Not sure where that section is, as I'm a newbe, and and even if I wasn't not sure I would be posting in the right place. But I guess that's why I like riding Cats braaap, braaaap... Get some, "OTG" On The GasTM!!! Sorry just wanting some snow.
Stock 2017 & newer ZR9000 Turbo has 24/50 gearing. At recommended max engine RPM (8750-8800) the Cat gearing chart shows the sled will go 113.
If left stock, the Yamaha-designed and manufactured engine (998 cc 3-cylinder w turbo) are bullet-proof. In the 5 years this engine has been out, there have been very very few reports of engine failures.
Once a tune is installed, of course there is going to be more problems due to higher output and higher stress on internal parts. But even with a tune, they are very reliable. Big tip - NEVER NEVER turn the engine backwards!!