41mm stroke...

Anyone know of any mopeds with a 41mm stroke and 12mm wrist pin?

I found a rad kit that I really want to use on something, and will buy an engine if i need to.

Thanks.

Re: 41mm stroke...

Minarelli is 41, i believe.

Re: 41mm stroke...

V1s are 42, but that _might_ be close enough considering the amount of work its going to take to fit this to anything...thanks bret!

Re: 41mm stroke...

i believe motobecane engines have a 41mm stroke....manual i have says 1.64 inches...thats roughly 41mm

Re: 41mm stroke...

Motobecane is 39mm

Re: 41mm stroke...

it says bore: 1.53 stroke is 1.64

1.64 is 41mm

Re: 41mm stroke...

"manual":http://www.mopedriders.org/article_view.php?faq=2&fldAuto=18

breet let me know if i'm reading this wrong...scroll to the technical specs, but according to the conversion on 1.64 thats 41mm

Re: 41mm stroke...

Works out to 41.65mm by my calculator. I measured that for the stroke on my Moby tonight. See my Kit Proma post in the Performance tuning forum for details.

Using the bore and stroke above. It works out to 50.82cc displacement. Pretty close.

-Eric

Re: 41mm stroke...

i thought so...the stroke is indeed 41mm measured out mine when i got home last night from work

Re: 41mm stroke...

So what crazy kit is this you found? Give some details and/or photos please.

-Eric

Re: 41mm stroke...

Its a Pinasco 112cc kit made for Vespa 50cc geared scooters from the 70s. Found it at a swap meet on the CHEAP.

Re: 41mm stroke...

Looks like this, but used and dirty as hell....

<a href="http://photobucket.com"; target="_blank"><img src="http://i9.photobucket.com/albums/a80/bloodonthefuton/pinck4.jpg"; border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>

Re: 41mm stroke...

Man... I don't know.

Re: 41mm stroke...

woah man that's HUGE, even if you manage to swap topends that bore will bust up your bottom end something fierce.

Re: 41mm stroke...

wowza! that is one huge ass cylinder!

Re: 41mm stroke...

Yep. I'm not really worried about that. It's just a project that I will get to, blow up, then move on from. I've been toying with the idea for a while.

This just in,

PISTON PORT DERBI!!!!!!!

41 fucking millimeter stroke!!!

Hell yes!

Re: 41mm stroke...

sweet! it'da been dope on the moby too! but i'm guessing you already got a derbi...variated 102cc motobecane rigid woulda been fukkin banannas! but then again, so will the derbi

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