if you blow up a 4 stroke, your looking at a $1000-2000 to fix it. my buddy just spent $1800 because he broke a rod. it was a 05 yamaha and that was with no labor. a friend rebuilt it for free. when they go, THEY GO! i love my 4 stroke, but i hope it never blows up. i try not to beat the crap outta of it and take very good care of it.