2007 Yamaha Raptor 700 Fuel Pump: Symptoms, Replacement Options, and the Best Upgrade
Understanding Your 2007 Raptor 700 Fuel Pump
The 2007 Yamaha Raptor 700 (YFM700R) is equipped with a 686cc liquid-cooled, fuel-injected single-cylinder engine. The fuel pump on this machine is an electric, in-tank pump that sits inside the fuel tank and delivers fuel at a consistent pressure—typically around 43 PSI—to the fuel injector. The original OEM part number for this pump assembly is 1S3-13907-00-00, which was later updated to 1S3-13907-01-00, 1S3-13907-02-00, and the revised assemblies 1S3-13907-10-00, 1S3-13907-11-00, and 1S3-13907-12-00. If you are buying a replacement, you should look for a pump that is compatible with all of these part numbers to ensure it fits your 2007 model.
The complete fuel pump module includes not just the pump itself, but also the fuel pressure regulator, the fuel level sending unit, the fuel filter, and the strainer. When you buy a complete assembly, you get everything you need in one drop-in package, which is the easier and safer route compared to replacing just the pump motor inside the old assembly.
Common Symptoms of a Failing Fuel Pump
Before you run out and buy a new pump, you need to confirm that the fuel pump is actually the problem. A bad fuel pump on a 2007 Raptor 700 will show one or more of the following signs:
1. Hard Starting (Long Cranking Time) – If the check valve inside the pump is failing, fuel drains back into the tank when the ATV is off. This means the pump has to rebuild pressure every time you start it, which causes long cranking times before the engine fires up.
2. Sputtering or Cutting Out at High RPM – A weak pump cannot supply enough fuel volume at high speeds. You will notice the engine sputtering, hesitating, or cutting out when you open the throttle wide, especially in higher gears.
3. Loss of Power Under Load – When the pump cannot maintain proper pressure, the engine runs lean, which reduces power and increases combustion temperatures. Over time, this can cause engine damage.
4. No "Whirring" Sound When You Turn the Key – When you turn the ignition to the ON position, you should hear the electric pump prime for two to three seconds. If you hear nothing, the pump motor is dead or there is an electrical issue with the relay or wiring.
5. Poor Idling and Stalling – A failing pump can cause rough idling, stalling at stop signs, or intermittent starting issues.
6. Whining Noise from the Fuel Tank – A fuel pump that is working too hard or dying often emits a loud whine or hum that gets worse over time.
If you experience any of these symptoms, rule out simpler problems first. Check the fuel lines and primer bulb for cracks or air intrusion, replace the fuel filter if it is clogged, and test the fuel pump relay before condemning the pump itself.
Choosing the Right Replacement Fuel Pump
When it comes time to buy a new fuel pump, you have several options. The most important thing is to buy a pump that is specifically designed for your 2007 Raptor 700. Do not guess or try to use a universal pump, as the fitment and fuel pressure specifications matter for reliable performance.
1. OEM Replacement Assemblies – Many aftermarket brands sell complete fuel pump assemblies that are direct OEM replacements. These come pre-assembled with the pump, strainer, wiring connector, and hardware, so you can simply drop them into the tank and plug them in. Look for assemblies that replace Yamaha part numbers 1S3-13907-00-00 through 1S3-13907-13-00.
2. Complete Module Kits – Some kits, like the one from Moose Offroad (Part #1009-0202), include everything you need in one box and are designed to plug directly into your factory wiring harness. These are built to automotive quality specifications and are a popular choice for riders who want a hassle-free install.
3. Pump-Only Replacements – If your existing assembly is in good shape and only the pump motor is dead, you can buy just the pump unit and swap it into your existing assembly. This is the cheaper route, but it takes more skill and care to do correctly.
Step-by-Step Replacement Guide for the 2007 Raptor 700
Replacing the fuel pump on your 2007 Raptor 700 is a job you can do at home with basic hand tools. Here is the full process, step by step:
Step 1: Prepare the ATV
Park the ATV on a flat, stable surface and turn the engine off. Allow the engine to cool completely. Disconnect the negative battery cable to prevent any electrical shorts while you work. Wear safety glasses to protect your eyes from fuel splashes.
Step 2: Drain the Fuel Tank
If the tank is not empty, use a siphon pump to drain the remaining fuel into an approved container. This step is optional but highly recommended because it makes the job cleaner and safer.
Step 3: Relieve Fuel System Pressure
Locate the fuel pump relay or fuse and remove it. Crank the engine for a few seconds. It will run briefly and then stall, which relieves the pressure in the fuel lines.
Step 4: Remove the Seat and Access Panel
Depending on the model year of your Raptor, you may need to remove the seat and any access panels to reach the fuel tank. Consult your service manual if you are unsure how these come off.
Step 5: Disconnect the Fuel Lines
Locate the fuel lines connected to the pump assembly. Use pliers to squeeze the clamps and slide them away from the fittings. Gently pull the lines off, and mark them with tape so you know which one goes where during reassembly.
Step 6: Disconnect the Electrical Connector
Unplug the electrical connector from the fuel pump. Press the release tab and pull straight out. Do not yank on the wires, as this can damage the harness.
Step 7: Remove the Fuel Pump Assembly
The fuel pump is secured to the fuel tank by a locking ring or mounting bolts. Use a brass punch and hammer (or the appropriate socket) to loosen the locking ring counterclockwise. Carefully lift the pump assembly out of the tank, tilting it slightly to drain any residual fuel. Keep track of the orientation of the float arm and fuel strainer.
Step 8: Clean the Tank Opening
Before you install the new pump, inspect and clean the tank opening thoroughly. Check inside the tank for debris or contamination. Any dirt or sand that falls into the tank will kill the new pump instantly, so take your time with this step.
Step 9: Install the New Fuel Pump
Install the new O-ring seal on the pump assembly. Carefully insert the new pump into the tank, ensuring the float arm moves freely and does not bind. The pump should sit flush with the tank opening. Install the fuel pump gasket and tighten the fuel pump bracket to the factory torque specification of 7.0 Nm (5.1 ft-lb) per the service manual.
Step 10: Secure the Locking Ring
Install and tighten the locking ring clockwise until it is snug. Do not over-tighten, as this can crack the fuel tank.
Step 11: Reconnect Lines and Electrical
Reattach the fuel lines, ensuring they click into place. Reconnect the electrical connector until it clicks firmly.
Step 12: Reassemble the ATV
Replace the access panel and seat, securing all bolts and fasteners properly.
Step 13: Refill and Test
Add fresh fuel, reconnect the battery, and turn the key to the ON position several times to prime the system. Check for leaks around the pump assembly before starting the engine. Once you confirm there are no leaks, start the ATV and take it for a short test ride to confirm the repair.
Troubleshooting Common Issues After Installation
Even with a new pump, you may run into issues. Here is a quick troubleshooting guide:
- The engine bogs down at high RPM: This usually means the fuel strainer is clogged or the pump motor is weak. Replacing the full assembly with a quality unit ensures maximum fuel flow.
- There is no "whirring" sound when you turn the key: This means there is no power to the pump or the pump motor is dead. Check the fuel pump relay first, then verify the pump itself.
- The engine is hard to start when cold: A failing check valve inside the pump allows fuel to drain back into the tank. A new pump with a good check valve will fix this.
- The engine sputters on bumps: This usually means a loose electrical connection or debris in the tank intermittently blocking the intake sock. Ensure the main plug is clicked in firmly.
Why Choose KEMSO for Your Yamaha Raptor 700 Fuel Pump Replacement
When your 2007 Raptor 700 fuel pump fails, you need a replacement that delivers reliable performance without breaking the bank. KEMSO fuel pumps are the smart choice for American riders who demand both quality and value. Every KEMSO pump is built as a high-performance, direct OEM replacement, designed to meet or exceed the original equipment specifications. This means you get the same fuel flow and pressure your Raptor needs, without paying the dealer markup.
KEMSO understands that off-road riding is tough on equipment. Their pumps are engineered with upgraded internal components, including a Japanese armature electric motor, an advanced pressure relief valve, and a corrosion-resistant casing. These upgrades translate into longer pump life, quieter operation, and consistent fuel delivery whether you are racing, trail riding, or tackling tough terrain. And because KEMSO pumps are OEM replacements, they drop directly into the stock location and plug into your factory wiring harness without any modifications.
What really sets KEMSO apart is the peace of mind they offer. Every KEMSO fuel pump comes with a lifetime warranty, which backs their commitment to quality. If you ever have an issue during the life of the pump, KEMSO will stand behind their product. That kind of confidence is rare in the aftermarket parts world.
If you are ready to replace the fuel pump on your 2007 Yamaha Raptor 700 and want a pump you can trust, visit https://www.kemsoracing.com/ to find the right KEMSO fuel pump for your machine. Restore your Raptor's throttle response, fix those hard starts, and get back on the trail with a fuel pump that is built to last.