Certain engine configurations are inherently balanced, others are not. An I4, for example, is not balanced and most designs have balance shafts driven at twice crankshaft speed to quell them. V8s and I6s are perfectly balanced as-is and need nothing else to make them smooth. A 90-degree V-twin (like Ducati's engines) has perfect primary balance, but have a slight secondary imbalance due to the fact the rods are next to each other rather than in the same plane. The 90-degree V-twin is as close to perfect balance that there is, however, in a twin cylinder configuration.Anyone had experience with the engine in the SS regarding vibration when loaded up? Reason I ask, my current ride is an I4 and is real smooth. Today on a ride the battery crapped itself (6 year old so that's what I get for pushing my luck) so I had to get a lift home 2 up to pick up the trailer etc. Rode on the back of a V twin KTM 1190 Adventurer. Man what a shock, no doubt the thing can pull like a tractor, but the massive engine vibs also made it feel like one.
Every time the throttle was rolled on that big V twin just thumped through the whole bike and would nearly rattle the fillings in you teeth out. I just couldn't own something like that. So that has me wondering what the V twin in the Duc is going to be like.
Anyone got any experience or thoughts.
The KTM V-twin, at 75 degrees, is not as smooth as a Ducati. In addition, it's a large twin at 1190cc, so any imbalance is amplified. There is also the fact that twins don't have as many firing pulses per revolution, so, from that standpoint fours will feel smoother to you. I say ride a Ducati and decide for yourself what is acceptable.