Yes.

What crankshaft do you want to use? What size cylinders? What size engine do you want to build? Many combinations; All matter.

MikeV

Dear Paul Carlo and MikeiV thsnk for replying.
I have a 750 ss cranckshaft, so 61,5 of stroke. I now I get alternative but this is what I have at home.
And I would like to find pistons realized or shaped for that kind of head without spending time to do a model to show to workshop.


Try to reply to Carlo's without translating Carlo's reply.
I prefer to find only two pistons and not buy a set of four, of course I know 12. compression rate is to much and I belive even my technician know.
Ok I will drop the front fork to reach 70/71 cm from wheel axle.



I cut the lower part of the seat because i was sure to prefer this alternative , once in place i realize i dfinitely do not like this anfd then i will glue agaain the cutted parts, adding modification in shape and on the right side i have to deal with the braking pump, but i found in internet same helpfull pics
Filippo

Filippo, you can get 650 hi compression pistons that can be machined to give you what you want, if you are using 88 mm cylinders you can get pistons as well.
82mm pistons as well as the 88 are made by Pistal.
The 82mm pistons were custom designed by a guy in the USA, I don’t think you can get them directly from Pistal here is the part number
Good luck! Paul

Thank you Paul
I forget to specify the pistons dimension
i would like to install 88 mm pistons to get 748 capacity
thank for suggestion i will check.
Filippo

And Ferracci sells three sets that will work with the 61.5mm crank. Two are 88mm and one is 90mm. One is for dual plugs. MikeV

https://www.ferracci.com/collections/pistons

Thank you MikeV

And here is another possibility. 88 and 90mm. Looks like for F1 combustion chamber - round. MikeV

https://www.ebay.com/itm/324355063487

in this group nothing is impossible, I think you can also find spare parts for the Batman car here!!

And for the Deathmobile from the movie Animal House. Right here in little Cottage Grove, Oregon. MikeV

I told you so!!!