I’m new on here so hello, I’m trying to find parts for my 2006 sand viper 650 and not having any luck does anyone know if the Joyner 650 sand spider and sand viper 650 have same motors?

Motors and transmissions are the same. Suspension and half-shafts are different. Goka, Roketa, BMS and Dazon 650's are also engine part sources. SOHC 800 and 1000 engines also share some external parts with the 650...

I need a starter, distributor, and brake master cylinder, so I can buy for the spider and they will match up?
I’m also curious how to put a Honda Civic motor transmission into 800-1100 viper frame.

The Sand Spider is narrower than the Sand Viper. A 3-cylinder fits well, but a 4-cylinder requires a shoe horn and widening the rear track to give you any wheel travel.