99 gsx limited mid range bogg

[PRIME]

ski runs fine from 0-1/4 throttle and from 1/2 to full throttle but boggs down severly or dies when trying to cruise in the mid range .carbs were rebuilt at the end of last season,checked the rave valves appear to be working as they should,checked reeds they are perfect,kinda stumped ,anyone with some suggestions?

[rgard32]

if its not the carbs still check the TPS sensor on the throttle cable..i believe it has one since the 99 XPL has one.

[cosmic]

ski runs fine from 0-1/4 throttle and from 1/2 to full throttle but boggs down severly or dies when trying to cruise in the mid range .carbs were rebuilt at the end of last season,checked the rave valves appear to be working as they should,checked reeds they are perfect,kinda stumped ,anyone with some suggestions?

Sounds like to me that your high speed adjustment is out of whack after 1/2 throttle is when the high speed jets takeover......take it to someone with experience tuning rotax's......sounds like a lean consition to me...just my opinion....would have to see in person