RE: YS 63FZ or OS FS-70 Ultimate for Kyosho Majestic?
I had a Majestic with a YS 63 in it. I ran 13 x 6 or 12 x 7 on 20% fuel. It was very good. It wasnt as fast as some 2 stoke setups but the YS just kept pulling. This was the last engine change. I had a SC 46, os 46fx, SC 61 and finally the YS. The YS was without doubt the best combination.
Kris