I have replaced the carb boots. Sounds like it will need crank seals no matter. Will that impact low end performance?

Thank you

Recently purchased a 1983 Liquifire that had been in storage for 20+ years. 2700 miles and quite clean and original. I have the machine up and running after several hours of carb cleaning, new fuel pump, belt etc.. Ridden it a few times. The machine has poor low end performance, I feel it may be a c...