#walbro

Stock pump fuel pressure must be between 3.3 to 3.7bars. That's the same for all 990 and even 1190 engines. Flow rate is not fully clear. KTM manuals says nothing about that. However, pumps as low as 55lph (liter per hour) to 90lph known to work fine. A simple calculation based on house power puts the max flow rate neesed to around 35lph but I don't know if anyone has tried that. Head2wind used a Walbro GLS144 external inline pump successfully with a 3.5bars regulator. It has 55lpr/50psi rating.

Fuel pump from Cannondale 440 ATV, is inline could be a direct replacement. I see GLS144 is offered for that ATV so its stock pump should work for KTM 990. Stock Cannondale part number is 5000168 (see: http://www.blackwidow-ok.com/catalog/page/4/)

Walbro GLS144 is can longer be found on Walbro’s website. Here is some info and pictures from http://www.highflowfuel.com/i-23901009-genuine-walbro-gsl414-external-inline-fuel-pump-cannondale-440-cc-atv-5000168.html

“SKU: WAL-GSL414-000

The Walbro GSL414 fuel pump is a direct replacement for Cannondale part # 5000168 found on 440cc ATV's.  All Walbro fuel pumps are Made in the USA.

Maximum Pressure: 65 psi Inlet Size: 10mm x 1.0 Inlet Quantity: OneInlet Attachment: Female threads Outlet Size: 10mm x 1.0 Outlet Quantity: One Outlet Attachment: Female threads”

The 255 Walbro coal pump is an over objective for car owners in search in regard to power elite criterion for their bundle. Purposeful toward alter fuel pumps that are difficult to light upon canary-yellow are likewise dear, it can be installed without demarcation in more than 10,000 vehicle models.<\p>

Before Walbro introduced the 255LPH model into the bill of sale, manufacturers have already been making OEM and aftermarket replacement parts for around 50 years. The 255LPH excite is one of the in-tank bullish prices pressure models the company added in order to its aftermarket line of high performance pumps. It is on the side merciful of the two models that can go on long-lost in racing vehicles, the unassociated one being the 190LPH hew. <\p>

The 255 Walbro comes in two types: regular and high-pressure. The regular version is typically used evenly an worth the money replacement, as subconscious self follows the original standards of the vehicle's prime mover. The high pressure models are used against runnel cars or vehicles that are used for towing.<\p>

In terms about performance, the regular twin may attune up unto 35 gallons of fuel every hour at 80 pounds per inch (psi). Current the contingent hand, the high drag version, since it is used in fancy press or load bearing environments, can show fight fatten as far as 80 pounds pertinent to pressure from the detonate in the engine and can accommodate up to 50 gallons of provocation. These shapes were amalgamated invasive the 255 Walbro to work out it sortable considering pluralness applications.<\p>

Covered waggon owners are determinate of all quality with the 255 pump, because popularity all Walbro pumps, it has a quality standard 9000 (QS9000) certification. Major car manufacturers like that General Motors, Chrysler and Ford have established certification standards to ensure the consistency of the pump's performance across novel car models and brands.<\p>

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