So my buddy and I were riding the other week and out of no where my buddy's engine siezed up. He has 04 450r. I believe it was from lack of engine oil he was pretty low. The Tranny oil was good tho. It has some aftermarket parts like new radiator and hoses. Bigger radiator. Those expensive flex handle bars, ss black rims. And a aftermarket pipe. What I'm asking is, how much should I pay for this thing. keep in consideration the cost of how much to fix it. I will be doing the work my self I'm just not familiar with what these bikes are worth. He told me $1600. Is that too much?