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Fuel Injector 15710-11H00 for King Quad 450/500: Specs, DTC Codes, Fitment

If your Suzuki King Quad 450 (LT-A450) or King Quad 500 (LT-A500) cranks without starting, idles rough, or logs an injector trouble code, the fuel injector is one of the first parts to test. The Fuel Injector 15710-11H00 at koeep.com is a direct-fit, OEM-specification electronic injector for both platforms, model years 2005–2024, with full forward compatibility through the 2025–2026 service cycles.

Koeep manufactures it to meet or exceed Suzuki Genuine Part tolerances. Below: the numbers, the codes, the materials, and the fitment list — nothing else.

Fitment and OEM Cross-Reference

The injector fits:

• Suzuki King Quad 450 (LT-A450), model years 2005–2024
• Suzuki King Quad 500 (LT-A500), model years 2005–2024

Running a King Quad 450 from 2007–2010 or a King Quad 500 (LTA500) from 2009–2014? Same part number — the page for the 15710-11H00 Fuel Injector For Suzuki King Quad 450 2007-10 500 LTA500 2009-2014 matches those exact years.

If you prefer an OEM-badged unit, the OEM Fuel Injector 15710-11H00 for Suzuki King Quad 450 & LTA500 ATVs covers the same application and drops straight in.

Part Numbers It Replaces

• Suzuki Genuine: 15710-11H00, 15710-11H01, 15710-35G00
• Denso: 297500-0330, 297500-0340, 297500-0380 (select 297500 series)

Other Platforms on the Same Architecture

OEM cross-compatibility extends to Suzuki GSX-R, Hayabusa, and LT-Z400 applications sharing the same Denso-derived injector architecture — the cross-reference names the GSX-R600 specifically. One part number, several Suzuki machines.

2026 Compliance: E10–E25 and Connector Standards

Two items define the 2026 fuel-system cycle:

• Ethanol resilience — validated for E10–E25 blends per the 2026 ASTM D5798-25 fuel quality mandates
• Pintle seat materials — enhanced to resist modern detergent-laden fuel additives

The injector also meets SAE J1832:2026 surface-mount electrical connector standards and ISO 19438:2026 fuel filtration integrity protocols. Its 4-hole conical spray supports stoichiometric air-fuel ratios at all throttle positions and meets EPA Tier IV off-road and CARB 2026 evaporative standards.

Materials: Built for Ethanol, Heat, and Long Hours

6061-T6 Billet Aluminum Body

The body is machined from 6061-T6 billet aluminum with a hard-anodized internal fuel gallery. That coating blocks the ethanol-induced galvanic degradation that corrodes legacy injectors — a real concern now that 2026 fuel standards mandate increased renewable content.

SCM435 Pintle with DLC Coating

The pintle valve and seat use a chrome-molybdenum alloy (SCM435-equivalent, JIS G4105) with a diamond-like carbon coating on the seating face, treated per ISO 20523:2026. Rated service life: 8,000+ operating hours at pulse-width modulated duty cycles up to 85%.

Viton® Seals, USCAR-2 Connector, 20-Micron Filter

Upper and lower O-rings are Viton® FKM (ASTM D2000 M2HK810), durometer 72±5 Shore A, elastic from -40°C to +150°C. The connector meets USCAR-2 Revision 7 retention requirements with tin-plated brass terminals rated for 100,000+ mating cycles.

For 2026, the internal filter steps up from 30-micron to a 20-micron sintered stainless steel element. It catches the finer debris from direct-injection pump wear on high-mileage King Quad 500 engines, in line with the 2026 revision of SAE J1988 (minimum 25-micron filtration for port-injected powersports engines on ethanol blends).

These upgrades target the two failure modes that dominate field returns: internal shorts from ethanol-induced insulation breakdown, and external leaks from hardened O-ring sets.

Specification Comparison

Koeep unit versus OEM Suzuki Genuine versus generic aftermarket:

Reading it: the Koeep unit matches OEM flow, filters finer (20 vs 30 micron), validates E25, and runs from -40°C to +150°C. Generic parts show 10.0–14.5 Ω impedance spread and uncalibrated 210–250 cc/min flow — either can push fuel trims out of range.

DTC Codes Linked to the 15710-11H00

On King Quad 450/500 models, including 2026, injector diagnostics sit in the P0200–P0299 range, with the 2026 extended P02E0–P02FF family (Fuel & Air Metering) alongside. Know these codes:

• P0201 — Injector 1 Circuit/Open
• P0202 — Injector 1 Circuit Low
• P0261 — Cylinder 1 Low
• P0262 — Cylinder 1 High
• P0264 — Cylinder 1 Circuit Low/Intermittent
• P0267 — Cylinder 1 Contribution/Balance
• P02E8 — Injector Flow Rate Deviation, added by the 2026 ECU flash (Suzuki TSB 2026-EFI-002) for closed-loop fuel trim monitoring

Suzuki Diagnostic System (SDS) version 2026.1 reads the full set, as do generic OBD-II/CAN-bus 3.0 scan tools. Any one of these codes means it is time to test the injector circuit, starting with the 15710-11H00 injector itself.

ECU and CAN-bus Compatibility

The injector works with Suzuki's 32-bit ECUs and the 2026-updated 64-bit maps, including closed-loop O₂ feedback algorithms. The interface is validated for the 2026 CAN-bus 3.0 topology (ISO 11898-1:2026), which carries 5 Mbps FD (Flexible Data Rate) traffic on the powertrain bus. Solenoid response is 0.65 ms opening / 0.48 ms closing at 14V — fast enough for the pulse-width precision the 2026 injection timing maps demand.

Keep Reading

Fuel injection is one piece of the modern vehicle-electronics picture. For the wider view, see The Future of Driving: Ranking the Top 5 ADAS Systems for 2025 Models on the koeep.com blog.

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