Go to the link below and you can download the patterns from Yamaha for free and make your own paper model of the XTZ850R & YZ450F, and other models.
https://global.yamaha-motor.com/showroom/papercraft/rally/
There are a number of other models available also, mostly road bikes.
https://global.yamaha-motor.com/showroom/papercraft/realistic/
and the New MT-10.
https://global.yamaha-motor.com/showroom/papercraft/ultra/mt-10/
They even provide guidelines on how to put them together.
https://global.yamaha-motor.com/showroom/papercraft/howto/
The detail is pretty impressive
I’ve downloaded the YZF-R1 (2007) files and looked at the assembly instructions. The detail is amazing for each assembly group. I reckon with allocating a couple of hours each evening it would take me* a couple of weeks to complete the build.
* I don’t have the steady hand of a surgeon and most definitely don’t have the required patience of a saint