There could be several potential reasons for your motorcycle experiencing a loss of power, backfiring, and stalling while driving, but not exhibiting the same issues when parked. Here are a few possible explanations:
Fuel-related issues: Problems with the fuel system can cause such symptoms. It could be a clogged fuel filter, a malfunctioning fuel pump, or a dirty carburetor (if your motorcycle has one). Insufficient fuel supply or improper fuel mixture can lead to power loss, backfiring, and stalling.
Ignition system issues: Faulty spark plugs, ignition coils, or spark plug wires can result in misfiring and backfiring, leading to a loss of power and stalling. Heat buildup during extended riding may exacerbate these problems, which could explain why the issues arise while driving but not when parked.
Electrical problems: Faulty wiring, loose connections, or a failing battery can affect the electrical system, causing intermittent power loss and stalling. Vibration and movement while riding can worsen these issues.
Air intake or exhaust problems: If there are obstructions or restrictions in the air intake or exhaust system, it can disrupt the proper functioning of the engine. This can result in poor performance, backfiring, and stalling.
Engine overheating: Riding for prolonged periods at high speeds or in hot weather conditions can cause the engine to overheat. This can lead to power loss and eventual stalling. Once the motorcycle is parked, it may have a chance to cool down, which could explain why the issues don't persist when stationary.
To diagnose and fix the problem accurately, it is recommended to consult a qualified motorcycle mechanic or technician. They will be able to perform a thorough inspection, conduct relevant tests, and identify the specific cause of the issues you are experiencing.