ORIGINAL: suitcase
I was actually looking for a bit more of a comparison, rather than opinions. The YS is in stock and costs a few dollars more than the Saito if I order it on line because I can buy the Saito for $319 +tax at the LHS. To order it from Horizon it's $339 + shipping. So, cost is close but power is greatest concern. I have a 110 on a 60 size mayhem but am concerned about it flying the Big Boy with the same authority. The mayhem weighs about the same as the big boy I think but has a smaller wing 72" compared to 80".
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Go to
www.centralhobbies.com and compare that YS 1.10 price to your lowest Saito 1.25 price. It is only a few dollars more.
I have both engines, by the way, and love them both. They are apples and oranges by comparison.