I'm spliting cases on my 02 yz426 due to broken valves and the shavings they left behind. Is there anything i should watch for or take very extra care doing? How hard is it really? I'v done 2 two strokes to replace crank bearings but never a four stroke. I'v already got the head and cylinder off due to the broken valves. I'm a Ase certified auto tech, and have been wrenching in the auto field for a few years now so i should have most the tools and common sense on how things work and how to fix them. My biggest worry is the trany, anything going to pop outa place the i need to watch for? Any feed back from people who have split their yzf's open would be awsome, thanks!