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2005 Single Carb VLX vacuum elimination?
Old 04-19-2017, 09:50 AM   #1
OVER10
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2005 Single Carb VLX vacuum elimination?

Hey guys! I am rebuilding my 2005 VT600CD (D means Deluxe, which I think means California model? Either way, I bought mine in California so I think it is a 'California model') and I'm finally to the point where I am putting it all back together after getting the wiring job done. I have eliminated a lot of the EPA crap (hoses, valves, and canisters) per TJBC's recommendations.

My issue is this, these single carb VLXs do NOT have a fuel pump, they have what is called an "auto fuel petcock." TJBC, and some of you, recommend going to gravity feed system on the single carb models, but I have spoken with other people that say my effective range will be decreased significantly because my tank will not be able to get all of the fuel to the carb when the fuel level is low.

So would keeping the auto fuel petcock (pictured below)

solve this problem? From what I gather, this part is Honda's solution to the single carbs not having a fuel pump.

So if I do keep this part, do I need the vacuum lines for this to function properly? You can see that this part has a vacuum hose fitting from the picture. Will keeping the vacuum system in tact help with fuel flow?

I would love to just run a line from my tank to my carb with an inline filter for simplicity's sake, but I also don't want to be gassing up every 80 miles... Hopefully some of you guys have some experience with these single carb models and can lend some advice.

Thanks!
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Old 04-21-2017, 02:34 PM   #2
Kmosk
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The d stands for deluxe yes. That means it has a chrome dress up kit on it. It does not mean california. I would like to hear what some of the more experienced builders say about the auto vaccume petcock. I believe it can be removed. It has nothinhg to do with milage. Its in case you drop the bike or lay it down . Gas automatically is cut off from the motor if you stall.
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Old 04-24-2017, 10:53 AM   #3
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Thanks for your reply, that's helpful information. I guess for simplicity's sake I'll just leave it off and go bare bones.
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Old 05-21-2017, 10:57 PM   #4
Hr2burn
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I am doing a full frame off build currently and I have disposed of the "fuel pump" on mine. I believe you want to run a longer fuel line, for the same reason when you siphon gas, the longer the tube, the better your flow will be. I am also disposing of the stock air box and all the emmisions crud.
Good luck!
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