ORIGINAL: carrellh
Kangke sells SK and JBA two stroke engines. Both brands are available in a 90/91 size, priced around $100.
http://www.kangkeusa.com/indexo.htm
I have read positive comments about SK but I do not think I've ever seen one.
The SKs have been very good engines for me but I have only used the .91s so know nothing about any of the others they make. Not a high RPM engine but designed for torque and to throw a bigger prop. I have never seen or used one of there JBAs so?????????? When I have a choice I go four stroke though and have a couple of the OS .91s and love them. I also like pumpers but my .91s aren't pumped, no big deal, they run great as long as I do my part. I have found the YS 1.10s for as low as $325.00 though so you know what my first choice would be.