Mine is a 1994 K75.
After doing a bunch of work to the bike it now rides well. I still haven't registered it so haven't tested it on the open road. Just up to 35mph on a circular driveway.
It's super smooth. It pulls very strong surprisingly. Has grunt and low end torque.
For the first several months there was a lag or the engine felt like it was choking when opening the throttle.
But after cleaning the injectors and adding some fuel treatment, it pulls great.
It's smoother than the boxers for sure. No surprise there.
This thing starts up immediately. Amazing for a 30 year old bike with nearly 70k miles.
It has sat around a lot, which is worse than the actual age and usage.
All the stock components seem to work. Although I did have to replace the cooling fan, temp/fan relay and I replaced the missing bulb monitoring relay.
Otherwise seems great. The injectors look in rough condition but engine performs well so will leave them as is.
I will say that this might be the best motorcycle support site Ive ever used. So much info here for just about anything brick related.
Thanks