Why does a 125cc motorcycle vibrate heavily at 60 mph?

[StWalker]

125cc motorcycles vibrating heavily at 60 mph is primarily an engine-related issue, which can be attributed to technical problems or improper assembly without proper markings, leading to imbalance and causing this phenomenon. Below is expanded information regarding motorcycle speed regulations: 1. Flat roads: 40-60 mph is considered the economical speed for motorcycles, offering a balance of safety, fuel efficiency, and minimal wear on the vehicle. 2. General motorcycles: Most standard motorcycles can reach speeds of 80-120 mph. 3. Racing motorcycles: Dedicated racing motorcycles can exceed 300 mph. 4. Experimental motorcycles: Scientific research motorcycles can achieve speeds up to approximately 700 mph.

[RobertRose]

I've been riding a 125cc motorcycle for several years and noticed significant vibrations at 60 km/h. Common causes include wheel imbalance or tire wear. Check if the tire pressure is normal, as one side being too hard or too soft can cause high-speed shaking. Additionally, if the chain is too loose, it can also lead to this issue, as the chain may bounce during movement, causing vibrations. It's recommended to adjust the chain tension and lubricate it every few hundred kilometers. Another major factor is loose engine mounting bolts, especially when vibrations worsen after some use. Tightening them or replacing the rubber pads can alleviate the problem. Ignoring this issue is unsafe and can affect handling and tire lifespan. I suggest getting a professional balance test at a shop; it won't cost much to fix. Regular maintenance of the wheels and chain is key when riding.

[SanCourtney]

As someone who commutes daily on a 125cc motorcycle, I've experienced the 60km/h vibration issue many times. Often it's caused by poorly lubricated or overly loose chains. Don't underestimate the chain - excessive vibration increases chain wear and fuel consumption. Additionally, unstable tire pressure is common; just 2-3psi deviation in front tire pressure can cause noticeable shaking at high speeds. Aging suspension systems can also cause this, such as shock absorbers with insufficient rebound. My personal advice is to develop the habit of checking chain tension and lubrication every two weeks. Another factor is unbalanced loading - avoid placing too much weight on one side. Preventing vibrations improves both riding comfort and safety. If vibrations worsen, it's best to stop and inspect chain and tire wear immediately to avoid cascading issues.

[StevenLynn]

When I was riding my 125cc motorcycle at 60 km/h, I noticed significant vibration. I found out it was caused by weight imbalance after modifying the wheels or sprockets. OEM parts are sometimes better balanced. Chain wear or loose gear engagement can also cause vibrations, especially during acceleration. Tire pressure needs to be maintained at the recommended level. Additionally, the engine may resonate at certain RPMs, and vibrations can become more pronounced with low-quality engine oil. It's advisable to first check basic elements like sprocket tension and tire pressure before considering engine-related issues. Early maintenance is far better than waiting for a major overhaul.