Why is my motorcycle not producing the power that it should?

my 1985 Honda Magna v30 runs fine(sounds normal) but I have a hard time reving it above 9,000rpm with full throttle which it should hit red line at 11,500rpm… I am cleaning the carbs currently. Some times it has a hard time starting-eventhough I can hear it combusting. It should be able to hit 110mph with ease but it has a hard time getting to 55mph right now.
I have already ordered
-new air filter (it was thick black in the inside)
-oil filter
-?(this part is for you to answer)
what should I get, repair, clean, or inspect

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