No, I did not remove the shield. Seems like a LOT of work just to change the oil. I bought an oil extractor on Amazon, for ten or twelve dollars, which works perfectly. Just put the extractor's plastic tube down the dipstick hole to the bottom and suck out the oil with a plunger. Your Yamaha takes 1 quart of 10W30, so it's easy to tell if you got all the old oil. I change my oil annually for less than $10.00.
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