I don't know if this is relevant here, but meters and leads have a resistance. To get rid of it, you need to touch the meter leads together and get the reading, then subtract that from any readings you take on the motorcycle. So if the reading you get when touching the leads together is 0.4 ohms and you read 1.2 ohms somewhere on the bike, the actual reading is 1.2-0.4=0.8 ohms.
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