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Piston Install

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Hi All

Does the piston go in dry or with some oil?

I read in the service manual that you have to put some oil on the sliding surface of the piston before going into the cylinder?

I presume the oil goes below the rings on the curved side?

Or do I not bother?

Thanks.

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just a dot on the skirt if you do.no where near the rings.

i personally use none if the engine wil be run immediately.

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Just wondering - When putting another piston in, old to new one do you have to measure for any clearances with the feeler gauges? E.g piston to cylinder etc?

Or do you just removes the old piston put the new piston in and re-assemble engine?

Thanks

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if you want to accurately double check the sizes you'd need a bore guage and a micrometer of the proper size. a caliper would work if you didn't want to be super accurate. you can't use feeler guages.

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Yes but can I just take off the old piston, put on the new one and rebuild back up break in and is all sorted. Go ride

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it should be a direct swap/install.

you should be able to assume that the quality control of your replacement unit is good enough that it is the correct size. my previous post was if you want to double check.

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unless your bike has tons of time or miles,i agree that you can assume the clearance will be correct.

be sure and check the ring end gap.

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