Shared crankpin v-twin engines

[centaurus]

Hi guys,

I was wondering if there is anybody around with enough encyclopaedic knowledge to answer the following question:

Does any of the well known motorcycle manufacturers (except HD and indian) manufacture/have manufactured V-twin engines with shared crankpin and less than 90 deg. angle between cylinders?

[jim.cox]

The old 350 and 500 moto morini?

Did the Hionda CX have a shared pin?

[Ixion]

Yamaha XV250, def. maybe 750/100, I'd have to look . XV250 is a side-by-side though not a knife-and-fork.

[avgas]

Isn't the aprilla rotax a 60 deg?

[bogan]

Did the Hionda CX have a shared pin?

yip, hulking great shaft drive NS engine though, saying that they did turbo some of them

[Warr]

VFR's share, but are a V4

[PeeJay]

Probably better to ask what vtwin doesnt have a shared crankpin

[avgas]

You want a Lancia V6 you do. But I suppose would be hard to get one from 1950's anyone got one lying around?

[centaurus]

Probably better to ask what vtwin doesnt have a shared crankpin

I'm looking for the uneven "harley beat" and I've noticed that most of the japanese cruisers, even the ones with less than 90 deg. angle sound very even, which means each cylinder has its own crankpin.

[Jerry74]

What about the Victory ???

[avgas]

I'm looking for the uneven "harley beat" and I've noticed that most of the japanese cruisers, even the ones with less than 90 deg. angle sound very even, which means each cylinder has its own crankpin.

Errr hope this helps you - apparently its like this

• A piston fires.
• The next piston fires at 315 degrees.
• There is a 405-degree gap.
• A piston fires.
• The next piston fires at 315 degrees.
• There is a 405-degree gap.

So just remove spark plug 2 and 4 from your bike and fuck with the timing.

[Jerry74]

Or buy a potato potato potato potato HD and you will be sweet

[bogan]

Errr hope this helps you - apparently its like this

• A piston fires.
• The next piston fires at 315 degrees.
• There is a 405-degree gap.
• A piston fires.
• The next piston fires at 315 degrees.
• There is a 405-degree gap.

So just remove spark plug 2 and 4 from your bike and fuck with the timing.

even better idea, just big bang firing order it; you'll need new camshafts and to fuck with the timing but you'll get 2 bangs, 180 degrees, 2 more bangs, then 540 degrees then repeats.

[watermellon]

Not a motorcycle, but I think the Bugatti Veyron engine (a work of art) also has a shared crankpin design. The comparison with my HD starts and finishes there... :-(

[rwh]

Does any of the well known motorcycle manufacturers (except HD and indian) manufacture/have manufactured V-twin engines with shared crankpin and less than 90 deg. angle between cylinders?

Britten

53 degrees IIRC.

Richard