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petcock? fuel line? cold weather? (Read 780 times)
Rocco
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petcock? fuel line? cold weather?
11/14/09 at 20:43:17  
SO! i rode yesterday and everything was amazing!

i started her up 2day and she died b4 hitting the end of the block, turned up the idle, seemed to be ok. but it kept diein or wantin to die at a stop...so i turned the petcock to res for giggles and it didn't happen again.

i waited til i got home b4 i put it back to "on" sat in the driveway for a minute or so and it idled fine.

can i just leave it on res and watch my mileage VERY carefully? i'll probably replace the one line from the carb to the tank(on the right side, already replaced the one on the left side). is it the petcock? is it expensive or difficult to swap to the raptor? OR can i just leave it in res??? i'm sure this has been answered many times over, but i love hearing the new and improved advice!!
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Re: petcock? fuel line? cold weather?
Reply #1 - 11/14/09 at 21:34:22  
You're runnin' out a gas, ya' big dummy!... Grin

Seriously,... a typical petcock problem is cured by blocking off the vac line and running on Prime... or a vac line leak, by just running on prime...
Going to reserve,... could mean that your On postion fuel tap is clogged and needs cleaning, or...

You're runnin' out a gas, ya' big dummy!... Grin

Grin Grin Grin   I only say that, 'cause you're too far away to smack me... Wink

BTW,... a Raptor petcock is about $20 + $10 shipping... very sexy for a metal thing...
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Re: petcock? fuel line? cold weather?
Reply #2 - 11/15/09 at 03:46:24  
Rocco,

Drain it, then take your tank off and pull the petcock.  The screen on your petcock is likely blocked off with varnish -- some carb cleaner can work wonders to make your stock vac petcock behave a lot better.

Or, I second the Raptor replacement idea -- the only downside to them is having to remember to turn your gas off every time you stop.
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Rocco
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Re: petcock? fuel line? cold weather?
Reply #3 - 11/15/09 at 05:44:42  
lol serowbot, you're too cool for me to smack!!!


i thought it was low on gas too but i just filled up the night before!!

ok, i'll replace that line, i'm goin riding 2day with some friends hopefully i can get through this lol and then as soon as i can i'll pull the tank!

and i'm glad the petcock isn't expensive!!!
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Re: petcock? fuel line? cold weather?
Reply #4 - 11/15/09 at 06:48:00  
You'll have to drain the tank,... and when you pull the petcock (two bolts), you'll have to gently bend the pick-up tubes to get them out of the tank, if you do it with the tank on the bike... but it is possible..
Spray that screen clean, then blow through from the bottom to make sure it's clear... Wink
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Re: petcock? fuel line? cold weather?
Reply #5 - 11/15/09 at 08:03:06  
Pulling the rear hold down bolts & lifting the rear of the tank might make pulling the petcock a little easier,
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Re: petcock? fuel line? cold weather?
Reply #6 - 11/15/09 at 09:48:46  
While you are examining the petc0ck, be sure to check the four screws holding the diaphragm cover on.  A couple of mine loosened up and caused a vacuum leak.
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Re: petcock? fuel line? cold weather?
Reply #7 - 11/15/09 at 14:06:05  
awesome! thanks guys! i went riding 2day with my friends, 100 miles total but she ran perfect! like a scalded dog actually...not one problem with the petcock in the on position....maybe she was mad @ me!! i'll still clean the screen and replace the line though!!

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Re: petcock? fuel line? cold weather?
Reply #8 - 11/16/09 at 00:04:17  
oh wow! Another Harley. How unexpected. You're shooting from the wrong side my friend.
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Re: petcock? fuel line? cold weather?
Reply #9 - 11/16/09 at 06:44:43  
Sorry guys, but I think you're barking up a tree where the problem ain't !........or maybe its, ...."the wrong tree" ?

Its the same as blaming a fuel filter, for low or intermedieate speed problems.
As w/ any carbed engine,....anytime the engine runs fine at higher speed speed, don't blame any part of the "main fuel delivery system" for idle or low speed problems !
That fact will never change,.....sorry.
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Re: petcock? fuel line? cold weather?
Reply #10 - 11/16/09 at 07:32:37  
If the reserve tap fixes it,... the on tap has to be the problem....
Make sense?...
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Re: petcock? fuel line? cold weather?
Reply #11 - 11/16/09 at 07:40:31  
If it really fixes it, then you would have to be right. But did you put any logical common sense thinking into my statement before posting ?

I can only tell it like has been proven ever since carbed engines existed. I mean, if a carb is getting enough fuel to run WOT, how could it not be getting enough to go slow,.....or idle. But then, I'd bet you would have known that w/o me tellin it Wink
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Rich
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Rocco
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Re: petcock? fuel line? cold weather?
Reply #12 - 11/16/09 at 08:25:04  
i'm lost! and i took a bunch of pics, posted that one cuz i figured u guys remembered what my beast looked like!!lol

ok, so what are we saying here? what should i do to fix the problem??
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'95 bobber rat...i guess it's a "bat bike" haha flat black mostly, bare metal tank, header wrap, always a work in progress !
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Re: petcock? fuel line? cold weather?
Reply #13 - 11/16/09 at 08:30:44  
Yup,..
and
Yup,...

I do get your point,... but if going to reserve fixed it.... there's no other option...
otherwise,... I'd guess different..
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Re: petcock? fuel line? cold weather?
Reply #14 - 11/16/09 at 08:37:10  
Rocco,...  It still stands true, that if your bike runs fine on reserve, it has to be a plugged pick-up screen on the petcock...
But, if you are mistaken, and the problem can occur on reserve too...  it is more likely a carb problem like Routy says... clogged pilot jet, sticky slide, low idle....
Let us know, if you notice anything else...
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