The biggest problem, as stated is oil starvation. It leads to broken cranks. The only fix right now is a forged crank. Conversly, our '02 has had no problems as we stayed below 90 hp, which seems to be the limit.
If you do want to build above 90, then be sure to purchase an after market rev-limiter and stay below 9500. There's no significant increase in power beyond that anyway. Just my opinion.