Using two petcocks?

GKon
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GKon
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Joined: April 26th, 2018, 7:21 pm

May 20th, 2018, 11:37 pm #11

lowridertommy wrote: That was a customers bike we built last year, so I can't get any more than I have.. and I didn't get one that shows the HL mount.. it was a stock SBF brkt that came with the girder when it was new.. I found a pic that shows some of it.. It curves under the lower pivot and then goes up to the neck and screws into the bottom of the stem..SB&F SQUARE GIRDER CLOSEUP.jpg
The front brake is a small Tokico caliper that is used on a lot of Kaws and a few Hondas too I believe..
The rotor is stock CB750 that we drilled..
I had a bracket machined from stainless to mount it..14.JPG
Very, very cool stuff!  Thanks for taking the time to post the photos.  
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cb750 bobber
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cb750 bobber
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Joined: October 19th, 2007, 1:50 am

May 22nd, 2018, 10:31 pm #12

lowridertommy wrote:
GKon wrote:
maginoo pero bastos wrote: konstantine you might have had a fuel flow issue, and not necessarily a petcock issue.  what type fuel filters do you run?  i prefer dual petcocks, and inline filters between each petcock and carb inlet.
Hey there, Angelo!  I do know it was a fuel flow issue, but due to two different reasons. 

It's funny you ask because about the fuel filters because when using the fuel filters I had, that's the first time thatI had a fuel flow issue.  As soon as I removed them, things got better.  
I don't know the brand name of the filters.  They were clear plastic, with a brass colored insert in them that did the filtering, and the filters were shaped like cones.

Because of that, many times, I won't even use filters. 

The other fuel flow issue I had was that the petcocks on the tank I was using were located more towards the centerline of the tank.  When sitting on the backbone of the Amen frame, there was a decent amount of fuel that could not be used sitting at the bottom of the tank, due to the angle.  If the fuel got low, and if I was leaning deeply into a turn, I'd get fuel starvation out of that side because of the fuel level. 

The tank I'm interested in buying now has the petcock holes at the very back of the tank, to eliminate this issue. 
This will show you one example, at least.
I'd rather run the lines on the front of the filter to keep them tucked in and clean looking, however, on this project that would've possibly kinked the lines a bit. I could have turned the petcocks sideways some and made a larger loop in the feed line..... but then.. there goes that clean, tucked in look.... out the window..lol
05.JPG
Wow, Tommy, that bike has gotten a rockin’ great stance for a softail.


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Joined: May 14th, 2002, 10:24 pm

May 22nd, 2018, 11:23 pm #13

Thanks Greg..
I'm happy with the way it came out..
We spent a little time with the shock mounts on the swing arm to try to get the shock angle to give it a good ride and still sit low...
I cut a skirted fender down some to fill that gap over the tire.. 
More side skirt to the fender than a standard flat fender..
That setup rides good and somewhat comfy..
It needs a thicker seat though..
Build it the way you want it ..... then learn how to ride it like you own it..
www.lowridersbysummers.com
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itheo58
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itheo58
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Joined: June 17th, 2014, 3:32 am

May 23rd, 2018, 11:44 am #14

lowridertommy wrote: Thanks Greg..
I'm happy with the way it came out..
We spent a little time with the shock mounts on the swing arm to try to get the shock angle to give it a good ride and still sit low...
I cut a skirted fender down some to fill that gap over the tire.. 
More side skirt to the fender than a standard flat fender..
That setup rides good and somewhat comfy..
It needs a thicker seat though..
Hope this info helps.
I fitted 2 petcocks that are sold for Royal Enfields sold here in Oz I guess to meet dezign regulations.
They have BSP thread for the tank with an adaptor so that a metric tap with on off reserve is able to be fitted.
Now I have a tap each side with reserve feature although yet to see how much is left on each side.
My bike originally had brass taps for eash side but on first ride leaked.
It also helps to smear thread sealant around threads as new taps do not have tapered threads.
Not sure if tanks that are made in US have a BSP thread but mine has 1/4 bsp which is British origin so tank may locally made.
With the adaptor the tap can be replaced as most likely common to any Japanexe bike pre fuel injection.
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RetroRice
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RetroRice
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Joined: August 27th, 2011, 12:31 pm

June 11th, 2018, 1:58 am #15

My diamond coffin tank has two petcocks. It almost has to because the petcocks are located at the rear of the tank which has a rather tall tunnel. I think a single petcock would only be able to access one side of the tank when the fuel becomes low. 
As an aside I discovered the "reserve" gas position provides enough gas to get the bike about 200 yards or so because of the angle that the tank is mounted. 
Ah ... to be young and stupid again instead of old and still stupid ...
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cb750 bobber
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cb750 bobber
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Joined: October 19th, 2007, 1:50 am

June 11th, 2018, 2:27 am #16

“As an aside I discovered the "reserve" gas position provides enough gas to get the bike about 200 yards or so because of the angle that the tank is mounted.”

200 yards! That’s a gas!

greg


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Joined: October 5th, 2007, 6:52 pm

June 11th, 2018, 2:30 am #17

He even discovered it twice in one day!
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