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2007 grizz 660 camo sold 2019 honda passport 2001 breeze 125
2007 grizz 660 camo sold 2019 honda passport 2001 breeze 125
2007 grizz 660 camo sold 2019 honda passport 2001 breeze 125
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Adjusting the valves on an ATV is one of the most important maintenance steps. Ignoring this operation will adversely affect the operation of the engine, make it difficult to start the ATV, and even lead to a number of serious breakdowns. Therefore, it is important for the rider to figure out when it is necessary to carry out the adjustment and whether it is worth performing the procedure on their own or it is better to seek help from an ATV store in Kyiv.
Experienced motorists advise adjusting the valves on the ATV immediately after purchasing the equipment. The fact is that when assembling devices (especially Chinese ones), manufacturers do not pay due attention to this procedure. And the operation of ATVs with incorrectly adjusted clearances leads to:
The second clearance setting should preferably be done when the vehicle is running in. That is, after 300-350 km of the way, the rider should check the cylinder head.
Please note: An operation such as adjusting the valves on an ATV is considered a mandatory maintenance item and should be carried out every 1000-1500 km.
Before adjusting the valves, you need to prepare the quadric for the procedure. To do this, it is recommended to raise the front of the ATV. This will clean the cylinder head oil bath and remove excess fluid.
Then dismantle the body parts that make it difficult to get to the valves. However, it all depends on the model of the quadric, in some devices you can get to the cylinder head without removing the plastic parts and assemblies.
The rider also needs to prepare tools: an 8 wrench (better with a head so as not to damage the nuts), measuring probes (you can find them in any auto shop) and a hammer.
Let the machine cool down before adjusting the ATV's valves. The procedure is performed "cold", so it is better not to start the ATV before adjusting.
In fact, adjustment is a basic operation, so even a novice ATV rider can perform it. The driver only needs:
After making adjustments, start the ATV and observe engine operation. It is possible that at first the device will make a slight tapping sound. However, if the knock is strong, then the valves were not set correctly.
Important: Do not load the ATV heavily after adjustment. Carry out a mini run-in (5-10 km). Also, during the trip, listen to the sounds that the ATV engine makes.
02/19/2021 4002
Adjusting the valves on an ATV is a maintenance procedure. As a rule, the first adjustment of valves on modern ATVs is made after a run of 1000 kilometers. We recommend checking the valve clearances of the ATV and, if necessary, adjusting them after 300-350 km.
Very often, especially on Chinese-made ATVs, the gaps are set incorrectly right from the factory, also due to heating and cooling cycles, the valves can stretch and the gap will be broken, which can subsequently lead to damage to the valve plates, deterioration of the timing mechanism and even to valve burnout.
So if you're serious about engineering and want to maximize the performance of your ATV engine, don't be lazy and check the valve clearances during your first service.
How to adjust the valves on an ATV.
Before unscrewing the valve cover, we recommend lifting the front of the ATV with a winch to empty the cylinder head oil sump, this will allow you to stay a little cleaner when removing the cover and not stain the ATV parts with oil. By the way, some ATVs have special adjustment windows to avoid removing the valve cover completely.
You may need to remove the gas tank plastic lining and the gas tank to remove the valve cover.
Attention! When adjusting the ATV engine must be absolutely cold (30-35 degrees).
Next, you need to unscrew the cylinder head cover or windows (it is better to use a head, and not a ring wrench, so as not to damage the edges of the bolts). After all the bolts are unscrewed, the cover may not immediately give in, in order to move it, it is better to lightly hit the bottom edge of the cover with a hammer through a wooden block.
Do not attempt to use sharp objects to avoid damaging the lugs on the lid.
After removing the cover, carefully remove the rest of the gasket from the cover and from the head so that they do not enter the engine.
Next, you need to set the cylinder to TDC (top dead center) of the compression stroke. If you are wondering what is top dead center, we suggest you read the article about the ATV engine and its device.
So, in order to catch the TDC, you need to unscrew the viewing window cover, unscrew the spark plug (required) and crank the crankshaft with a manual starter (kick starter) until a special mark appears in the viewing window.
Sometimes the mark is applied incorrectly and therefore it is better to check the TDC control, being safe, by checking the position of the valves. All dead center valves must be closed.
We need special feeler gauges to check the clearance. They are sold at any auto shop.
Next, we need to check the valve clearance, for which the probe is inserted into the valve stem clearance.
Valve clearance is different for each ATV model, and you can find its value in the manual for your ATV.
The stylus should enter the gap freely (should not cause scratching when moving in the gap), but at the same time, a 0.01 mm larger stylus should not enter the gap.
If you notice that the valve clearance on your ATV does not match the manufacturer's instructions, you need to make an adjustment.
To do this, loosen the lock nut and adjusting screw, insert a feeler gauge of the correct size into the gap, turn the adjusting screw until it contacts the feeler gauge, and fix the lock nut. Then check the gap again.
It is not necessary to tighten the nuts hard, a medium hand force on the wrench is sufficient.
After all valves have been adjusted, the cylinder head cover must be reinstalled. To do this, lubricate the tidal surface of the cover with a heat-resistant sealant with a thin even layer (it is not worth saving on it).
