Will these fit my 2021 street bob?

Yes they should I put them in my 2018 CVO Streetglide with 117 and the bike runs great

do they work on 2011 fz8 yamaha ?

I used these Iridium Spark Plugs in a 1990 Yamaha VMax, and a 1998 Suzuki 1500 LC and I gained 4 MPG On both bikes! They will work better in any engine!

Amazon confirmed fit said this fit on my 2019 harley fat boy but i need to confirm the gap. what is gap on this spark plugs?

These come pre-gapped from NGK at .031" (0.8mm)

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4 NGK Spark Plugs Suzuki GSX1300R Hayabusa 99-07 CR9EIX

Product ID: 413246178

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Details

Brand
NGK
Core Material
Nickel
Thread Size
10 millimeters
Top Material Type
Metal
Vehicle Service Type
Motorcycle

⚡0.6mm Iridium fine wire electrode

🔥Heat Range 9 optimized performance

🔧10mm thread, 19mm reach precision fit

Description

⚡ Ignite your ride with precision power!

PERFECT FIT DESIGN - 10mm thread with 19mm reach and 5/8" hex size ensures seamless installation on GSX1300R Hayabusa
TRUSTED NGK QUALITY - OEM-grade spark plugs trusted by professionals for consistent, reliable ignition
OPTIMIZED HEAT RANGE 9 - Engineered to maintain ideal combustion temperature for peak performance
PRECISION IRIDIUM ELECTRODE - Ultra-fine 0.6mm center electrode for superior ignition and fuel efficiency
DURABILITY MEETS PERFORMANCE - Tapered cut ground electrode and resistor design reduce misfires and extend spark plug life

These NGK CR9EIX Iridium IX spark plugs deliver high-performance ignition with a fine 0.6mm iridium electrode, optimized heat range 9, and precise 10mm thread fitment, designed specifically for Suzuki GSX1300R Hayabusa models from 1999 to 2007. Engineered for durability and efficiency, they ensure reliable starts and enhanced fuel combustion for the ultimate riding experience.

Specifications

Manufacturer	NGK
Brand	NGK
Product Dimensions	8.41 x 2.39 x 8.43 cm; 0.28 g
Item model number	CR9EIX
Manufacturer Part Number	CR9EIX
Manufacturer	NGK
Item Weight	0.28 g

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