in good nick!

I've had it apart, and the plastic inner section seems to have had a groove worn in it which is allowing the fuel to seep past presumably there was a bit if grit or swarf in there (I've had it from new) as it was originally quite stiff. It's a sort of cone shape with an O ring on the outside, so it may be an easy fix on yours if you pull it apart. I don't need to tell you to empty the tank first though
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Old 02-21-2010, 06:09 PM   #3 (permalink)
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Pet Cock

Those little buggers are touchy in some cases. I make a habit of turning them to both main and reserve and working them a bit by repeating and loosening them each time i use the bike.
They can become clogged with fuel residue making them sticky and stiff to operate.
You might try taking yours off and taking it apart and cleaning it some. I've read posts where they will work on reserve and not main and vice versa.
Also be aware that some tanks will experience a flaking of the interior tank coating and will clog reserve screens. You can get a borelight or flashlight and inspect the inside of your tank through the filler cap. If you see small grey flecks drifting around the bottom, you may want to drain and remove the petcock for cleaning and flushing the tank out. Done mine twice that way, others have had warranty replacements of tanks with similar problems.
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Old 02-21-2010, 07:57 PM   #4 (permalink)
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Get over it, buy a Pingel, won't leak, looks great, and as smooth as a babies but

Think BIG!

Hoopla
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Old 02-21-2010, 09:00 PM   #5 (permalink)
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I agree with Hoopla.

I've been using a PINGEL for over four years. Wonderful piece of gear.

Although they are made for high volume flow they also look fantastic and work really well. Stick a Monza cap on the top and you've got a classic tank.
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Old 02-21-2010, 09:42 PM   #6 (permalink)
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I'm going to be swapping out the tank soon anyway so I'll probably buy the pingel and put it on the other one. I don't want to fix this POS petcock only to have it happen again.


thanks for the tips
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Old 02-21-2010, 09:56 PM   #7 (permalink)
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Quote:
Originally Posted by HOOPLA View Post
Get over it, buy a Pingel, won't leak, looks great, and as smooth as a babies but

Think BIG!

Hoopla
Agreed. The petcock on my 2003 T100 feels like it is super-glued if I leave it shut off for a few days, then try to turn it to the open position. On the other hand, my old Beemer has twin petcocks, one on each side of the fuel tank. The bike is nineteen years old, and both of them still work as well as they did when new.

I have to think Triumph took the cheap route on the petcocks they installed at the factory during the first few years (or did install, since the new FI machines don't require them). Perhaps they installed improved petcocks later in newer machines ..... I don't know.

Bob
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Old 02-21-2010, 10:00 PM   #8 (permalink)
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Quote:
Originally Posted by ohiorider View Post

I have to think Triumph took the cheap route on the petcocks they installed at the factory during the first few years (or did install, since the new FI machines don't require them). Perhaps they installed improved petcocks later in newer machines ..... I don't know.

Bob

in addition to this issue my petock also is hard to turn

my bike is a 2008

I don't think they did jack **** in terms of improving it
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Old 02-22-2010, 02:57 PM   #9 (permalink)
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Make sure that bolts holding the petcock on too the fuel tank, and the one screw on the side of the p/c are tight, or you could be leaking from them.
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Old 02-22-2010, 03:53 PM   #10 (permalink)
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Originally Posted by ohiorider View Post
, my old Beemer has twin petcocks, one on each side of the fuel tank. The bike is nineteen years old, and both of them still work as well as they did when new.

Perhaps they installed improved petcocks later in newer machines ..... I don't know.

Bob
my mates 1974 Beemer petcock became stiff after he started using E10 fuel. must have viagra in it.

and Triumph petcocks on later models are no better than the earlier ones, ie crap.

BTW what the #### is a Pingel
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