I am finishing up my SIG Kavalier and wanted to fit it with a four stroke. It asks for about a .40 size 2 stroke but I know that allot of people have used .46 size 2 strokes. I would be happier with the extra power and wanted feedback on a 4 stroke that would be suitable.

A few people at my club have saito's and will not recommend them due to various quality issues. What would be about the biggest 4 stroke I could use?

I would reccomend this YS .63s http://www2.towerhobbies.com/cgi-bin...&I=LXGTG7&P=ML if you arent worried about the price. The guys at our field were just talkin about Saitos being good. If you go with a saito I would get the Saito .72 if you want that much power.

Saito 72

OS 70 Surpass

YS 63

Yep. YS 63, OS 70 Surpass, Saito 72 (in that order in my opinion).
Dennis-

Yup I agree with these guys and Magnums are good too, Actually the Magnum 70 is on sale for $149 right now too http://www.hobbypeople.net/gallery/210945.asp I have a Magnum 91 and it's a great engine.

Dauntae

A O.S FS 52 surpass or a Saito FA 56 will
also work fine on that plane. The sig kavalier is not
a very heavy plane compared to similar planes
of different brands.

I would recommend against the YS. they are great engines, but also a little tougher to set up. go with a reliable, cheap 4 stroke for the first go around.

I have a bunch of Saito's. Never had any problems with any of them. I would reccomend a 56 or a 72. The 72 is if you want a bit of excess power. The 56 would fly it fine. I also advise against the YS. They are a great engine. But can be a bit difficult to set up. Once set they are fine. I do not know about Magnums, never had one. I would also say the OS would be fine. But I still say that Saito is the best first 4 stroker you can get. Good luck with whichever one you end up with.

Mark Shuman