I just bought this bike and noticed this. Please swipe for more pics!

Previous owner didn't ride the bike as much and didn't do any maintenance (he had it for 600 miles before I bought it off of him.) Should I bleed the brakes out at this point? Fluid's not dark but people have said to bleed it every 2 years.

Co worker sold me this zzr for 2500 good deal or nah ?

I have a 2023 ZX6R ABS with a LeoVince lv 10 slip on and stock air filter. I’m considering an ECU flash, aftermarket air filter, and eventually a full exhaust system.

For people who have done these mods on a 2019–2023 ZX-6R, was the difference actually noticeable on the street? I’m mainly interested in:
•throttle response and smoothness
•midrange/top-end power
• how much power you realistically gained
• whether a full system was worth the cost over just a slip on + flash
• reliability or drivability issues afterward

I’m planning to keep the bike for a while, so I’m more interested in a good long term setup than just making it louder. If you got a flash who flashed it? Im considering moore mafia

Help pls

What is the real difference in reliability between these two motorcycles, especially in terms of the engine, and how long they last over time, and what is the risk of fatal breakdowns?

I’m looking for an exhaust other than these bulky slip ons that are wrapped in that fake carbon fiber I personally think it looks tacky any recommendations are appreciated