yep, i know the problem very well. drove last year a yamaha TTR250 from kolkatta to belgium with high altitudes passings at nepal, india, the karakorum highway and armenia. dont have much advice for you but i can tell you that the 250's have there altitudeproblem already once over 2500 meters. for sure. i could arrange the carburator but it didnt always help. its a ****ing haslle and dangerous too. i like 250 travelling. i am now in southeast asia touring around on a 250 but i would do this trip (india-bel) never again on a 250. take something stronger but same style. at least a 400cc. iran has big distances between cities, lost of wind in the dessert and you dont have that problem of the altitude anymore. your better of with another bike.
greetz
niels
|