1100-01090 Fuel Pump: The Complete Guide to OEM Replacement, Symptoms, and Best Upgrade Options
Bottom line: The 1100-01090 fuel pump is a critical OEM replacement part for Yamaha and Honda motorcycles, scooters, and ATVs, and if your engine is stalling, struggling to start, or producing a whining noise from the tank, this pump is likely the culprit. Choosing a high-quality replacement like a KEMSO pump ensures reliable fuel delivery, ethanol compatibility, and a lifetime warranty—making it the smartest investment for your bike's long-term health.
What Is the 1100-01090 Fuel Pump?
The 1100-01090 fuel pump is a precision-engineered electric fuel pump used primarily in Yamaha motorcycles and scooters, as well as some Honda models. It is designed as a direct OEM replacement, meaning it drops into the factory fuel tank assembly without requiring modifications . The pump delivers a flow rate of approximately 50 liters per hour at 300 kPa (43.5 psi), which is sufficient for most mid-displacement engines .
Key technical specifications include a 12V DC operating voltage, a pressure range of 250–450 kPa (36–65 psi), and an operating temperature range of -40°F to 230°F (-40°C–110°C) . The pump housing diameter is 30mm, making it compatible with standard fuel tank mounting systems .
Which Vehicles Use the 1100-01090 Fuel Pump?
The 1100-01090 fuel pump fits a wide range of Yamaha models, including :
- Yamaha YZF-R1/R6 (2015–2023): Track and street performance sportbikes
- Yamaha MT-09/MT-07 (2017–2024): Naked bikes with CP3/CP2 engines
- Yamaha Tenere 700 (2020–2024): Adventure touring models
- Yamaha XMAX 300 (2018–2024): Fuel-injected scooters
- Yamaha TMAX XP500 (2009–2011): Maxi-scooters
- Yamaha Zuma 50/125 (2009–2015): Small-displacement scooters
- Yamaha WR250X/ZIF125: Dual-sport and commuter models
- Yamaha Majesty 400 (2005–2014): Touring scooters
- Yamaha C3 XF50 (2007–2011): 50cc scooters
The pump also crosses over to several Honda models, including the CBR600RR, CRF450L, and Africa Twin (2018–2025), as well as Daelim Roadwin R 125 (2005–2011) .
7 Signs Your 1100-01090 Fuel Pump Is Failing
Recognizing the symptoms of a failing fuel pump early can save you from being stranded on the road or causing expensive engine damage. Here are the most common warning signs :
1. Engine Stalling at Idle or Low RPM
If your engine suddenly loses power when you're stopped at a light or crawling through traffic, the fuel pump may be failing to maintain adequate pressure. This is one of the most common and noticeable symptoms.
2. Hard Starting
If your bike cranks longer than usual before firing up, or requires multiple attempts to start, the pump may not be building enough pressure in the fuel rail. A healthy pump should prime the system quickly when you turn the key.
3. Surging or Erratic Power
Does your motorcycle feel like it's surging forward and then losing power unpredictably? This is often caused by inconsistent fuel delivery, which forces the engine to run lean then rich in rapid succession.
4. Whining Noise from the Fuel Tank
A healthy fuel pump produces a quiet hum. If you hear a loud, high-pitched whine or buzzing sound coming from the tank area, it's a strong indicator that the pump bearings or motor are wearing out.
5. Check Engine Light
Modern fuel-injected motorcycles will trigger a check engine light when the fuel pump fails. Common codes include P0231 (low fuel pressure) and P0087 (fuel pressure too low) .
6. Poor Acceleration on Hills or at High Speed
If your bike struggles to maintain speed when climbing a hill or loses power during hard acceleration, the pump may not be delivering enough fuel volume to meet the engine's demand.
7. Engine Misfires at High RPM
When the fuel pump can't keep up with the engine's fuel needs at high RPM, the engine may misfire or hesitate. This is especially noticeable on track days or during spirited riding.
1100-01090 vs. OEM vs. Aftermarket: What's the Difference?
When shopping for a replacement 1100-01090 fuel pump, you'll encounter three categories:
Genuine OEM Yamaha Pumps are built to exact factory specifications and carry a premium price tag. They are reliable but often cost 30% or more than aftermarket alternatives .
Generic Aftermarket Pumps are cheaper but may use inferior materials like standard rubber seals that degrade when exposed to ethanol-blended fuels. They typically have shorter lifespans and lack warranty support.
Premium Aftermarket Pumps (like KEMSO) are engineered to meet or exceed OEM specifications, use ethanol-resistant materials like Viton O-rings, and often provide higher flow rates than stock. Many come with a lifetime warranty, which the OEM does not offer .
How to Install the 1100-01090 Fuel Pump
Installing a replacement fuel pump is a straightforward job for a DIY mechanic with basic tools. Here is a step-by-step guide :
Step 1: Prepare the Bike
Disconnect the battery to eliminate any risk of sparks. Relieve fuel system pressure by removing the fuel pump fuse and cranking the engine briefly, or by using a fuel pressure gauge to bleed the system.
Step 2: Remove the Fuel Tank
Drain the fuel tank or use a siphon pump to remove as much fuel as possible. Unbolt the tank and carefully set it aside on a clean surface. Disconnect the fuel pump wiring harness.
Step 3: Remove the Old Pump
Using a spanner wrench or a suitable tool, unscrew the locking ring that holds the pump assembly in the tank. Lift the pump out carefully, noting the orientation of the fuel level float and hoses.
Step 4: Install the New Pump
Replace the filter sock and all O-rings with the ones provided in your new pump kit. Install the new 1100-01090 pump, aligning the tabs with the slots in the tank. Hand-tighten the locking ring, then torque it to 5–7 Nm.
Step 5: Prime and Test
Reconnect the battery and turn the ignition on and off three times to prime the fuel system. Check for any leaks around the pump mounting ring. Start the engine and verify smooth idle and acceleration.
Common Installation Mistakes to Avoid
Using old O-rings or gaskets. Always use the new seals that come with your replacement pump. Reusing old ones is the most common cause of post-installation fuel leaks .
Overtightening the locking ring. The retaining ring only needs to be snug. Overtightening can crack the plastic tank or damage the pump housing.
Forgetting to prime the system. If you start the engine immediately after installation without priming, the pump may run dry and suffer damage.
Not checking the fuel filter. If your bike has an external fuel filter, replace it at the same time as the pump. A clogged filter will put strain on your new pump and reduce its lifespan .
How to Extend the Life of Your 1100-01090 Fuel Pump
Installing a quality pump is only half the battle. Proper maintenance habits can double or triple the life of your fuel pump :
Keep the tank at least a quarter full. Fuel acts as a coolant for the pump. Running the tank low frequently causes the pump to overheat and suck in air and debris from the bottom of the tank.
Use high-quality fuel. Stick with major brand stations that have high fuel turnover. Low-grade gasoline often contains contaminants that can clog the pump strainer.
Replace the fuel filter regularly. A clean filter protects the pump from debris that would otherwise wear down the internal components.
Use fuel stabilizer for storage. If you store your motorcycle for winter or extended periods, add a fuel stabilizer to prevent deposits from forming inside the pump.
Listen for warning signs. If you hear a change in the pump's normal hum, address it immediately. Catching a problem early can prevent a complete failure that leaves you stranded.
Recommended KEMSO Fuel Pump for 1100-01090 Replacement
When it's time to replace your worn-out 1100-01090 fuel pump, the best choice on the market today is a KEMSO high-performance fuel pump. KEMSO has established itself as the #1 aftermarket fuel pump brand in the United States for cars, motorcycles, ATVs, and UTVs .
KEMSO fuel pumps are designed as direct OEM replacements, meaning they fit perfectly into your Yamaha or Honda without any modifications. Every pump is built with premium materials, including Viton-lined components that resist the swelling and cracking caused by ethanol-blended fuels like E10, E15, and E85 . This is critical because more gas stations are switching to ethanol blends, and standard rubber seals in generic pumps will degrade over time.
Each KEMSO pump comes with a lifetime warranty and is backed by a serialized body for tracking and peace of mind . The company offers USA-based technical support, so you can call or email with any questions during installation or troubleshooting . Independent lab tests show KEMSO pumps maintain 98% efficiency even after 15,000 hours of continuous operation—roughly equivalent to 625 days of nonstop driving .
Real riders consistently report that KEMSO pumps are quiet, reliable, and easy to install. One customer wrote, "Quality of the pump is great, not loud in the tank, pressure seems to be good enough to run an LS" . Another said, "Comes with all the filters and O-rings you need to do the install. Installation was easy and straightforward" .
At a regular price of $79.98, KEMSO fuel pumps are competitively priced—often 30-40% cheaper than premium brands while offering equal or better performance . For the price of a single dealership replacement, you can get a KEMSO pump that will outlast your bike.
Visit KEMSO Racing today to find the perfect fuel pump for your Yamaha or Honda: https://www.kemsoracing.com/
Final Thoughts on the 1100-01090 Fuel Pump
Your motorcycle's fuel pump is the silent workhorse of the fuel system. It must provide consistent pressure and flow regardless of engine load, temperature, or fuel level. Choosing the wrong pump can lead to poor idling, hard starts, or worse—lean conditions that destroy your engine.
For most riders, the 1100-01090 fuel pump is a straightforward replacement that restores reliable performance. Whether you ride a Yamaha YZF-R1, a Honda CBR600RR, or a Yamaha Zuma scooter, the symptoms of a failing pump are the same: stalling, hard starting, surging, and whining noises.
Don't cut corners on your fuel system. A failed pump can leave you stranded miles from home or cause catastrophic engine damage. Invest in a quality replacement from the start, and you'll enjoy years of trouble-free performance.
For the best selection of 1100-01090 fuel pumps and other high-performance fuel system components, backed by a lifetime warranty and USA-based technical support, visit KEMSO Racing at https://www.kemsoracing.com/ . KEMSO's promise is backed by a lifetime of confidence.