A motorcycle jerk or backfire can come from the choke not shutting off completely, the fuel jets might be clogged, a gasket or seal may be broken. Valves that are out of adjustment could also be the problem.
A backfire is caused by a misfire... a cylinder fails to ignite the fuel which may cause a stutter, it may also cause a back fire due to it pushing that un-ignited fuel into your manifold where it then ignites from the heat of the other cylinders and boom you have a backfire...
A rototiller may backfire when it is starting because the valves need to be adjusted. Another reason that it might backfire is because you have to replace the spark plug.
The timing may be off. If the timing belt is old then the gears can slip and cause backfiring, or the engine to not run at all.
The engine may backfire excessively. You may also smell a strong exhaust odor in the riding position. In worst cases, it can cause the engine to run lean.
Clutch may need to be adjusted
That is relative. To some he may be a jerk while to others he is not.
He/she may or may not but the very loud noise of the bag inflating can cause temporary deafness and may jerk the head causing a whiplash injury to the neck.
A bad camshaft sensor can cause intermittent starting. The car may just shut off while driving. It also may not start or could shudder and backfire.
This could be the cause if an improper alignment if it happens under normal straight line driving. If the jerk is more prevalent when going on bumpy roads, it may be a sign of bad shocks or springs. If the jerk is occurring during braking situations, the problem may be related to the bearings being worn or warped discs/drums in the braking system.
This could be the cause if an improper alignment if it happens under normal straight line driving. If the jerk is more prevalent when going on bumpy roads, it may be a sign of bad shocks or springs. If the jerk is occurring during braking situations, the problem may be related to the bearings being worn or warped discs/drums in the braking system.
Probably not. A plugged cat would cause a loss of power and the check engine light may come on depending on what year and model vehicle you have.
It may be considered "bad" given the context. However, to jerk a rope, or Caribbean Jerk Chicken are both perfectly acceptible uses of the word.