Thoughts of replacing my cT tank with a BMW type Toaster Tank

The "Pimp my Ride" section for Soviet bloc bikes. Everybody seems to have their own custom add-ons, modifications & accessories. Share your tips and post pictures of them here.
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This is the place for topics concerining modifying and accessorizing your Ural or Denpr.
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mattzahr
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by mattzahr » Fri Apr 14, 2017 12:34 pm

The backpack setup would work well on a sidecar rack too....
'16 cT - Terracotta aka Orange
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jaybird
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by jaybird » Fri Apr 14, 2017 12:38 pm

Try snooping around here for some ideas: https://www.google.com/search?client=sa ... 8&oe=UTF-8

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Jaybird
2005 Gear-Up, Mr. Nat_ural 108,000+ Kilometers and counting
2013 Retro, Black beauty, AKA Lucky "13"
1995 Olive Tourist
1975 Enfield Diesel Bullet
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1974 BMW R 75/6
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kc0yef
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by kc0yef » Thu Nov 21, 2019 6:33 pm

I have the same Idea

Image

mattzahr wrote:
Wed Apr 12, 2017 11:54 am
OK - any of you big brain guys,,,
1974 R90S
1976 R90/100iSh
1983 R100RS basket
2005 Ural Sidecar
1984 VF700F

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kc0yef
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by kc0yef » Thu Nov 21, 2019 6:34 pm

Image
1974 R90S
1976 R90/100iSh
1983 R100RS basket
2005 Ural Sidecar
1984 VF700F

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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by INSUBORDINATOR » Fri Nov 22, 2019 1:39 pm

Then theres the BMW, HEINRICH TOURER & PARIS/DAKAR 8 gal TANK. Sometimes they turn up used, but usually pricey.
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Current Motorcycles: Improved 2002 Ural Tourist.

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Lmo
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by Lmo » Tue Nov 26, 2019 2:14 pm

I knew I was saving these photos for something.

I have an old 6 gal tank that I ran on my R75/5. I love the twin petcocks (makes tank removal a total no-brainer), and the volume made long distance touring much easier (back in the day when I'd ride 250 mile after work on Fridays to visit my sweetie the next state over).

There are a number of 'interference' problems with trying to adapt it to my Dnepr (the forward seat mount is completely different than the Ural). But it isn't just the seat area. I decided that there would be a LOT of cutting and welding to fit this tank.
Back.jpg
Note in these shots that the tank is prevented from dropping down by the front seat mount. If the front mount was not there the tank would drop down BUT there would no clearance for the petcock on either side.
Rt Side.jpg
Side.jpg
Sidecar front strut does not allow tank to drop down, or move completely forward.
Rt Front.jpg
Top triple clamp hits front of tank
Top.jpg
Bottom of tank
Tank Bottom.jpg
I'm still considering aftermarket "Harley" fat bobs; 5 gal. capacity, they're less than $200, and 'universal' mounting kits are available.

Image

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Lew Morris
Dnepr w/ '06 Ural Drive Train
C5 Power Arc
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1973 BMW R75/5 (original owner)
1947 HD FL (long gone, forever regretful)

Robert Whitten
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by Robert Whitten » Tue Nov 26, 2019 4:10 pm

Any suitable container can be rigged to pump into tank while riding down the road on FI rigs. It's piped into the return line from the fuel rail. The bike pump pumps quite a bit more pressure than the injectors need. Older BMWs has a regulator past the fuel rail that bypasses any pressure above 35psi. This sends fuel back to the fuel tank. This is where you T in. A small 12V pump with on off switch is all you need. I have this setup on a custom BMW trike I had built with auxiliary 5 gallon tank.

Robert from TN.
04 Troika,
10 BMW's
3 Harleys
1 Honda
1 Kawasaki
1 Suzuki

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Lmo
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by Lmo » Wed Nov 27, 2019 4:22 am

Older BMWs has a regulator past the fuel rail that bypasses any pressure above 35psi.
Please define "older".
Lew Morris
Dnepr w/ '06 Ural Drive Train
C5 Power Arc
125/42 jets
Drilled slides/
.030" shims

1973 BMW R75/5 (original owner)
1947 HD FL (long gone, forever regretful)

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Tomcatfixer
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by Tomcatfixer » Wed Nov 27, 2019 6:20 am

Lmo wrote:
Wed Nov 27, 2019 4:22 am
Older BMWs has a regulator past the fuel rail that bypasses any pressure above 35psi.
Please define "older".
The '83 K100 was BMW's first fuel injected bike, so at least we know where the "hard stop" is on this definition.
- Chad

Gordonsville, Virginia, USA

Current rides:
2015 Ural cT "Mobile Chernobyl", 2001 Ural Patrol "The Patrol", 1999 Ural Tourist "The RPOC", 1994 Honda VFR750F

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2007 Honda VTR1000 FireStorm (Super Hawk in U.S.)
2001 Buell Blast! - - - - - - - 2005 Yamaha FJR1300
1993 Honda CBR600F2 - -1984 Yamaha FJ1100
Two different 1986 Yamaha FZX700S Fazers

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kc0yef
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by kc0yef » Thu Nov 28, 2019 12:12 pm

Yes a lot of mods are going to have to be done I might cut the bottom of one and weld to the other...
Lmo wrote:
Tue Nov 26, 2019 2:14 pm
1974 R90S
1976 R90/100iSh
1983 R100RS basket
2005 Ural Sidecar
1984 VF700F

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Lmo
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by Lmo » Thu Nov 28, 2019 1:36 pm

Then why not just start from scratch?

Image
Lew Morris
Dnepr w/ '06 Ural Drive Train
C5 Power Arc
125/42 jets
Drilled slides/
.030" shims

1973 BMW R75/5 (original owner)
1947 HD FL (long gone, forever regretful)

Robert Whitten
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by Robert Whitten » Sat Nov 30, 2019 3:37 pm

LMO, As stated 1983 in Europe, 1985 in USA & I know through 2005 or further in the BMW. When I got my first BMW K bike the Lady said her husband told her the fuel pump was out. It was her bike & this was just before he had a massive stroke on his & died. After acquiring it & got it home, the pump was out all rite, as in gone.

I studied FI for a few months to learn how they worked. The mechanical side is extremely simple. The mapping side is the part that's complicated. The pump builds pressure to supply to a fuel rail. All pressure built above parameters goes through a regulator back to the tank to keep a constant pressure on the rail for the injectors. Injectors are basically a solenoid valve that opens & injects fuel when it gets power from the computer according to the mapping programmed. Tho older K bikes as I call them have a .002 opening & produce a spray @ the 35 psi.

On my Oilheads BMW throttle body bikes, they take a fuel filter inside the tank ($45) plus a gasket o ring ($6) & 2-4 hours for me to change. I replaced the filter with stainless brake line tubing in the tank, added FI fuel line & spliced a Wix metal filter ($5) on the outside in line before the fuel rail. Change every other oil change.

An axillary fuel tank would be a breeze to connect to an FI system. Automobile operate on the same principal.
04 Troika,
10 BMW's
3 Harleys
1 Honda
1 Kawasaki
1 Suzuki

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kc0yef
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Re: Thoughts of replacing my cT tank with a BMW type Toaster Tank

Post by kc0yef » Mon Dec 09, 2019 5:28 pm

Well, mostly because I have plenty of those tanks pictured.

Lmo wrote:
Thu Nov 28, 2019 1:36 pm
Then why not just start from scratch?
1974 R90S
1976 R90/100iSh
1983 R100RS basket
2005 Ural Sidecar
1984 VF700F

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