66HP at rear wheel

[gpacs]

It has nothing to do with who wins races.
It's about being accountable.

Red's claim is an utter untruth from the mouth of someone who is held in high esteem and knows better.
He comprehends more than most that what he claims is a total fabrication, an impossibility. Anyone on the forum with even a modicum of experience with engines recognised that instantly. It was a comment driven by hubris for the sake of making a post.
Red remains silent and immutable because to do otherwise would prove the grossly exaggerated claim can't be defended or substantiated.
It is actually a sad indictment for the integrity of the forum that the knowledgeable people who know why this is the case have also remained silent.

Forum Members deserve more respect than that.

Truly, I think the point has been made and laboured over long enough.

 

[Dellortoman]

Leak down tests are a great diagnostic tool as long as you understand the principles of them and how to use them correctly. Have seen a lot of qualified technicians not use them correctly, let along do a compression test the correct way. 

https://mobiloil.com/en/article/car-maintenance/car-maintenance-archive/how-to-do-a-leakdown-test

A leak down test can be useful if you know what the reading on the gauge means. But nobody does. To illustrate my point, consider this sentence from the link (above) that Brett posted about how to do a leak down test:

"One gauge on the tester measures the pressure of the air entering the cylinder and the other measures the percentage of the air escaping (or leaking) from the cylinder. The loss percentage will indicate the condition of the cylinder and overall condition of the engine."

Think about that for a minute. They're saying that air is continuously being pumped into the cylinder, but only a certain percentage of that air is leaking out. What a complete load of bollocks!

Presuming the system is in a steady flow state (as indicated by the constant pressure shown on the delivery pressure gauge) and if only some of the air that's going in is leaking out, where's the rest of the air going?  If it's staying in the cylinder, then sooner or later all of the earth's atmosphere will end up in the cylinder.  OK, I know that's taking the concept to an extreme, but I do it to illustrate the absurdity of the claim.

If the guys who write books on how to use a leak down tester don't have a clue, then how are we mortals supposed to know how to make sense of the results?

Well, having spent half of my life working with fluid mechanics, doing pressure, flow and leakage tests of air, water and other fluids, I can tell you. But to go into any detail would make a long winded post. I'm happy to do that if anybody wants further info. But perhaps this thread isn't the place to go into it, and I don't have time right now.

Suffice to say that the percentage scale on the gauge is very misleading. I'd go as far as to say it's meaningless in any engineering sense.

 

[Dellortoman]

FFS Greg - do you need to keep putting ads up for things you mention in posts?

I think it's perfectly OK for Greg to be posting links to items in his inventory, especially since the stuff he's indicating is relevant to the topic being discussed.

His general stock of parts and tools is very much Laverda related. I appreciate him letting us know that he can provide much the gear we need to keep our bikes going. I had no idea his stock was as comprehensive as it is before he started posting links.

Greg's business is a lot more relevant to Laverda ownership than your business of selling million dollar gin palaces.

Lighten up Yogi 

 

[cbertozz]

I agree Cam. I?m grateful for the fact that we have two passionate experts that help us to keep our bikes on the road.

 

[laverdatriple]

Hello,

just seen this conversation. I had modified my Jota 120 a little bit.

The engine is fresh reworked (Thx Piet). I?m still running-in the engine. But the carbs needed a setup.
So I went last summer for a setup on a dyno. You con see the result below.The red line is the final one.

More than 90HP at the rear wheel and nearly 95Nm.
Not so bad, I think.

 

[cbertozz]

That?s great.

Where is the battery hiding?

 

[laverdatriple]

At the triangle above the swingarm.
It?s covered with the aluminium plate.
I use a very small lithium iron disulphide.

Regards
Peter

 

[Lee87H]

Very nice power curve,that's what I feel when I ride may Lav, although with less power