450 tank valve - Honda Rebel Forum
 
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post #1 of 9 Old 04-28-2019, 07:18 PM Thread Starter
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450 tank valve

I ordered a replacement 450 tank valve and installed only to realize that the new one has 2 small ports to the vacuum pot whereas the old one only had one. Should I plug one, "t" it or is there another vacuum port that I am missing?
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post #2 of 9 Old 04-29-2019, 07:45 AM
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U use one for the petkock [tank valve] and the other one should be t-d and one to each carby to the vaccume idle down ports



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post #3 of 9 Old 04-29-2019, 11:22 AM Thread Starter
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I tried hooking to each port individually and it would not allow fuel to flow. I did not try to block the other one off though now that I think of it
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post #4 of 9 Old 04-30-2019, 09:38 AM
 
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point the fuel line into a can, open the petcock, use some extra vent tubing on the vacuum ports and draw a low pressure with your mouth, you should be able to test if plugging the second one or having to draw low pressure from both works.

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post #5 of 9 Old 05-10-2019, 07:55 AM
 
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Quote:
Originally Posted by wjmrty View Post
U use one for the petkock [tank valve] and the other one should be t-d and one to each carby to the vaccume idle down ports
I'm about to reinstall my newly built carbs with this same petcock. Can you please send a picture of what you're describing. I'd like to see a clear picture of the T and where the lines go. I can't seem to find a very descriptive picture anywhere on the internet.

Also, do you have the fuel line size for the carbs? I know the main fuel is 5mm or 1/4 but cannot find the correct size for the carbs / vacuum lines. Thanks in advance!
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post #6 of 9 Old 05-12-2019, 06:15 AM
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Tha vac lines are 3mm



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post #7 of 9 Old 08-18-2019, 11:19 AM
 
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Does anyone have pictures they could provide for me, please? I have the petcock that has the vacuum line on the left (next to the head). I could really use nice, clear pictures of the setup, please.
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post #8 of 9 Old 08-19-2019, 08:33 AM
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Here are some pics. Hope they help. https://www.hondarebelforum.com/f76/...ock-10039.html

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post #9 of 9 Old 08-19-2019, 09:09 AM
 
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Here are some pics. Hope they help. https://www.hondarebelforum.com/f76/...ock-10039.html
I appreciate the link however I was looking more for the vacuum lines for the carbs. I ended up fixing my issues yesterday, which was after having my carbs rebuilt, I couldn't get fuel to pass through the carbs to the engine.

Issue was actually the break side carb's plunger not moving. Had to cover up the clutch side air intake for the carb and force all air to enter the break side while spraying GDI cleaner, then got the plunger moving. After 4 months of screwing around with this, the bike starts up and runs from cold, perfectly.
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