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Old 04-30-2013, 04:36 PM   #11
Buzglyd
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Originally Posted by The Spaceman View Post
I read about BMW's balance rod solution that JM referenced. It's clever, no doubt.

But why not have one piston hitting TDC while the other hits BDC? That's how my Vee's 90-degree twin achieved balance without weights or rods. HD throws both pistons up and down together on their Vee, which creates their unique engine "experience."

I reject the inline twin engine for it's inherent design failures! All manufacturers should immediately cease and desist their construction forthwith and replace them with V-4s!
Big difference between a V and an inline Kenneth.

Harleys pistons stagger just a little due to the single pin crank giving it the potato sound.

I think think an inline would shake side to side like crazy if they did what you suggested.
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Old 04-30-2013, 04:40 PM   #12
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Nice that they are putting decent bags on it too. Those gray expandables were almost as much of a joke as the KTM SMT stock cloth bags.
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Old 04-30-2013, 05:10 PM   #13
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Big difference between a V and an inline Kenneth.

Harleys pistons stagger just a little due to the single pin crank giving it the potato sound.

I think think an inline would shake side to side like crazy if they did what you suggested.
Sure there is, all the designs have their own characteristics, benefits, disadvantages, etc. I was just hoping someone had the specifics as to why this engine was designed this way vs other I twins.
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Old 04-30-2013, 05:49 PM   #14
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One thing to remember is these are physically small bikes, if you are um... "econmoy sized" you ain't gonna fit..

When I had my GS in for a service they gave me one as a loaner and I felt like a circus bear riding a tricycle on it, YMMV but buyer beware..
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Old 04-30-2013, 06:12 PM   #15
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Sure there is, all the designs have their own characteristics, benefits, disadvantages, etc. I was just hoping someone had the specifics as to why this engine was designed this way vs other I twins.
Most I twins have 360 degree cranks.

Some have 270s cuz they sound better.
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Old 04-30-2013, 06:29 PM   #16
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Looks like a nice "in scale" kind of bike. Would love to do the Edelweiss tour on one of these.
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Old 04-30-2013, 08:06 PM   #17
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Harleys pistons stagger just a little due to the single pin crank giving it the potato sound.
I thought the cylinders on Harley v-twins are kept in alignment by the "fork and knife" design of the connecting rods.
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Old 04-30-2013, 08:27 PM   #18
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I thought the cylinders on Harley v-twins are kept in alignment by the "fork and knife" design of the connecting rods.
That's correct. No motorcycle engines are really smooth without some compensation. The V-8 engines or any higher multiple of 4, like V-12 or V-16 are pretty smooth. The V-6 is especially lousy and is used for compactness reasons not performance. An I-6 has better torque characteristics. The V-8 is better in every way. Motorcycle engines, having usually 2-4 cylinders are inherently nasty vibrationwise. The I-4 is really bad for high frequencies as witness my old CB750F and others before counterbalancing shafts came into use. It was a horrible dental drill at certain engine speeds, worse than almost any twin. The bike simply could not be ridden for more than a few minutes at those speeds (65mph unfortunately). The Harley style crank is actually a pretty good compromise as twins go.
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Old 04-30-2013, 09:37 PM   #19
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I thought the cylinders on Harley v-twins are kept in alignment by the "fork and knife" design of the connecting rods.
Sorry, I was talking about the firing not the alignment.

The Jap "cruisers" have those mis-aligned cylinders.
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Old 05-01-2013, 07:26 AM   #20
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Originally Posted by sarnali2 View Post
One thing to remember is these are physically small bikes, if you are um... "econmoy sized" you ain't gonna fit..

When I had my GS in for a service they gave me one as a loaner and I felt like a circus bear riding a tricycle on it, YMMV but buyer beware..
When I was deciding on the CB I watched the Honda design team video, which has a segment with a former Japanese racer riding around on it. When I saw the bike In person the first time I was shocked at how small it was. I didn't realize the racer dude must be about 4' tall and 90 lbs. It's false advertising I tell you!
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