the bike is running, and only has a problem at a set rpm range, albeit a narrow one at that..... he has substituted n alternative box from a supposed correctly running machine, and his bike still exhibits the same syndrome.....
are you getting a hint on this yet?
I'm sure even Steve will agree $#!+ happens during the shipping process, and might need to be looked at....your carbs may not be responding to the old fuel you had in your tank....you did drain and clean it didn't you.....
??
mmmmmmmmmmmmmmmm?
?
carry on.
i'm out.
sorry, but I say this becaues I have spent hours on peoples carbs, put them on and ran the bike where I couldn't get my finger off the start button before it started, and synched the thing just by looking at the screws.... (so close they never wanted to be touched), only to have someone stick the tank back on (even though I told them to dump it, clean it, and put it on dry...and add CLEAN fuel) and had them call me a month later telling me the bike was F'd up........yeah. I hear ya. sorry, no rebates after 30 days.