Why is there a slight vibration in my feet when the motorcycle rolls?

Chain and gear friction feel.

During normal driving, the motorcycle enters the performance consumption stage, and various faults may occur, resulting in jitter during the driving period. a) Clutch damage. The reasons for the failure may be:

The meshing clearance of the primary transmission gear is too large; damage to the toothed part of the gear; The gap between the bump on the outer circle of the active disc and the cut in the clutch casing is too large; Damage to rubber shock-absorbing pads; The length of the buffer spring is uneven; There is a gap between the teeth on the clutch housing. b) Loose transmission. The reasons for the failure may be:

The main shaft and the secondary shaft are not parallel; Severe wear of gear or spline shaft holes; Bearings are severely worn or damaged. c) The chain becomes longer and the sprocket profile becomes smaller. The reasons for the failure may be:

When the new car is assembled, the wheelbase error is large, resulting in the relative length of the chain; Due to the long-term jitter impact, the driving sprocket and driven sprocket are severely worn, and the chain is further elongated. d) Wheel swaying. The reasons for the failure may be:

Wheel bearings are worn, and the clearance is too large; The spokes are loose and the rim is twisted and deformed; Severe wear of the rear wheel bearings; The axle fastening nut is loose. e) Wheel mistracking. The reasons for the failure may be:

The front and rear wheels are not mounted on a flat surface; Twisted forks, rear forks and frames; The shock absorbers are unbalanced left and right. f) The direction is abnormally jitter. The reasons for the failure may be:

too much thrust bearing clearance on the fork riser or not enough steel balls; insufficient oil supply of the front shock absorber or wear of parts such as shock absorber pistons; Excessive radial runout of the wheels, too high or too low tire pressure; The inner tube of the fork is bent and deformed. g) Blockage of the fuel supply device. The reasons for the failure may be:Fuel switch is blocked; Excessive fuel filter build-up; The float chamber of the carburetor float is stuck.

In addition to the above reasons, improper operation can also lead to shaking of the motorcycle during driving. It is worth mentioning that to figure out the difference between the concept of motorcycle vibration and jitter, motorcycle vibration is determined by the characteristics of the motorcycle itself, and is closely related to the design, manufacturing and assembly, motorcycle driving jitter is caused by motorcycle assembly, especially operation and use, vibration and jitter can affect the comfort and safety of the motorcycle ride, the former is inherent and cannot be avoided, and the latter can be reduced through correct use and maintenance.

Three-wheeled motorcycles, starting refueling or loosening the throttle or driving shaft shaking: mainly caused by serious wear and tear of the flower insert rod and flower sleeve, and the gap is too large. The hard sound of the starting accelerator or loose throttle or the transmission shaft during driving is a different feeling, mainly due to the serious wear of the cross joint and the flange, and the failure caused by the large amount of movement on the left and right.

The former is better if the shaking is not serious, but the latter needs to replace the cross joint or repair, for example, the wire clamp is included on both sides of the flange to control its left and right movement, which can be improved to varying degrees.

Quite normal.

1. This is the cause of resonance, motorcycles have resonance, which generally occurs more.

At a speed of about 50 or 60, the vibration frequency of the engine overlaps with the vibration frequency of the whole vehicle, and the vibration and noise will become significantly larger, which is the so-called resonance, and when the speed is lower or higher than the resonance speed, the resonance phenomenon will be reduced and disappear, which is a normal phenomenon.

Second, if the vibration is too obvious, you can tighten all the screws on the frame to fix the engine, especially the thicker fixing screws at the rear of the engine, if these screws are not tight enough, it will increase the sense of resonance. If the spiral of the engine is also like this or the screw is not loose, there is nothing to do, which is also related to the quality performance of the engine itself, the manufacturing process and the engine type, etc., the engine quality is poor or the ejector rod machine, the relative vibration is greater.