Yeah, mine does the same. its fine for first 15 minutes or so but then it progressively shows more revs up to 2,000 more. the engine is at correct revs but the tach shows way more. i took back to pro italia and they noted the problem but have not returned any of my inquiries of fixing the problem. the only real drawback is that i cant redline the engine because it shows 2,000 more than actual so it cuts off that much short. i am a little bummed that pro italia has pretty much blown off my problem but i'm really not all that surprised to tell you the truth.