 losing power
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Joined: Apr 2005
Posts: 6
Complete Newb
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OP
Complete Newb
Joined: Apr 2005
Posts: 6 |
Just after topping off tank for a long one, it started to lose power. I have heard before of gas caps not venting so I unscrewed it enough to allow it to vent. Regained power immediatley. Repeated the same problem after I screwed it back on tight, same thing. Started to bog down. Anyone have this happen to them before? I guess I'll have to hit the dealer for a new one. Jack
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Re: losing power
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Joined: Jan 2005
Posts: 1,216
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,216 |
It's not the cap, it's the vent line. Well, as I type this I wonder a couple of things, how long have you had the bike, and has this happened before? It doesn't usually 'happen out of the blue' but rather on a brand spankin new machine or if you've had the tank off for some reason. There's also a vent valve in the vent line. The vent line is under the right side of the tank against the frame backbone and if you raise and lower the tank it too easily becomes pinched. The vent valve is in that line behind the carbs and if it fails will create the same symptom as a pinched line. Of course, if you've put thousands of miles on the machine, never had the tank off, and it just now happens but clears with the cap unscrewed/vented, I think I'd look at the vent valve.
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Re: losing power
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Joined: Apr 2005
Posts: 6
Complete Newb
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OP
Complete Newb
Joined: Apr 2005
Posts: 6 |
sounds like I'll have to take it into the dealer. Just turned 1000 miles and this was the first time it happened. Thanks
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Re: losing power
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Joined: Jan 2005
Posts: 12,877
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 12,877 |
Might want to check that T filter too, but taking the tank off to check for a pinched line is a sinch...
Benny
Black & Silver '02
Too many mods to list
Not enough miles ridden
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Re: losing power
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Joined: Feb 2005
Posts: 601
Adjunct
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Adjunct
Joined: Feb 2005
Posts: 601 |
MIKE
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Re: losing power
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Joined: Jan 2005
Posts: 8,639 Likes: 3
Old Hand
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Old Hand
Joined: Jan 2005
Posts: 8,639 Likes: 3 |
According to the manual, the cap is supposed to have a 1 way vent built into it. That could be stuck closed or blocked. The 'vent' (really overflow according to Triumph) hose has a rolover valve stick in the end on bikes that don't have the CA emissions system. If the later models (the manual was printed before the Speedmaster went into production) really do vent through the hose, the rolover valve could be clogged or the hose pinched. When you take the tank off, the hose has a habit of laying on the right tank mounting rubber and getting squashed when you put the tank back on.
Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python
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Re: losing power
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Joined: Jan 2005
Posts: 6,308 Likes: 4
Worn Saddle
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Worn Saddle
Joined: Jan 2005
Posts: 6,308 Likes: 4 |
Clue #1: Quote:
Just after topping off tank for a long one, it started to lose power.
Solution most likely to be the culprit!!
Quote:
Bad fuel (water)??
Been there, done that, more ti9mes than I will admit in a public forum.
GAS SUX these days!
If it runs great, you gas up, it runs like Bin Laden (PC for $h1T), DOH! Bad GAS!!!!!
Cheap easy fix, put in your lawnmower and go for a ride on the bike.
A word to the wise is not necessary. It is the stupid ones who need the advice.
Pat
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Re: losing power
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Joined: Apr 2005
Posts: 6
Complete Newb
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OP
Complete Newb
Joined: Apr 2005
Posts: 6 |
Couldn't be the fuel since it ran fine with the cap cracked. We'll see what they say when I drop it off tomorrow
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Re: losing power
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Joined: Apr 2005
Posts: 6
Complete Newb
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OP
Complete Newb
Joined: Apr 2005
Posts: 6 |
Looks like it was the vent hose. They said some gunk was in it from the factory and could have been hampering the function of the valve. Thanks for advise....
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