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12425 - Established June, 2013 - all GRiSO, all the time...
 
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 Piston & Conrod pics

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Pete Roper
beetle
waterbottle
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waterbottle
GRiSO Capo
GRiSO Capo
waterbottle


Posts : 1785
Join date : 2015-02-02
Age : 61

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PostSubject: Piston & Conrod pics   Piston & Conrod pics Icon_minitime1Thu Dec 24, 2015 8:27 pm

Just a couple of pics, I paid all this money for a GRiSO and only got half a piston Razz [You must be registered and logged in to see this image.]" />

Some fancy inserts on these
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Conrods have Spray ports to direct oil to underside of pistons. There is also a spray bar for each side too.
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beetle
GRiSO Capo
GRiSO Capo
beetle


Posts : 9537
Join date : 2013-09-30

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PostSubject: Re: Piston & Conrod pics   Piston & Conrod pics Icon_minitime1Thu Dec 24, 2015 8:44 pm

Ooh! Porn!

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Pete Roper
GRiSO Capo
GRiSO Capo
Pete Roper


Posts : 9468
Join date : 2013-05-29
Age : 65

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PostSubject: Re: Piston & Conrod pics   Piston & Conrod pics Icon_minitime1Thu Dec 24, 2015 8:46 pm

The odd thing is Ron you'll find that the shells don't have feed holes for the rod jets.

Pete
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waterbottle
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waterbottle


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PostSubject: Re: Piston & Conrod pics   Piston & Conrod pics Icon_minitime1Thu Dec 24, 2015 8:57 pm

Oh, disappointed now. Another leftover from the research and development dept ?  Mayhap they had trouble with the oil pressure and went to the spray bars then ? Anyhoo it works Thumbs Up
Cylinder walls show zero appreciable wear after 36Thousand kms , just a slight build up of a soft brown carbon
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rboe
Tiradritto
Tiradritto
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Posts : 329
Join date : 2014-04-21

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PostSubject: Re: Piston & Conrod pics   Piston & Conrod pics Icon_minitime1Thu Dec 24, 2015 9:13 pm

Why does the piston have those arch segment cutouts on top along the edge?
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Pete Roper
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Pete Roper


Posts : 9468
Join date : 2013-05-29
Age : 65

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PostSubject: Re: Piston & Conrod pics   Piston & Conrod pics Icon_minitime1Thu Dec 24, 2015 9:45 pm

I'd imagine they removed the material to avoids a potential hot spot.

Pete
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Grisonut
GRiSO
GRiSO
Grisonut


Posts : 1398
Join date : 2014-01-02

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PostSubject: Re: Piston & Conrod pics   Piston & Conrod pics Icon_minitime1Thu Dec 24, 2015 11:03 pm

I think I agree with Pete...
The 8V is a sweet heart of a mill.
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Mad Welshman
Don Abbondio
Don Abbondio
Mad Welshman


Posts : 12
Join date : 2015-08-10

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PostSubject: Re: Piston & Conrod pics   Piston & Conrod pics Icon_minitime1Mon Jan 04, 2016 2:26 pm

I like em slim ;-)
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Oz1200Guzzi
Don Abbondio
Don Abbondio
Oz1200Guzzi


Posts : 6019
Join date : 2014-03-13
Age : 68

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PostSubject: Re: Piston & Conrod pics   Piston & Conrod pics Icon_minitime1Mon Jan 04, 2016 2:40 pm

Reminds me of the pistons in the BSA works Moto-X bikes I had - a minimalist approach (though these were hi domed units with valve cutaways). That particular bike had a maximum RPM of around 7,000 and all of 40 HP, valve overlap was so great you could look through the engine from the exhaust port and out through the inlet port. Ran like shit if you didn't have the right exhaust (no muffler - just a Reverse Cone Megaphone on a short pipe). Brings back memories...
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