Hey guys, I'm looking at an 04 ZX10r that has a shit ton of upgrades, carbon and Vortex everything, ohlins everything, full leo vince, etc. looks to be in very good condition overall. problem is, it has a blown engine. sounds like a dropped valve or possibly a broken crank. I do all my own work, and i've done a couple top end rebuilds and am confident I could fix it if it's fixable, or put in a replacement engine if it isn't. he wants about 40% of typical value for this year, which I think is a little high, and he's not budging. I could buy an ebay engine and still come out about $1500 under typical selling price, or part it out and prob make around $1500-$2k. or I could keep it and use it as a trackday bike. plus i've been itching for an engine to rebuild. is that the dumbest idea ever?