The bike I am building is not the gray scramble looking thing that folks have been posting.......I am building a Blue Collar Bobber Cafe' kit. I am not using their large front tire, front fender, bottom mount headlight or the overly large speedo assembly - and I am not sure what I am going to do about paint yet. It looks like this if you use everything in the kit.
No, hopping up the little Ninja motor shortens the engine life considerably....30 HP out of a 250cc engine is about all you can coax out and still get durability. Left stock they can go a long time - one Ninja forum member got 87,000 miles on his first motor before the cam chain just got too long.....and it was cheaper and easier to just buy a good used motor than rebuild his high mileage engine. The stock motor can push the little Ninja down the highway at 80 mph easily, and can get close to 80 mpg if you ride at normal speeds......it is best to accept the motor for what it is and just ride it.
Over the weekend I was able to push the new bearings in the powder coated swingarm, mount the new shock, get the back wheel on, install the side panels, and I got the headlight mounts on, and made turn signal mounts. I also drained the fork oil and put new oil in.......the Factory Shop Manual says to use 10W-20 motor oil - but I could not find that so I used 5W-20....if that doesn't work well it is easy to change as the forks do have drain plugs.
The bike is somewhat hard to photograph in the garage with a cell phone....there is a lot of black.