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I've never ridden a solid-mount Sportster; I'd love to see what the vibration feels like on those - I hear it's bad, but won't know till I ride one.Lannis
The iron head Sportster I owned vibrated worse than a Triumph. I had a modified A10 and it was fairly smooth at 60 mph as compared to other vertical twins... Lannis, the vibration thread is in the Triumph forum on Brit Bike
Never spent much time on a Triumph twin but always assumed they vibrated like a non isolastic Norton or BSA twin. Those would rattle your fillings out compared to any Guzzi twin I have ever rode.Pete
1. If you're into the engine, have the builder balance the crank, dynamically, and balance the pistons.2. If there are two carbs, sync them well.3. Install an electronic ignition where the timing relationship between the two cylinders is established by the location of the triggers on the backing plate, NOT by trying to set two sets of points so they fire at the right times, which can't be done unless you set the dwell wrong on one of them.These things make a BIG difference!LannisThe later point plates(1968 on I think) with the condensers mounted under the fuel tank allow the dwell to be set on each set of points. I think it was with the change from monobloc to concentric carburetors.
My T140 is pretty good at 50, not too much vibration, I could ride at that speed for hours. At 60 it's bothersome at a steady pace. My '85 Guzzi vibrates in a much less intense way. I haven't ridden a 70's guzzi so I can't compare directly but...I would rather ride my Guzzi through the Vermont/New Hamphshire mountains than the Triumph on a long trip.I would rather ride the Triumph on the dirt roads and hills of the Finger Lakes.We'll see how Tony's new Triumph compares to my T140 shake-wise and to the Guzzi this spring And I love how both bikes sound too!!
So...some of you here have running and licensed old Triumphs, BSA's or other vertical twin twin bikes...I have several including my race bike..... There's a discussion on a popular vintage Triumph forum about vibration....Some guys saying how smooth their 650/750 Triumphs are on the highway...... In fact when I said a 1000 Guzzi is far smoother on the highway than any old Triumph a few told me something is wrong with my Triumph....Must be unbalanced or have loose bolts.They rode a Guzzi and it vibrated more than the Triumph at highway speeds.....I was laughing inside knowing that 40 years of Triumphs taught me something... What do you say from actual recent riding experience ? Prefer a 650 Triumph to a Guzzi on a road trip because it's smoother?
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