TW200 petcock success - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 74 (permalink) Old 12-23-2012, 05:07 PM Thread Starter
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TW200 petcock success

It had been a while since I've visited these pages but I have some useful information that needs to be spread. I have spent the $30 on the Yahama TW200 petcock in an effort to remove the vacuum operated one stock to our bikes. Many people said it wouldn't flow enough for our carbs and I am here to say otherwise. I have done the standard ear shave and re-jetting procedure detailed many times over on this forum, therefore running more fuel. My TW200 petcock works perfectly. I have run for many miles at 90mph+ to ensure my setup works sufficiently. For skeptical people looking for solid proof, simply compare the in-tank portion of the petcocks, they are identical, and therefore have identical flow capabilities.

I highly reccomend this conversion to those experiencing problems with their stock vacuum diaphragm operated petcocks, it costs the same as the rebuild kit and results in less moving parts.
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post #2 of 74 (permalink) Old 12-23-2012, 08:43 PM
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Originally Posted by Ticked View Post
It had been a while since I've visited these pages but I have some useful information that needs to be spread. I have spent the $30 on the Yahama TW200 petcock in an effort to remove the vacuum operated one stock to our bikes. Many people said it wouldn't flow enough for our carbs and I am here to say otherwise. I have done the standard ear shave and re-jetting procedure detailed many times over on this forum, therefore running more fuel. My TW200 petcock works perfectly. I have run for many miles at 90mph+ to ensure my setup works sufficiently. For skeptical people looking for solid proof, simply compare the in-tank portion of the petcocks, they are identical, and therefore have identical flow capabilities.

I highly reccomend this conversion to those experiencing problems with their stock vacuum diaphragm operated petcocks, it costs the same as the rebuild kit and results in less moving parts.
Welcome to the forum.
Thanks, I have a slight issue with my petcock, I will further check out your suggestion.

Thanks again... and Merry Christmas !

WilliamTech

'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!

Last edited by WilliamTech; 12-23-2012 at 09:01 PM.
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post #3 of 74 (permalink) Old 12-23-2012, 09:34 PM
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Had a problem with my fuel valve leaking, converted it to strarght manual. No more vacuum line or diaphragm. Just like the old bikes I had, when you turn the engine off you turn the fuel valve to off.
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post #4 of 74 (permalink) Old 12-23-2012, 11:02 PM
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Some details would be nice (mebbe a pic)....and Im assuming 3 position...off/on/res.....does it bolt right up ?.....
Its really kind of an ambiguous post without the extras....



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post #5 of 74 (permalink) Old 12-24-2012, 04:14 AM
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Thx, i will look into this when i get to the fuel tank.
Did you simply block the vacuum line from the carb ?
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post #6 of 74 (permalink) Old 12-24-2012, 06:50 AM
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Thx, i will look into this when i get to the fuel tank.
Did you simply block the vacuum line from the carb ?
yes, @ the carb.


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!

Last edited by WilliamTech; 12-24-2012 at 06:57 AM.
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post #7 of 74 (permalink) Old 12-25-2012, 04:54 PM Thread Starter
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It does bolt right up and it just requires, as already mentioned, vacuum lines to be capped/plugged. You'll need a T. My apologies for the lack of pictures and ambiguity that causes , but I really don't think pictures are necessary...it's a petcock replacement.
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post #8 of 74 (permalink) Old 12-25-2012, 09:40 PM
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The description you just provided is fine...thanks...

I just dont understand how it could get the same flow....same size outlet as one side of the stock...I guess this is just an emergency swap for stock VNs....if that...not much of a filter either...






Last edited by Wolfie; 12-25-2012 at 09:48 PM.
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post #9 of 74 (permalink) Old 12-25-2012, 10:05 PM Thread Starter
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Yea, the filter portion is pretty cheap, there're probably comparable to the stock ones though. My tank has recently been recoated so I'm not too worried.

I was initially concerned with the flow rate when I received the TW200 petcock, I stared at it for a while before I figured it out.
The most restrictive portion of both the stock and my replacement is the in-tank portion of the petcock. Same size, same flow capabilities. The stock one just has a built in T under the tank. All you have to do is add your own T, I used a 5 dollar cheapie from Autozone. The change to the system after complete installation of (TW200)petcock and T is; the selector(on-off-res) now closes off the line prior to the T. The stock selector was integrated into the T.
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post #10 of 74 (permalink) Old 12-25-2012, 10:54 PM
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See, many of us have changed over from the crappy plastic Kawi carb inlets to larger ID brass Hi-Flos....I guess with the stock Kawi inlets the Yammer piece would be ok, but beyond that, I just feel it'd be too restrictive....I could be wrong though, as Im willing to bet that a vac actuator can restrict as well if it operates improperly....
Is there enough meat on the Yammy outlet to bore it out some ?....that could work then....

And just so's ya know...I aint tryin to bash yer post...I welcome any mods/innovations...I was just wary of the performance....



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