JetPrime SLS/AIS Block-Off Cover for Yamaha YZF-R1/M (2010-2026) – JP ES 033

The JetPrime JP ES 033 is a precision-engineered SLS/AIS block-off cover designed specifically for the Yamaha YZF-R1 and YZF-R1M across every model year from 2010 to 2026. Machined from aerospace-grade 7075 aluminium and finished to exacting tolerances, this kit carries the hallmark of a manufacturer whose roots run deep in Italian racing culture — components shaped by competition, not compromise. If your R1 wears an aftermarket exhaust, this is the clean, permanent solution to the pops, bangs and fuelling irregularities that the factory PAIR system causes when it meets free-flowing pipes.

Key Features

• Eliminates exhaust popping and misfires caused by aftermarket exhaust systems by permanently blocking the PAIR/SLS/AIS circuit
• Delivers a stable, reliable air/fuel ratio for precise fuelling and responsive throttle pickup
• CNC-machined block-off plate replaces the original cover and rubber cap, sealing the airbox opening securely
• Allows complete removal of the PAIR system including the valve, cover and all associated hoses for a clean engine bay
• Heat-resistant rubber caps ensure long-term durability under sustained high-temperature track use
• Developed and tested exclusively for the Yamaha YZF-R1 and YZF-R1M (2010-2026)

Design, Finish and Heritage

JetPrime has built its reputation supplying components to trackday riders and club racers who will not accept compromise in either function or appearance. The JP ES 033 block-off cover reflects that philosophy. The block-off plate itself is CNC-machined from 7075 aluminium — the same high-strength alloy used in aerospace and motorsport structures — giving it a superior strength-to-weight ratio and resistance to the thermal and mechanical stresses generated at the engine bay. The finish is clean and purposeful, sitting flush where the factory cover once lived and presenting a tidy, race-prepared aesthetic under the fairing.

The accompanying heat-resistant rubber caps are designed to endure the sustained operating temperatures of track riding, resisting cracking and perishing over time in a way that OEM rubber components rarely manage under repeated high-load sessions. Every dimension of the kit has been developed directly from the R1 and R1M airbox geometry, so fitment is precise and installation requires no modification or fabrication.

Why the PAIR System Needs to Go with an Aftermarket Exhaust

Yamaha's Pulse Air Injection (PAIR) system, also referred to as the SLS or AIS system, was engineered to reduce exhaust emissions on standard silencer setups by reintroducing air into the exhaust ports. On a stock bike with a stock exhaust this works as intended, but when you fit an aftermarket system the increased exhaust scavenging draws excess air through the PAIR circuit in an uncontrolled manner. The result is a lean, erratic air/fuel ratio during overrun — the source of the sharp popping and backfiring familiar to every R1 owner running a slip-on silencer or full system. Blocking the PAIR circuit removes this variable entirely, allowing your ECU or aftermarket tuning unit to manage fuelling accurately and consistently.

Fitment and Compatibility

The JetPrime JP ES 033 SLS/AIS block-off cover is designed to fit the following motorcycles:

• Yamaha YZF-R1 (2010-2026)
• Yamaha YZF-R1M (2010-2026)

Please note: this product is for race use only and is not approved for road use.

Specifications