at 5k rpm I start breaking up.
when I premix anybody have had this issue ?
I was running supertech tcw3 I recently got quick silver tcw3 synththiec blend to see If it does the same

 

Have been running Supertech TCW3 the past 5 yrs in my 100K mi 12A/80GS @ 8oz/tank with no issues...
What is your mixture ratio? How old are your plugs? When was the last fuel filter change?

Worth $10 to run a can of Seafoam thru a tank of gas (I do this twice a year),
or
maybe even do a pour down the carb as its running (sl-o-o-o-o-owly, you don't want to stall it out with this procedure). If your engine is really carbon'd up this can be a great clean-out procedure. But you will not want to be doing it where you will annoy the neighbors! Smoke is Epic.

I think you have something else going on, but we need more info to assist...

Stu A
80GS
AZ

 

Did you remove the filter to see if it was clogged? Why do you think its clogged? Breaking up at 5K could be many things. More history needed.

 

I will never again try seafoam I did it and it had so much rust coming out my tank I was clogging fuel filter every 20 miles. I think its my fuel tank that has crud inside that's why im breaking up imma have to drop the tank I already got the por 15 gas tank sealer kit . I recently purchased a gallon of quicksilver synthic blend premix thinking it might be the cheap supertech but I was reading a lot of people using it with no issues. my mechanic told me I should try to nylon filter if that don't work I guess amma drop the tank

 

Thats just seafoam doing its job. You need to refurb that tank if that much gunk is coming out. A better filter will just clog sooner.