How do you change the valves on a motorbike?
July 6th, 2009 | 
Author: I was wondering how you would change the Valves on a motorbike to make it start easier
You need to get a good shop manual if you haven’t done it before.There is more to it than just swapping them out.They need to be lapped.If springs are week they will need to be changed too.It’s quite a job for a beginner
What IDLE AIR CONTROL VALVES from other Mitsubishi Galant models fit to my 1997 Galant?
Posted in Valves
you need to remove heads from the jugs <cylinders> and get a valve spring compressor compress the spring remove the keeper keys release the compressor and remove the valve.
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You need to get a good shop manual if you haven’t done it before.There is more to it than just swapping them out.They need to be lapped.If springs are week they will need to be changed too.It’s quite a job for a beginner
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check the easy stuff first. spark plugs ,fuel filter,what kind of bike is it ?who told you it would start easier if you change the valves? i have never heard that .if the valves where not seating good then you would have loss of compression among other things.i have never changed valves but i guess you would have to disconn battery some bikes you have to pull the gas tank.if you change the valves you have to have the seats ground to match your new valves. you know what you should seriouly get a repair manual for year and make .that way you dont screw somthing up .later
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Take it to a reputable repair shop. From your question, you should not attempt this yourself or you will have a basketcase and no mechanic will work on it.
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Is it 2 stroke or 4 stroke, chaning a reed valve in a 2 stroke is easy but 4 stroke you have your work cut out for you, not a job for an amature
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First you must remove the heads and take them to a machine shop to have the valves taken out and new ones put in and ground because this requires precision and special press equiptment not available in most places.It will cost you a few bucks but I would assume if you do the work of removing the heads and replacing them after the heads have been reconditioned it should only cost you probably 50 to 100 dollars per head
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Seriously you need to obtain a service manual for your bike.
Valve jobs are not a light task. And if there is enough wear or damage to actually have to replace the valves, it should be done by someone with the correct tools to seat the new valves properly…and perhaps replace the guides and/or springs if they are worn or not up to spec.
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