Here is something to think about unless something is broke inside the carbs, you have 3 sections that make your carbs run. You may already know this.
1. Pilot section is the idle section - Good pilot good Idle if its starving it will not burn clean it will be grumpy
2. Needle jet-Jet needle -acceleration to top end. Not knowing your bike, it sounds like its starving for fuel at this point
3. Main jet - Balls out
My opinion Drop the clip on the jet needles to the bottum Test it Sounds alittle better -next step bigger needle jet
give it fuel to burn. Good luck
