Best 90 motor

[TerryBelanger]

Let it fly. Think about peicing a 90 machine together. Probably the Extreme. What 90 motors you guys like and why?

[conrod]

I put a Viperhead on my ys91 this weekend and it was pretty much unstopable!
The YS has been using a pressurized system for many years that is proven.
You don't use exhaust pressure (which eats up main tank fuel line quick)
PLUG and PLAY with muffler and 25-30% nitro
Needles Work and are easy to adjust
Doesn't require much adjustment..ie...set it and forget it unless temp swings are drastic
Just kick's ass nothing more to say.

[Buzzin Brian]

I agree. For me it is YS all the way! :smokin:

[capebob]

Go to this thread: http://www.helifreak.com/viewtopic.php?t=823

Bob