Comments on: Wakan 1640 – New French V-Twin Motorcycle

By: hh

hh — Wed, 25 Mar 2009 21:28:58 +0000

Frank still doesn’t get it, even after “correcting” himself. If his theory of power pulse cancellation were true, the 60 degree v-twin would have worse cancellation than the 45. But of course, it’s complete BS. The power pulses don’t even come close to being at the same time, but they are slightly closer in any v-twin than in a parallel twin. The bigger the angle, the closer the power pulses are to eachother. It’s true that a 72 degree v-twin provides the perfect distribution of linear momentum of the pistons. One is reversing direction while the other is at highest linear velocity. The parallel twin is the worst where both pistons reverse direction at the same time, which results in its inherent vibration, especially at displacements over 500 cc. This is why some have fitted 72 degree cranks to their British twins.

By: Andy J

Andy J — Fri, 02 Jan 2009 05:04:29 +0000

All of you who think that the Jap and china bikes are faster on the zero to sixty times, your wrong. V motors have much more torque, as proven in above posts. And whoever thinks V motors are so much hevier, your wrong as well. Look at the Ducati desmosedici rr. It is a V-4, pushing out over 200hp. Might i say it is 989cc motor. Dry weight is under 380. and that is no lie. When i visited a ducati dealer in a city near me, we tested everything on the scale and dyno. came out to 379 lbs, dry. Put out 205hp. Ducati’s have the best power to weight ratio v motors on the market. And you can rev them up to 14,000rpm. Not bad for v twins. Desmosedici zero to sixty time is 2.8 seconds. This is the ultimate street bike. They only made 1500 of them. all are sold and they went for a mere $74,338.00

By: david

david — Thu, 25 Sep 2008 03:47:57 +0000

Any of you ever heard of NHRA drag racing.Thats where the real hp is. Looks to me like Buells and the HD dominate over the only 4 cylinder Suzuki’s to even contend. The v twins kill em off the line with killer torque. Remember this is major drag racing and they will use what is best for the application.Results look pretty clear to me.

By: motorjunkie

motorjunkie — Thu, 17 Jul 2008 14:18:01 +0000

It’s really simple,HEAVY SPINNING MASS IS HARD TO STOP,HEAVY SPINNING MASS IS HARD TO SPIN FAST. That’s why 45 degree single pin crank motors have tons of torque from off idle up to around 2000 to 2500 rpm and then start dropping off,as opposed to other configurations that gain torque or at least are more linear. If you like the bicycle comparison ,cut one of your pedals off and weld it 45 deg. from the opposite then go for a ride. Personally I think the crankshaft configuration comes into play more than the cylinder spacing.It all comes down to what a person likes. I’m kinda partial to v-4s.The potato potato is what a lot of people like and most for the wrong reason,they associate the cadence to something like a cammed-out big block which couldn’t be further from the truth. Actually it comes closer to your washing machine when all those heavy wet clothes get slung over to one side during the spin cycle.Not being critical it’s just not for everyone.

By: tom clasenheimer

tom clasenheimer — Sat, 12 Jul 2008 06:30:11 +0000

Why any clever individual would waste so much time on a decrepid design without addressing the essential valve train flaws only demonstrates how little enginuity is willingly indulged by so many for so long and to so little avail.