Introducing the KTM EXC Fuel Pump Assembly from Altus! Power Your Off-Road Adventures! ***

John
Feb 5
4 min read

Updated: Feb 24

At Altus Scooter & Motorcycle Parts™, we're passionate about fueling your passion, whether it's conquering Seattle's muddy trails or pushing limits on rugged terrain. We're pumped (pun intended) to roll out our latest offering: the KTM EXC Fuel Pump Assembly. Tailored for the 250 EXC-F, 350 EXC-F, and 450 EXC-F models, this aftermarket powerhouse is your go-to for reliable fuel delivery in the dirt. If your bike's struggling with hard starts, power loss under load, or inconsistent throttling, this assembly could be the fix to get you back shredding without skips.

What is the KTM EXC Fuel Pump Assembly?

This in-tank EFI fuel pump assembly is a complete, direct-replacement module (aftermarket equivalents like HFP-A488 or "All Balls" kits) that mirrors OEM parts such as 78107088000, 78107088300, and 78107088500. It includes the pump motor, pressure regulator, integrated fuel filter/strainer, fuel level sender, and a wiring harness with multi-pin connector. Constructed from high-grade metal and durable plastics, it features corrosion-resistant internals, flexible corrugated hoses for vibration tolerance, and quick-connect fittings for seamless integration.

Key physical highlights include:

A robust black plastic housing with mounting flange and metallic pump core for secure tank installation.
Protective sheathing on wires (typically red, blue, black) and hoses to withstand dirt, moisture, and heat.
Built-in check valve to maintain pressure and prevent backflow.
Compact, lightweight design optimized for enduro bikes' slim fuel tanks.

Ethanol-compatible up to E10, it's engineered for 100,000+ miles of abuse in demanding off-road conditions, ensuring consistent performance without the OEM price premium.

Product Specifications

Here's the nitty-gritty to confirm it's the right fit for your ride:

Model/Part Numbers: Compatible with OEM 78107088000, 78107088300, 78107088500, 77707088000, 79007088000, 79107088000, 78107088100, 79707088000; aftermarket like HFP-A488, QFS equivalents.
Compatibility: KTM 250 EXC-F (2011-2021+), 350 EXC-F (2011-2021+), 450 EXC-F (2011-2021+); also fits related models like 500 EXC-F, SX-F, XC-F variants, and some Husqvarna/Husaberg crossovers (e.g., FE 450).
Fuel Type: Unleaded gasoline, up to 10% ethanol (E10).
Power Source/Electrical Input: 12V DC from the bike's electrical system; low current draw (typically <5A) for efficiency and reduced heat.
Output Fuel Pressure: 48-53 PSI (3.3-3.65 bar), matching OEM specs for optimal EFI operation.
Flow Rate: 35-50 liters per hour (LPH) at rated pressure, sufficient for stock or tuned 2-stroke/4-stroke engines under high-rev loads.
Dimensions: Approximately 10-12 inches overall length (hose extended); pump body ~4-6 inches; fits standard EXC tank openings (exact varies by variant).
Weight: Around 1.1 pounds (500 grams).
Operating Temperature: -20°C to 60°C (-4°F to 140°F), ideal for extreme off-road environments.
Max Operating Altitude: Performs reliably up to 3,000+ meters with minimal derating.
Materials/Construction: Metal pump core, plastic housing/flange, rubber seals/gaskets, and high-pressure hoses.
Installation: In-tank drop-in via fuel tank access; requires tank draining, basic tools (pliers, screwdrivers), and ~30-60 minutes; no wiring mods needed.
Maintenance: Replace inline filter every 10,000 km; inspect for clogs annually; drain fuel for extended storage to prevent varnishing.

How It Powers Your KTM EXC

At the core of your EXC's fuel-injected system, this assembly pumps gasoline from the tank to the injectors at precise pressure and flow, ensuring crisp throttle response and power delivery on technical trails or high-speed sections. Mounted inside the fuel tank, it integrates with the bike's ECU for on-demand operation, and the built-in sender keeps your fuel gauge accurate.

Here's how it shines:

Consistent Performance: Maintains steady pressure to avoid lean spots or bogging, crucial for enduro racing or long hauls where reliability is key.
Application Scenarios: Perfect for the 250/350/450 EXC-F's 4-stroke engines, supporting tasks from tight single-track to open desert runs. It handles the demands of EFI systems on models with 249cc-449cc displacements.
Durability in the Dirt: Vibration-dampening design and filters protect against contaminants, extending life in dusty, wet conditions common to off-road riding.

Common issues like low pressure (below 48 PSI) can cause no-starts or hesitation—replacing with this unit often resolves them, as seen in DIY videos and forums.

Why Choose Altus for This New Offering?

We get the thrill of off-road, and we know a failed fuel pump can kill a epic ride. This EXC assembly embodies our focus on quality, affordable aftermarket parts that rival OEM without the markup. It's a smart choice for keeping your KTM charging hard.

Benefits you'll love:

Trail-Ready Reliability: High-pressure consistency for uninterrupted power.
Longevity: Exceeds 100,000 km with proper care, ethanol-resistant.
Simple Swap: No mods, just plug-and-play for quick fixes.
Value-Driven: Our support includes fitment tips tailored for riders in rainy spots like Seattle.

Ready to Rev Up Your EXC?

If you're gearing up your KTM 250, 350, or 450 EXC for the next adventure, snag this fuel pump assembly and ride with confidence. Reach out to Altus Scooter & Motorcycle Parts™ for more info, compatibility checks, and sharp pricing. Let's keep the dirt flying!

Ride hard...

Remember: Ride safe. Ride far. Be Considerate. And have Fun!

+++

Make sure your mechanic uses

Quality Affordable & Reliable

Altus Scooter & Motorcycle Parts™

Since 1997, Taiwan-based Altus Scooter & Motorcycle Parts™ has been the most reliable long-term driving force and partner behind affordable leading-edge fuel delivery systems for scooters, motorcycles, jet skis, and small boat outboard engines. Our products include a full line of high-quality replacement fuel pump assemblies, plain fuel pumps, ECUs and fuel filters.

Return regularly to Altus Scooter & Motorcycle Parts™ for more updates!

Go see Altus Scooter & Motorcycle Parts™ Now!

Altus offers international product shipping for all products.

Altus also offers full replacement service for scooter and motorcycle console display LCDs - available only at Altus’s Taiwan Taichung 豐原區 factory. LCD replacement service takes only about 15 minutes.

About Altus:

Since 1997, Altus Scooter & Motorcycle Parts™ has been the driving force behind cutting-edge fuel delivery systems for scooters, motorcycles, jet skis, and small boat outboard engines.Our products include a full line of high-quality replacement fuel pump assemblies, plain fuel pumps, ECUS and fuel filters.