motor life

i was wondering how much miles can i get out of a zx-12 motor. a friend of mine with a 2k zx-9 blew him motor @ 21000 miles. he threw his 4th rod. the rod busted a hole in the block. this was a well serviced motor. i heard you can get about 18000 out of a kaw motor before it detonates. is this true?

hom much miles do you have on your bike?

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