If your Royal Enfield Bullet 350's rear wheel is making noise while pushing it back and forth with the engine off, there could be a few potential reasons for this issue. Here are some possibilities to consider:
Brake Drag: One common cause of noise from the rear wheel is brake drag. It could be due to misaligned brake pads or a sticking brake caliper. When the brake pads remain in contact with the rotor even when not actively braking, it can result in a dragging noise. You may need to inspect the brakes and ensure they are adjusted correctly or consult a mechanic to address any brake-related issues.
Loose or Worn Wheel Bearings: Another potential cause could be loose or worn wheel bearings. Wheel bearings allow smooth rotation of the wheel. If they are loose or worn out, it can cause noise and play in the wheel. It is advisable to have the wheel bearings inspected and replaced if necessary.
Chain Tension: Improper chain tension can also contribute to noise from the rear wheel. If the chain is too loose or too tight, it can cause vibrations and rattling sounds. Check the chain tension according to the manufacturer's specifications and adjust it if needed.
Sprocket Issues: A worn or misaligned sprocket can create noise when rotating the rear wheel. Ensure that the sprocket is in good condition, properly aligned, and the teeth are not excessively worn. If required, replace the sprocket to eliminate the noise.
Loose Fasteners: Loose fasteners, such as axle nuts or bolts, can cause the rear wheel to make noise when moved. Check and tighten all relevant fasteners to ensure they are secure.
If the issue persists or you are unsure about the cause of the noise, it is recommended to have a professional mechanic inspect your motorcycle. They can diagnose the problem accurately and provide the necessary repairs or adjustments to resolve the issue.