What is the reason for the pinko gear jam in the motorcycle speedometer?

[Maddox]

Motorcycle speedometer pinko gear jam may be due to lack of lubrication in the bearings. Introduction to the speedometer: The function of the motorcycle speedometer is to display changes in driving speed, including the instantaneous speed of the vehicle, the engine speed, as well as the accumulated mileage. Driving speed is usually indicated by a pointer that constantly changes while driving. Other information is typically displayed using rolling numbers similar to those on an electric meter. Working principle of the speedometer: When the vehicle is in motion, the drive shaft rotates the permanent magnet, whose magnetic field induces eddy currents in the aluminum cup. The interaction between the eddy currents and the magnetic field of the permanent magnet generates torque that overcomes the spring force of the spiral spring, causing the aluminum cup to deflect in the direction of the permanent magnet's rotation. As a result, the aluminum cup turns the pointer by a certain angle.

[StephanieMarie]

I haven't been riding motorcycles for long, but I've encountered the speedometer gear getting stuck several times, mainly because I've been too lazy to do maintenance. Dust and mud accumulate inside, and over time it gets stuck and won't move. Especially after riding in the rainy season, road debris splashes into the drive system, making it more prone to happen. Last time I opened it up myself, there was a bunch of black, greasy sludge clogging the gear gaps, and cleaning it was a real hassle. Now I've learned my lesson—after every ride, I simply wipe down the gear area and use some lubricant spray as prevention. This method has saved me a lot on repair costs, so don't wait until there's a problem to deal with it. Remember, keeping it clean is key.

[VanNatalie]

Having been in the motorcycle scene for over a decade, I've gained a thorough understanding of speedometer gear jamming issues. Most cases stem from gear wear or insufficient lubrication. Wear can result from frequent riding or part aging, while lubrication shortages are especially problematic in dry weather. For instance, frequent interaction between the chain and drive gear can cause jamming if not properly lubricated. Regular application of specialized lubricant can prevent 80% of such issues. Additionally, gears accumulate dust easily on sandy roads, so installing a protective cover in advance helps. Never force-ride when jammed to avoid worsening the problem. Simple maintenance significantly reduces failures.

[DeRowan]

Having repaired many motorcycles, a common cause of the speedometer gear getting stuck is insufficient lubrication or foreign objects getting lodged inside. During disassembly and inspection, dust and sand were found in the gear gaps, and the dried lubricant caused sticking. Temperature changes can also affect it. The solution is simple: clean out the debris and apply some lubricant spray. Only replace the parts if they are severely worn. Regularly wiping the gear area to keep it clean can save a lot of trouble.