Fuel Injector 15710-21H10 for Suzuki ATV King Quad 400 2014-2022
This fuel injector is engineered as a direct replacement for the Suzuki ATV King Quad 400 2014-2022. Manufactured to meet or exceed OEM specifications, it delivers reliable performance in demanding conditions. Each unit is tested for fuel flow, pressure rating, and durability before leaving the factory to ensure consistent quality across every order.
Vehicle Compatibility
| Application | Details |
|---|---|
| Fuel Injector 15710 | 21H10 for Suzuki ATV King Quad 400 2014-2022 Condition: New Aftermarket Part Note: We recommend replacing the entire set of fuel injectors to ensure the engine’s optimal performance. Due to differences in oil output and atomization concentration between genuine and aftermarket parts, they should not be mixed. Replacing the entire set of injectors helps avoid potential issues. Replacement Part Number: 15710-21H10, 1571021H10, 15710 21H10 Applications:Fit For Following Models:2014-2022 LT-A400 King Quad 400 (need 1 pc per engine)2014-2022 LT-T400 King Quad 400 (need 1 pc per engine)2015-2016 GSX-R1000 （GSX-R1000L） (need 8 pcs per engine)2013-2019 GSX1300R/ GSX1300RA Hayabusa (need 8 pcs per engine)2013 GSX1300RAL3 – Throttle Body Hose/Joint (Gsx1300ral3 E03)2013 GSX1300RAL3 – Throttle Body Hose/Joint (Gsx1300ral3 E28)2013 GSX1300RAL3 – Throttle Body Hose/Joint (Gsx1300ral3 E33)2014 GSX1300RAL4 – Throttle Body Hose/Joint (Gsx1300ral4 E03)2014 GSX1300RAL4 – Throttle Body Hose/Joint (Gsx1300ral4 E28)2014 GSX1300RAL4 – Throttle Body Hose/Joint (Gsx1300ral4 E33)2014 LT-A400FL4 – Throttle Body2014 LT-A400FZL4 – Throttle Body2014 LT-A400L4 – Throttle Body2014 LT-F400FL4 – Throttle Body2014 LT-F400FZL4 – Throttle Body2015 GSX-R1000L5 – Throttle Body Hose/Joint (Gsx-R1000l5 E03)2015 GSX-R1000L5 – Throttle Body Hose/Joint (Gsx-R1000l5 E28)2015 GSX-R1000L5 – Throttle Body Hose/Joint (Gsx-R1000l5 E33)2015 GSX1300RAL5 – Throttle Body Hose/Joint (Gsx1300ral5 E03)2015 GSX1300RAL5 – Throttle Body Hose/Joint (Gsx1300ral5 E28)2015 GSX1300RAL5 – Throttle Body Hose/Joint (Gsx1300ral5 E33)2015 LT-A400FL5 – Throttle Body2015 LT-A400FZL5 – Throttle Body2015 LT-F400FL5 – Throttle Body2016 GSX-R1000L6 – Throttle Body Hose/Joint (Gsx-R1000l6 E33)2016 GSX-R1000L6 – Throttle Body Hose/Joint (Gsx-R1000al6 E28)2016 GSX-R1000L6 – Throttle Body Hose/Joint (Gsx-R1000al6 E33)2016 GSX-R1000L6 – Throttle Body Hose/Joint (Gsx-R1000l6 E03)2016 GSX-R1000L6 – Throttle Body Hose/Joint (Gsx-R1000l6 E28)2016 GSX1300RAL6 – Throttle Body Hose/Joint (Gsx1300ral6 E03)2016 GSX1300RAL6 – Throttle Body Hose/Joint (Gsx1300ral6 E28)2016 GSX1300RAL6 – Throttle Body Hose/Joint (Gsx1300ral6 E33)2016 LT-A400FL6 – Throttle Body2016 LT-A400FZL6 – Throttle Body2016 LT-F400FL6 – Throttle Body2017 GSX1300RAL7 – Throttle Body Hose/Joint (Gsx1300ral7 E03)2017 GSX1300RAL7 – Throttle Body Hose/Joint (Gsx1300ral7 E28)2017 GSX1300RAL7 – Throttle Body Hose/Joint (Gsx1300ral7 E33)2017 LT-A400FCL7 ASI, (XD3 CAMO) – Throttle Body2017 LT-A400FL7 – Throttle Body2017 LT-A400FL7 ASI,(RED.GREEN) – Throttle Body2017 LT-A400FZL7 ASI (SPECIAL EDITION MATTE BLACK) – Throttle Body2017 LT-F400F FSI L7 – Throttle Body2018 LT-A400F (ASI, RED/GREEN) – Throttle Body2018 LT-A400FC(ASI, CAMO) – Throttle Body2018 LT-A400FZ (ASI, SPECIAL EDITION, MATTE BLACK) L8 – Throttle Body2018 LT-F400F FSI L8 – Throttle Body2019 GSX1300RAL9 – Throttle Body Hose/Joint (Gsx1300ral9 E03)2019 GSX1300RAL9 – Throttle Body Hose/Joint (Gsx1300ral9 E28)2019 GSX1300RAL9 – Throttle Body Hose/Joint (Gsx1300ral9 E33)2019 LT-A400FL9 – Throttle Body2019 LT-F400FL9 – Throttle Body2020 LT-A400FM0 – Throttle Body2020 LT-A400FZM0 – Throttle Body2020 LT-F400FM0 – Throttle Body2021 LT-A400FM1 – Throttle Body2021 LT-A400FZM1 – Throttle Body2021 LT-F400FM1 – Throttle Body2022 LT-A400FM2 – Throttle Body2022 LT-A400FZM2 – Throttle Body2022 LT-F400FM2 – Throttle Body2015-2016 Suzuki GSX-R10002016 Suzuki GSX-R1000 Commemorative Edition2016 Suzuki GSX-R1000 GP2015 Suzuki GSX-R1000 ABS2013-2019 Suzuki Hayabusa GSX1300R2013-2019 Suzuki Hayabusa GSX1300RA ABS2013 Suzuki Hayabusa GSX1300RAZ ABS Limited Edition2014 Suzuki Hayabusa GSX1300RAZ ABS 50th Anniversary2014-2022 Suzuki King Quad 400 LTA400F 4×4 ASi 2014 Suzuki King Quad 400 LTA400FZ 4×4 Limited ASi 2016 Suzuki King Quad 400 LTA400F 4×4 ASi Limited Edition 2017-2022 Suzuki King Quad 400 LTA400F 4×4 ASi SE 2017-2022 Suzuki King Quad 400 LTA400FC 4×4 Camo ASi 2014-2022 Suzuki King Quad 400 LTF400F 4×4 FSi 2015-2021 Suzuki King Quad 400 LTF400F 4×4 FSi Camo 2014 Suzuki King Quad 400 LTF400FZ 4×4 Limited FSi |
Replaces OEM Part Numbers
15710-21H10 • 1571021H10 • 15710 • 21H10 • 2014-2022
Signs You Need a Replacement
If your equipment is showing any of these symptoms, the injectors & nozzle may be the cause:
- Rough idle or misfire — Uneven fuel delivery from a worn injector causes the engine to shake at idle. On engines, this is often accompanied by a knocking sound under load.
- Black or white exhaust smoke — Black smoke means excess fuel; white smoke indicates incomplete combustion. Both point to injector spray pattern degradation.
- Loss of engine power — A single failing injector reduces cylinder output. Multi-cylinder engines lose noticeable power when one injector flows less than the rest.
- Increased fuel consumption — Poor atomization means the engine burns more fuel to produce the same power. Monitor your fuel burn rate as an early warning sign.
- Hard starting or no start — If the injector doesn’t deliver fuel on cranking, the cylinder won’t fire. This is especially common in cold weather with worn nozzles.
- Fuel in engine oil (dilution) — Fuel leaking past the injector seat seal contaminates the crankcase oil. If the oil level rises or smells of diesel, inspect the injectors immediately.
Replace as a Set
Replace all injectors as a set whenever possible. On engines, mixing old and new injectors creates uneven fuel delivery — the new injectors compensate for the worn ones, shortening their life. When installing, use new copper sealing washers and torque to the specification in the service manual. After installation, run the engine at idle for 5 minutes to bleed air from the fuel system, then check for leaks at each injector connection before putting the machine under load.
Frequently Asked Questions
Can I cross-reference 15710-21H10 with 1571021H10?
Yes. Both 15710-21H10 and 1571021H10 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions.
My vehicle is a 2014 model – is it covered?
The compatibility range for this part includes 2014-2022. The 2014 model year falls within this range, but verify the engine code and body type match. Mid-year production changes sometimes mean two vehicles from the same model year use different parts.
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