u/OkEmployer3202

Im in texas i found a used 2025 zx4rr with 3k miles clean also has a yoshi slip on dude is selling it for $8k. Should i get this?

I cant find many videos of flybys. I wanna hear how the bike sounds from far away. Does anyone have videos, please also include what slip on you have or which full system if you have.

I’m currently riding a 2021 Z400 (ninja 400 naked) and I’m looking to upgrade to the 2025 ZX-4RR. I love the idea of the small-displacement screamer, but I’m trying to wrap my head around the logistics and cost of actually making it "fast."

From what I’ve gathered, I’ll need a full exhaust and an ECU flash immediately to get past the US restrictions. For those who have done it:

1. Did you pull your ECU and mail it off or is a local dyno tune necessary?
2. What was your total "out the door" cost for the exhaust and the flash?

I’m starting to wonder if the total cost of the ZX4RR + mods is going to put me so close to ZX-6R territory that I should just get the 636, throw a slip-on on it, and call it a day. Would love to hear from anyone who has any insight. Thanks