Well after trying my friends new Eprom that he got for his Factory Tuono was vey dissapointed had a bad flat spot at 4000 to 6500rpm & fueling low down was dodgy so took it out & sent it back to Guy that made the Chip & talked to him about what it was doing & what it went like & what may have gone wrong with it as the same chip was Mint in his bike , turned out that it some how got Currupted & made the ECU get the wrong information "Eg bike ran like SHIT !" Today the new Eprom arrived & went through the careful job of not damaging it while putting it into my RSVR . Wasn't till after the wifey got home at 4pm that I was able to try this Eprom out so headed of for a test run through some of my back roads . Was blown away with the difference it has made through out the whole bikes Rev range & the very Aggressive power delivery over the RP58 standard Chip . Low down fueling below 3000rpm is very clean & crisp as is 6th gear roll on's from 4000rpm . If anyone with a 03 or less RSV/RSVR or Tuono that is interested in getting one let me know & can put you onto the Guy that is writting these for about $150 they are a excellent Performance boost to ya Aprilia
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