FAQ

How to check valve clearance motorcycle

How do I know if my motorcycle has valve clearance?

When the valve begins to close, start to look for the TDC indicator. When it lines up with its reference mark, check both rocker arms for free play. If the intake and exhaust rocker arms have some lash and the TDC marks line up, the engine is on the TDC of the compression stroke and you can check your valve clearance.

How important is it to check valve clearance?

Too much clearance means the valves will likely clatter and, over the long term, cause damage to the valves, camshaft lobes or rocker arms. If there’s too little valve clearance, the valves won’t fully close, causing excessive heat, and the engine will lose power.

How often should I check valve clearance?

Check every 5000 miles or so. It should be part of the regular maintenance you do, just like oil changes. Depending on how much you ride it might be once a year or once every two years.

What tool do you use to measure valve clearance?

feeler gauges

How often should I adjust my motorcycle valves?

It depends on the type of bike, and the use. On a supersport, maybe every 10–15K miles. On a tourer, maybe every 20–25K miles. The higher the redline and the harder the use, the more often you will need to adjust the valves.

Can I do a valve job myself?

you can definitely do it yourself. but im warning you now, if youve never done headwork before – it takes finesse and patience. if you have neither, you should go and get a bad head and practice on it.

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Can valve clearance affect compression?

In cases where your valves close too quickly, your engine will lose compression and begin to perform poorly. This is called clearance. Too much clearance causes a rattling sound and lackluster acceleration. Driving with too much clearance leads to less overall damage than driving with tight clearance.

How do you know if you need a valve job?

Engine Power Loss

Another sign that you have valve problems is that you frequently notice a reduction in engine power and performance. … Many things can cause burnt valves, but one of the most common reasons is ignoring leaking seals and guides, or failing to fix other compression problems.

Which valve is intake and exhaust?

Intake and exhaust valves are the final component in the valve train system. They are made of hardened metal that must withstand the extreme conditions of the combustion chamber. They are shaped to have a slim stem leading to a flatter face, with the intake valves often being larger than the exhaust.

What is a valve clearance?

Valve clearances are the small gaps between the tops of the valve stems and the part of the mechanism which presses on them to open the valves . Check the clearances at regular intervals as specified in the car service schedule, and adjust if necessary. Reset the clearances whenever the cylinder head has been removed.

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