I am not sure how to send link to this craigslist add but this guy has 14 350x engines all are in working conditions the cost was 400-1500 the more expensive ones have upgraded pistons cams head work until I can figure out how to do this job st look up Phoenix craigslist under atv and you will find it. Also while I am thinking of it there is a guy down the road from me that has a ton of 250 r stuff and 350x tons of complete trikes and parts I can get you his number just message me thx. I don't have either of these trikes just thought it might help