2 spark plugs per cylinder.
The spark plugs in a Honda VTX 1300 can be removed by first removing the spark plug wire. Twist the spark plug out, using a spark plug socket. Reverse the process to install the new spark plug.
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To stop a Yamaha 1300 from backfiring, first ensure that the air-fuel mixture is balanced, as a lean mixture can cause backfiring. Check and adjust the carburetor or fuel injection settings, if applicable. Additionally, inspect the exhaust system for leaks and ensure that the spark plugs are clean and functioning properly. Regular maintenance and tuning can also help prevent backfiring issues.
theres a little plastic chrome cover over both of your cylinder heads they pop off and the plugs are right behind there you will see them
The gap for NGK-R CR9E PLUGS 31-35
According to the Honda VTX1300 Service Manual, the plugs should be gapped at 0.9mm.
You can remove the drain plugs, on your VTX 1300, by loosening the plugs with a 5/8 five sided socket. Turn the plugs to the left to remove them.
There are a few online resources that offer information about the Yamaha FJR 1300, including Motorcycle News, Gogo Cycles, Rider Magazine, Web Bike World, and The Old Bloke.
On the engine, stamped somewhere on the cases
The Yamaha 1300 Tourer, commonly known as the Yamaha FJR1300, typically has a horsepower rating of around 140 hp (104 kW). This power output allows for a smooth and performance-oriented ride, making it suitable for long-distance touring. The engine is a liquid-cooled inline four-cylinder, known for its reliability and efficiency.
To bleed the cluth on a Yamaha Royal Star 1300 first drain all of the brake fluid from the vehicle. After draining the brake fluid pump the brake pedal up and down several times. All oil will then drain from the system.