Quote:
Originally Posted by saand
I guess the question is, has anyone driven a 2 cylinder engine that is a straight 2 and was it vibrating all over the place or smooth. If anyone can tell me it was smooth then this mod might be workable.
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I've driven an older Suzuki GS500 and newish BMW F800, both parallel twins.
The Zuki is rather rough, especially at lower rpm.
The F800 is smoother, because of the fake 3rd pistonrod acting as a balancer, but still not as smooth as a 4-inline.
(Didn't ride these : )
Another reasonably smooth parallel twin is the Kawasaki 650 (W650, ER-6 range).
With more vibes - could have been designed in or simply not ironed out - there's the Triumph 865cc (Bonneville Thruxton America Speedmaster).
So in m/c applications, the inline twin is a well-proven concept.