| When I had the Asymetric termi on 749s and had the original ECU refitted (due to ECU for Termi blowing up), a dyno run showed that the fuel mixture at higher revs was very lean. The dyno guy was concerned I'd been running it like that for long because it was likely to do damage. I'd really recommend getting a PC3 and use the map supplied or get a custom setup to correct it. I ended up using the supplied map and it works very nicely.
I might soon have a brand new ECU spare, for 749 asymetric Termi. It's being replaced under warranty, and I have no intention ditching the PC3 now. | 
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