The ergo seat looks identical to the Vitpilen seat except for the holes in the cover. I find the Vitpilen seat super comfortable, I put a couple hundred miles on it in one day before.
Oof. That is a ton of torque on those two bolts into the frame. If I weld up something like that I would make the frame extend under the tail to use all four bolts.
Did they put a wideband in your exhaust during the dyno run? If you have an open airbox and a full exhaust I would be surprised if the fuel-x lite is sufficient. But going with more ecu control is really more about safety than anything else, you can make quite a bit of power running lean. 40...
That looks a lot better than the one that is called for on our bikes, the lip is more than twice as high as what you show. Have to order that up this weekend.
I don't have a 2023 401 either, but it literally took 10 seconds of google to get the answer you are looking for. Left side of the bike, up front under the tank.
'2023 svartpilen 401 seat removal key location' typed in a google window.
There are no bolts to remove the seat, you use the key and lift up the back.
You don't have instructions for mounting the luggage rack that you purchased.?