V-twin (Guzzi) vs Flat-twin (BMW)

[Triple Jim]

Wait,  I can think of one possible exception and the is the KTM RC8.  I never got to rev it but it was salty on the bottom and mid.  So I guess that demonstrates your point Jim.  I'd forgotten about that one.

I don't doubt your experiences at all.  I'm just saying that the torque curve is the way it is by design, and has less to do with the number of cylinders in the engine than popular belief would say.

[Nic in Western NYS]

Riding twins vs 4 cyl bikes, I've found the torque curve to be broader on 4 cyl engines.

I know that runs counter to what most people believe.  My 4 cyl Suzuki can idle off clutch and pull solidly to 11k rpms and pick up power 4k when the jets kick in.

Twins seem to be more limited in torque range.  Cruisers have low end power and top out at 5k.  Guzzi seem to kick in at 4k-6k.  Duc seem to get "snatchy" unless revved.

Suzuki's 1157 4 cylinder is a beast.  It was my second bike and it spoiled me forever regarding having both low end pull and high end punch.  "Snatchy" is a good way to say it for the Duc when the rpm are too low "chk chk chk chk"

[kirby1923]

The more the cylinders the smoother the delivery, but the amount of torque is all about the design, BMEP and very inportant stroke and bore to stroke ratio...( over simplified for sure but one sentance discription..sorta)

:-)

[Tom]

NC Steve,
 
Surprised no-ones mentioned a certain 120* twin with
offset pins that runs dead smooth, won races for 20 yrs
And yet has never been used on the road????

Maurie.

https://www.youtube.com/watch?v=qfaXEk2nXGc

[Chuck in Indiana]

Be still, my beating heart.. 

[rboe]

 :1:

[RANDM]

https://www.youtube.com/watch?v=qfaXEk2nXGc

There you go!
I have two recurring barnfind phantasies - a bicylindrica and
a Rudge 4 valve.
Saw a Rudge motor once - unfortunately not in a barn but
lovingly stashed under a bench all wrapped up in oily rags
sitting next to a similarly treated JAP 1000.
Never assume a pile of oily rags is just a pile of oily rags.

[Tom]

They could probably sell rides on it.     I'd pay for one demo ride.  $20 maybe.    The Bicilindrica that is.

[AH Fan]

Just got in from a spirited run on a 4 valve.............. god those Guzzi engines move me.
I've owned and ridden the Japanese fours the Bmws........... sold them all eventually........ not sure what it is ,but I have found my machine.

Stinson out...........

[Chuck in Indiana]

Just got in from a spirited run on a 4 valve.............. god those Guzzi engines move me.
I've owned and ridden the Japanese fours the Bmws........... sold them all eventually........ not sure what it is ,but I have found my machine.

Stinson out...........

Me, too..

[JJ]

Me, too..

Me three!  The OHC 4V motor has certainly captured my attention!  :1: