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2008 Vulcan Classic 900 LT
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Discussion Starter · #1 ·
So question has anyone used the quantum fuel pump rebuild kit and it worked. I have seen some post saying it doesn't keep enough pressure at higher throttle and then other post saying it does. Has anyone installed it if so how did it work out.
QFS T35 Intank Fuel Pump w/ Regulator for Kawasaki Vulcan 900 Classic (VN900) EFI 2006-2021, Replaces 49040-0022

HIGHFLOWFUEL.COM
QFS T35 Intank Fuel Pump w/ Regulator for Kawasaki Vulcan 900 Classic (VN900) EFI 2006-2021, Replaces 49040-0022
HFP-386-UR2, Quantum T35 Intank Fuel Pump w/ Regulator for Kawasaki Vulcan 900 Classic (VN900) 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020, Replaces 49040-0022, 670E5075, 490400022, 670E5075
 

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If memory serves, there is an early Quantum model and a late model fuel pump. The early model did not hold fuel pressure very well which created problems. The later model is much more consistent at holding fuel pressure. I think the HP386 is the later model, but don't quote me on that. The fuel pressure needs to be 44psi, and the Quantum website should indicate the pump that produces this pressure. I think you need to double check the connections as well.
 

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Discussion Starter · #3 ·
If memory serves, there is an early Quantum model and a late model fuel pump. The early model did not hold fuel pressure very well which created problems. The later model is much more consistent at holding fuel pressure. I think the HP386 is the later model, but don't quote me on that. The fuel pressure needs to be 44psi, and the Quantum website should indicate the pump that produces this pressure. I think you need to double check the connections as well.
So there site list 3 different ones for mine not sure what they are talking about. Mine is a 2008 vulcan classic lt 900. I am assuming mine would be the first one listed here I guess. Are these worth buying?

QFS T35 INTANK FUEL PUMP W/ REGULATOR FOR KAWASAKI VULCAN 900 CLASSIC (VN900) EFI 2006-2021, REPLACES 49040-0022
QFS INTANK EFI FUEL PUMP FOR KAWASAKI VULCAN 900 CLASSIC (VN900) UCT30 2006-2021, 38MM DIAMETER
QFS INTANK EFI FUEL PUMP FOR KAWASAKI VULCAN 900 CLASSIC (VN900) UCT35 2006-2021, 35MM DIAMETER
 

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Again, if I remember correctly, the UTC30 (HFP382) is the older pump, and UTC35 (HFP386) is the newer better fuel pump. I also seem to remember you need to double check the electrical connections, because I believe they are different. I have never changed my fuel pump, so I'm quoting this from my memory of this forum. I also think it strange these 2 pumps replace the same Kawi part number fuel pump.
 

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Discussion Starter · #5 ·
Again, if I remember correctly, the UTC30 (HFP382) is the older pump, and UTC35 (HFP386) is the newer better fuel pump. I also seem to remember you need to double check the electrical connections, because I believe they are different. I have never changed my fuel pump, so I'm quoting this from my memory of this forum. I also think it strange these 2 pumps replace the same Kawi part number fuel pump.
Thanks for replying to me this is the one that I think actually says replaces the pump I have it says it is the QFS T35 the first one 386-UR2 does that sound correct. Maybe I should call them Looks like they are 3 different sizes. Very confusing.

QFS T35 Intank Fuel Pump w/ Regulator for Kawasaki Vulcan 900 Classic (VN900) EFI 2006-2021, Replaces 49040-0022
HFP-386-UR2, Quantum T35 Intank Fuel Pump w/ Regulator for Kawasaki Vulcan 900 Classic (VN900) 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020, Replaces 49040-0022, 670E5075, 490400022, 670E5075
www.highflowfuel.com
www.highflowfuel.com
QFS T35 INTANK FUEL PUMP W/ REGULATOR FOR KAWASAKI VULCAN 900 CLASSIC (VN900) EFI 2006-2021, REPLACES 49040-0022
 

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2008 Vulcan Classic 900 LT
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Discussion Starter · #6 ·
Again, if I remember correctly, the UTC30 (HFP382) is the older pump, and UTC35 (HFP386) is the newer better fuel pump. I also seem to remember you need to double check the electrical connections, because I believe they are different. I have never changed my fuel pump, so I'm quoting this from my memory of this forum. I also think it strange these 2 pumps replace the same Kawi part number fuel pump.
The utc-30 looks like a different electrical connection
and the utc-35 looks like it does not have the regulator with it. I am thinking it is the same as the first one T-35 without the regulator
 

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If you look at the images on the website, they use different connectors. You need to match the new one to your pump.
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I bought a Kemso fuel pump kit off Ebay. So far it's working flawlessly in my 1700 Voyager. The 900 uses the same pump.
 

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Discussion Starter · #10 ·
I bought a Kemso fuel pump kit off Ebay. So far it's working flawlessly in my 1700 Voyager. The 900 uses the same pump.
I looked those up on ebay and they don't come with the regulator. If I am in there I want to replace it all. From my knowledge and what I have read it is going to be more the filters clogged up than the actual pump. Why Kawasaki would make it where it has a infernal filter is stupid Oh wait that is so you have to be forced to buy there's for $400 way over priced item lol. Any rate I am going to tear it down and see if the filters looked clogged and see if I can back flush the one in the inside.
 

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I think the tank has a vent, and a hose connects to it. I also think a valve connects to the other end of the hose. Someone can correct me on this.
 

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The vent in in the front of the tank. The hose connects next to the meter nacelle. It's easy to get to once the chrome speedo cover is removed.
 

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Discussion Starter · #15 ·
So the cap does not vent just that hose with the check valve in it
 

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I don't think the valve is a check valve (one way valve). I think it's an electric valve that is part of the emissions control of the bike.
 

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Discussion Starter · #17 ·
I don't think the valve is a check valve (one way valve). I think it's an electric valve that is part of the emissions control of the bike.
Ok looks like it runs to the back of the tank and then down to the bottom of the bike with another hose. So again I am guessing that the gas cap dose not vent on this one then would that be correct.
 

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Discussion Starter · #18 ·
Ok so here is why I had originally asked this question. It was a very hot day earlier this week and when I was riding about an hour away I felt my bike cut out when letting off the throttle. Then as I rode more it bogged down while under a pretty good load. Had always ran great since I bought it this was the first time experiencing anything like this on this bike. Gas tank is very clean looking down in it bike has not set as I ride almost daily somewhere on it usually long long rides. So I was thinking maybe the fuel filter was clogged or I did fill up that morning before heading out could have gotten some bad gas maybe but at any rate finally got a little time to start looking today and the first thing I did was pull the air filter I am adding images of what it looks like. It is dirty could that cause what was happening by chance? Really felt like a fuel issue. I am not sure if this is a factory filter or a k&n filter does anyone know. If I&n I was going to try an clean it. I appreciate any feedback but this will be my first thing to change to see if it helps. I was able to get the bike home riding it that day but had to be gentle on the throttle. As I got close to the house I floored it a couple times and it did not cut out anymore under load the rest of the way home. I hate intermittent stuff hard to diagnose those kind I know. After cleaning or changing air filter will ride to see if it does it again with my extra key in the gas cap so if it does do it I will open cap see if it quites to rule out vent problem. This sound like a good plan to y'all
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Discussion Starter · #20 ·
Short answer yes an air cleaner that dirty will cause performance issues
I understand it will cause performance issues the question is will it cause it to bog down like it cut off? I still think I need to be looking at fuel related issues but getting a new one of these as well as it needs it for sure. I do not think this is my main issue though.
 
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