I take it easy for the first 10 min shut it off and check for leaks, cool it down and do it one more time then let it rip. The reason for me to take it easy is so the rings can wear into the cylinder do to the tight clearance and don't want to take a chance of getting it to hot the first run or if any thing is not right. On my dirt bike I do the same thing two 10 minuet heat cycles and then go for it.
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