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Adding Markus tank to an Hp2 with a HPN tank
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oldfool
Wed Sep 05 2018, 11:55pm
Registered Member #59
Joined: Sat Jan 24 2009, 06:09am

Posts: 67
I am adding the Markus tank to my HP2 which already has the HPN tank. I'm having problems finding a spot for the pump to go. Has anyone done this and have some advice? It just doesn't seem to fit anywhere. Thanks. Richard.
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SnoDawg
Thu Sep 06 2018, 01:57am
Registered Member #659
Joined: Sun Apr 28 2013, 12:27pm

Posts: 243
Hey Richard,
That is a lot of fuel to be carrying on a big enduro bike. What kind of range are you expecting to cover with all of that petrol?

Sno Dawg
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oldfool
Thu Sep 06 2018, 05:28am
Registered Member #59
Joined: Sat Jan 24 2009, 06:09am

Posts: 67
Hard to say. I know when I'm at high elevation my milage goes up. Maybe 325 miles up in Colorado or the like. I will have to see. It just allows me to go to more desolate places. I like that. I remember carrying a one gallon anti freeze bottle and some small white gas bottles with me in the early days for range. I like having more options.

[ Edited Thu Sep 06 2018, 10:58pm ]
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xrnik
Thu Sep 06 2018, 03:51pm
xrnik
Registered Member #30
Joined: Sun Jan 18 2009, 08:53pm

Posts: 186
I ve put the pump uner the left side panel of hpn tank. this is the only place you can fit it...
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xrnik
Thu Sep 06 2018, 04:09pm
xrnik
Registered Member #30
Joined: Sun Jan 18 2009, 08:53pm

Posts: 186
.
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xrnik
Thu Sep 06 2018, 04:12pm
xrnik
Registered Member #30
Joined: Sun Jan 18 2009, 08:53pm

Posts: 186
.

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oldfool
Thu Sep 06 2018, 09:59pm
Registered Member #59
Joined: Sat Jan 24 2009, 06:09am

Posts: 67
For the moment I am going with what Markus reccomened. No pump. I just need to do some miles and see what happens. I like the idea of the pump so I can know when I'm getting low. Any way it's nice to have 7.9 gallon capacity. If I was going to use the pump the plan was to use the horn switch to power it.

[ Edited Thu Sep 06 2018, 10:56pm ]
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xrnik
Fri Sep 07 2018, 08:25am
xrnik
Registered Member #30
Joined: Sun Jan 18 2009, 08:53pm

Posts: 186
Markus recomened? If use the rear tank you have to find a way to transfer gas from back to main tank. Pump is essential..
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space
Fri Sep 07 2018, 12:19pm
a/k/a Jake

Registered Member #15
Joined: Sat Jan 17 2009, 04:28pm

Posts: 236

I have both and no extra pump ... but I have a rather odd setup, with an external pump that can pull from either the main tank or the Markus tank.  Details here: http://hp2enduro.com/hp2e_plugins/forum/forum_viewtopic.php?3099.0#post_3134
Still works great after a few years and some 20k miles.  I'm very happy with it.
But yes, with the OEM pump I can't think of any way to avoid having a low-pressure pump to transfer the fuel, as the Markus tank sits lower.
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oldfool
Sat Sep 22 2018, 12:48pm
Registered Member #59
Joined: Sat Jan 24 2009, 06:09am

Posts: 67
Just finished my test of the Markus tank with the HPN tank. No electric fuel pump. The fuel is being drawn up into the main tank without the electric pump.Works great.
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xrnik
Wed Sep 26 2018, 05:56am
xrnik
Registered Member #30
Joined: Sun Jan 18 2009, 08:53pm

Posts: 186
how do you transfer the fuel from rear to front without pump?
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oldfool
Wed Sep 26 2018, 09:38am
Registered Member #59
Joined: Sat Jan 24 2009, 06:09am

Posts: 67
The suction created by the original fuel pump draws the fuel up into the tank. Bavarian Markus the inventor of this tank told me he thinks the best way to install this tank is without the electric pump. It is one of the old threads.

[ Edited Wed Sep 26 2018, 10:17am ]
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xrnik
Fri Sep 28 2018, 09:05am
xrnik
Registered Member #30
Joined: Sun Jan 18 2009, 08:53pm

Posts: 186
can you give some more details? thanks
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oldfool
Fri Sep 28 2018, 10:21pm
Registered Member #59
Joined: Sat Jan 24 2009, 06:09am

Posts: 67
Markus tank install. Just connect the gas tank vent tube to the Markus tank and you are done.
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marret
Sat Sep 29 2018, 11:07am
Registered Member #875
Joined: Wed Dec 16 2015, 05:39pm

Posts: 35
I've had the same thing happen even with the pump in place. Fuel is drawn into the main tank without the pump.

I had a situation where I trailered my bike from KY to the mountains of North GA. Route was through TN. When I got to N GA, my main tank was overflowing. I had filled both before departing KY. Since then I installed a petcock between the two tanks. I turn the petcock to the flow position when I want fuel transfer. Hasn't happened again. I don't know if the elevation change or something else caused this to happen.

[ Edited Sat Sep 29 2018, 11:08am ]
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