I have flown mine with a Saito 72. Great combo. Very light and has good power.

That said, I would rather have a Saito 100, OS 91, or a YS 90.

Weight gain would be very slight. Power and WOW factor would be a bunch.

I like the 72. It does a great job. But a Bipe needs power +++++.

Of course if you just like to fly casual, stay with a smaller motor.

tonyc