How do you test a valve on a 400ex?
Turn the motor counter-clockwise with a 17mm socket until the motor is at top dead center on the combustion stroke. (Right after the intake valves close) There is an indicator you can see through the smaller inspection cap, TDC is reached when the T mark is lined up with the notch you’ll see.
How much horsepower does a 400EX have?
It has a 28 horsepower engine and the Honda 400EX has a top speed of 72 MPH. The 400EX also sports a sturdy steel frame with removable sub-frame and exceptionally rigid cast aluminum swing-arms.
How to adjust the valves on a Honda TRX 400ex?
Learn how to adjust the valves on a Honda TRX 400EX ATV using a feeler gauge. Tutorial covers intake valve clearance adjustment and exhaust valve adjustment. Buy a feeler gauge: https://www.partzilla.com/product/aft… Honda TRX 400EX valve clearance for the intake valves is .1mm. It’s .12mm for the exhaust valves.
What should exhaust clearance be on Honda TRX ATV?
Tighten the valve adjustment screw until it begins to put tension on the feeler gauge, then tighten the locking nut while holding the adjustment screw in place. This should set the exhaust valve clearance to 0.1mm.
What happens if the exhaust valve is not adjusted?
Exhaust valves perform a similar function, except their purpose is to allow burnt gases to leave the engine. If the valves aren’t adjusted correctly, the engine will not burn fuel at maximum efficiency. Power and mileage then dramatically decrease.
What is the clearance between the intake and exhaust valves?
All of the intake and exhaust valves in an engine must open and close at correct intervals to allow the engine to run smoothly. These valves have a small amount of clearance between the valve itself and the mechanism that activates the valve. This clearance is called “lash.”.
Learn how to adjust the valves on a Honda TRX 400EX ATV using a feeler gauge. Tutorial covers intake valve clearance adjustment and exhaust valve adjustment. Buy a feeler gauge: https://www.partzilla.com/product/aft… Honda TRX 400EX valve clearance for the intake valves is .1mm. It’s .12mm for the exhaust valves.
Tighten the valve adjustment screw until it begins to put tension on the feeler gauge, then tighten the locking nut while holding the adjustment screw in place. This should set the exhaust valve clearance to 0.1mm.
Exhaust valves perform a similar function, except their purpose is to allow burnt gases to leave the engine. If the valves aren’t adjusted correctly, the engine will not burn fuel at maximum efficiency. Power and mileage then dramatically decrease.
What are the problems caused by bad valve adjustment?
Damaged Valves. The most serious result of incorrect valve lash adjustment is damage to the valves and related components. Setting the clearances loosely causes parts of the valve mechanism to hammer together, damaging valves and creating a knocking or rattling sound.