Product says it will work with 06 Ninja 650R, but in reality it doesn't. The base for this cap is 3/8 inch too big for the original sized cap base. I now have a gap between my tank and the base for this cap, and a half inch gap between my tank reservoir and the rubber "plug" for the gas cap. Just going to buy a rubber gasket, and adhere it to the one existing on the product to make a good seal. Just disappointed.
I got this for my 2015 Ninja 1000. I got the black with gold kanji lettering. Before installing, I checked exactly what the kanji characters said. Big surprise, it says "ninja." So, now that I know it doesn't say anything I disagree with, I install it on my beautiful ride, quite easily. It sticks well if you follow the directions and heat up your tank surface, and it looks great.
Bought for my 13 R1, Great product. The bolts they provide are 5mmx25 and they should really be 5mmx30. Its a 50 cent fix from lowes. However the ones they provide will work with some weight on the gasket. The cap comes with a built in gasket so there is no need for the stock gasket. No venting problems. Glad I ignored the other review.