1975 750S --why can't Guzzi do 70 hp now?

[frans belgium]

having said that , it would be fun to try , as much power as the V7sport with 50 kilo less should be enough to annoy loads of big bikes on twisty roads

It doesn't need an upgrade for that.
In the twisties,  my son used to outrun me on his Nevada against my B11.
And that was in the days when I was still young enough to go fast and he was too young to outrun me on anything.

[John A]

What Cheese and John said  is what I think too: torque is what makes it fun. When I was on a Funny car team my boss told me that "if we're not breaking parts it's because we're not making enough power" so there is that. A guy should be able to twist out a clutch hub occasionaly ;D

[kevdog3019]

My 05 Nevada showed 38.30 hp and 35.82 tq stock and with head work, increased displacement, open intake and exhaust and a good dyno tune (with power commander) measures 51.23 hp and 50.20 tq.  I've only got about 1,500 miles on it since the engine work, but the clutch seems to be handling it with no problem.

Is this the one Milich did last year? 850cc?

[redrider]

The Café Sport hit 79 and change on a portable Dynojet. My friend's Griso added 10. My Norton hit 46. I personally feel there are two types of power. Real-at the crank and Real World-after all gearing changes as delivered to the drum.

[skromfols]

Is this the one Milich did last year? 850cc?

Yes. 

[Dogwalker]

Depending on where you look the Crank horsepower is 70-90 back in 1975.

The big block 750 have never developed 70 hp at the crank.
The real figure was of 52 hp at the rear wheel.
That can be translated (but without much sense, as the power at the rear wheel is what count) in 57/58 hp at the crank.

[Dogwalker]

Where does the Lario fit in? Small block sure, but better head performance.

51hp at the rear wheel for the Lario, 60 hp at the rear wheel for the V75 4V, all measured by the magazines of the era.

[kevdog3019]

Yes. 

Did you tell us about your experience with this bike yet?  I for one would love to hear about this bugger.  ;-T
Many others as well I'm certain.

[kevdog3019]

51hp at the rear wheel for the Lario, 60 hp at the rear wheel for the V75 4V, all measured by the magazines of the era.

Not measured by Milich 2 yrs ago. About 38 RWH.

[skromfols]

Did you tell us about your experience with this bike yet?  I for one would love to hear about this bugger.  ;-T
Many others as well I'm certain.

I have a disagreement with Ed Milich about the project and I would prefer to wait until it's settled before providing details about the experience and the outcome.  But there is no dispute about the power and torque increase.

[Dogwalker]

Not measured by Milich 2 yrs ago. About 38 RWH.

I understand your point, but on the bench of Milich had been measured some bike. On the Bench of Motociclismo and In Moto had been measured all the motorcycle production of the last 35 years (and more), and the data measured 30 years ago are consistent with those measured today, so, if I want to do a comparison, I have to use the benches of the magazines.

[kevdog3019]

I understand your point, but on the bench of Milich had been measured some bike. On the Bench of Motociclismo and In Moto had been measured all the motorcycle production of the last 35 years (and more), and the data measured 30 years ago are consistent with those measured today, so, if I want to do a comparison, I have to use the benches of the magazines.

Interesting perception.

[Chuck in Indiana]

Interesting perception.

Well, Ed's dyno reads low. When he dynoed your original motor I remember seeing the pix of the teardown. One valve was seriously burnt, and I'd be surprised if that cylinder had *any* compression. At any rate, no matter the number, you got a 15% increase.

[kevdog3019]

Well, Ed's dyno reads low. When he dynoed your original motor I remember seeing the pix of the teardown. One valve was seriously burnt, and I'd be surprised if that cylinder had *any* compression. At any rate, no matter the number, you got a 15% increase.

I'm not trusting any of those numbers Chuck. There were so many issues and attempts with the final dyno that we simply can't say what I ended up with,  The original 38 I can't vouch for. I doubt there was a leak down performed. I can only vouch for the difference between my stock Lario which has new valves and good compression and my hopped up job. BIG difference.