'06 GZ freeway driving problems

[GZ250]

i do not feel any difference in speed (power) when i use 93 or 87 except that with 93 its more smooth. i recently had the valves adjusted and i felt a huge difference in power. i was not able to touch 70mph, now i have to keep it down. so use carb cleaner, change the spark plug if its old (even one year is old enough and its not expensive) or clean it. Air filter in 06 could be old if that was not changed. Things that I did recently and made a difference. Valve adjustment and using Rotella T motor oil (full synthetic) in blue jug. Gives power and smoothness.

One thing that should be taken as Rule of Thumb by everyone who buys a used vehicle. Change the obvious things that matter the most if they were not already changed by the first owner recently. filters, oils, brakes and get a tune up. it gives peace of mind and life to your machine.