Ressurection of an '89

[MARider]

That would cause you to be essentially running on one carb. I would replace the spring remove the fuel filter and see if that helps. I was running a identical filter and my bike was fine for a bit then after a while was having similar symptoms to yours. After removing the fuel filter I have not experienced it since (well except for one time I was a dummy and forgot to stop and get gas)

[yamahonkawazuki]

You wont have a problem getting rid of those clip-ons!! 
Go with sonic or progressive spring. Get rid of the fuel filter. Change all fluids and put on new tires. Check the tank for rust. If you feel up to it clean the carbs and put in larger jets while you have them open. All of that will really freshen up that bike.

the 89 clipons as stated, ARE and always will be the holy grail of parts

Not to an 80+ year old rider yami, I have stock bars with risers.   

you and me both jack. Never could get into the hunched over riding position