Is a Honda crf90 real

No. Negative. There is an 80, an 85, and even a 100, but no 90. I work at a Honda dealership and had a gentleman call just this afternoon asking about parts for his "Honda 90." I kept asking if he meant the TRX90 (common youth ATV), but he insisted it only had 2 wheels, and that it also wasn't one of the old school ATC90 3 wheelers.

It had factory Honda plastics on it, and looked just like a Honda motor from a glance. However, it was nothing more than a Chinese knockoff with Honda Plastics on it. The motor did not have Honda's brand on it. Also, the VIN number he gave matched none of Honda's records.

If someone claims to have a Honda CRF90, they either have a Chinese knockoff, or they have bored the cylinder on a CRF70, 80, or 85. It is a common upgrade to bore out the CRF70 to a 90cc. This is especially common among people who use this as a pit bike.