GS300L, carbs cutting out on decel after heavy throttle

[Guest]

It's me again, fellers!

So the bike has carried me to work and back reliably(with the exception of replacing the R/R and stator) all year long, from 16° to 103° temps, rain, shine, snow, you name it. My one gripe is that it cuts out completely when I drop the throttle back to cruise range from anything beyond say, 1/2-3/4 throttle? Here's a little vid of what's going on.

https://youtu.be/HmDeX5-mkLc

Any ideas why it's doing this? I also noticed it sounds to be struggling to keep pulling at WOT, something it had no trouble with before.

[Ric]

Well, I guess this isn't all that popular?

Anywho, a WOT high-rpm plug chop shows a need for bigger jets. Guess I'll be ordering a pair of 135s and O-rings.

[TxGSrider]

Does the problem happen if you do it with the choke on?

[Ric]

Honestly haven't thought to try that yet.

[Ric]

Just finished putting a pair of 135s in it and trimming the petcock vacuum hose(it was frayed and letting air into the right cylinder). Also raised the float level on the right to match the left. Will do a plug chop and report back.

It still cuts out like before still. For now I'm stumped on that.