Buckshot, I use the 1993-2012 YZF600R, not the R6 like you ran, and for a reason, and when you're old enough, I'll tell you. Let me get something else out of the way, I've had "people", come on here and tell me, "you haven"t won any feature's" with your low cost engine, and that's true, but we are almost always in the position to win, and for the cost difference, I'll take that, if this engine package had been a real "ass kicker", how long do you think I'd have been allowed to run it? People who know me, know that I dance to a different drummer, I'm not satisfied running something every one has, I like a different sound, if you will, I like to experiment, but at my age, I don't really like to work on engines anymore, I'd rather put a "bullet in the chamber", and run it, and not have to even adjust the valves, Hell, I don't even like to chg plugs, or oil filters, just race it. I did a lot of research, before I settled on this engine, availability, cost to buy, replacement parts cost, adaptability, ease of changing to a new engine, and a lot of other things, I even bought various engines, and took them apart, and compared them, and this was my choice, and I'm happy I picked it. This engine has been in production longer now, than the old Honda, and is still in production today, rod bolts are 4 bucks ea, rod and main brgs are 5 bucks ea, and all you have to do, is either call, or email your order in, and for 32 bucks, and 3 bucks shipping, you have a new set of rod bolts in about 3 day, not $300.00+ for Carrillo. When I built this engine, I tried to use everything that was needed, off the Old Honda, to keep the cost down, it wouldn't have mattered, if you bought a car, minus engine, you would still have to buy special parts to adapt it to be able to run it, so don't count that stuff, ya gotta have it anyway, but I made patterns, and had castings made, for the parts that were different, but still allowed you to run the stuff from your Honda, bolt on parts, Ignition, oil pump, crank adapter, engine adapter, to interchange from the Honda, thus saving you money, and in my line of thinking, that's a big consideration. Off Ebay, you can buy a complete, low mileage engine for under 600.00, or you can do as I do, and just buy parts, and come in at under 400.00, and the special parts to adapt, that's a one time deal, once you make the change, you reuse that stuff. Now, we still have the weight deal, that hasn't gone away, and with the Hp that all these engines produce, it is a big factor, in a "level" playing field, and it needs addressed, NOW! Bob