Troubleshooting Your Royal Enfield Classic 350: Why Does It Miss When the Light is On?

Hey there, Royal Enfield fans and handy enthusiasts! Today we're diving into a bit of a conundrum: my Royal Enfield Classic 350 is showing some strange behavior: it misses when the lights are on. Sound familiar?

Common Causes and Solutions

First things first, let's break down the possible causes. The classic culprit is an old coil with magnet. Over time, these components can age and produce less current. If you're experiencing this issue, swapping out the coil might be your first step. Try a fresh ignition coil that will provide the necessary power to your spark plugs. If the problem persists after a coil change, it might be time to consult a professional mechanic, not just an unauthorized service center. Seeking expertise from a certified mechanic can help identify any underlying issues.

The Role of Diaphragms and Fuel Systems

Now, onto the fuel system. If you're not sure why your bike's performing poorly with the lights on, it might be time to delve into the intricacies of your Royal Enfield BS4 model. A tiny diaphragm in the fuel release valve is a critical component. It controls the fuel release by bending inward when pressed by air in the combustion chamber. However, as times progress, the fuel in the tank accumulates, increasing pressure inside it. Eventually, this pressure stabilizes, causing the diaphragm to no longer bend. This interruption in the gasoline supply can result in that pesky 'missing' symptom.

Addressing the Issue: A Special Technique

To tackle this issue, there's a quite ingenious technique that has been effective for me. It's based on managing the vaporized fuel in your fuel tank. Unlike in older models, BS4 engines have airtight fuel tanks. Any unburned vapor is recirculated back into the fuel chamber. Your bike's charcoal canister plays a significant role in this process. This system ensures the vaporized fuel is collected and returned to the tank.

But here's where it gets interesting. As the fuel in your tank accumulates, the pressure inside increases. Over time, this pressure stabilizes, and the diaphragm no longer bends, interrupting the fuel supply. So, to combat this, you can try a simple but effective method:

Perform this gently and check if this resolves the issue. It might seem unconventional, but it can make a big difference. If you find this solution works, you might not need to refill your tank all the way, as a full tank can also cause these issues.

Conclusion

Remember, if you're still grappling with the mystery of your Royal Enfield Classic 350 missing when the lights are on, you're not alone! With some practical steps and perhaps a little bit of extra care, you can keep your ride running smoothly. Don't hesitate to reach out for professional help, and stay tuned for more tips and tricks to keep your loveable classic on the road.