it is pistons
Stock crank and 90.5 instead of 85.5
82s would make 1835
94 pistons would make a 1916
So - basically "all" that is needed is cutting the case and opening the heads to accept larger barrels.
They all work on stock cranks. it is after that that the strokers come in to play
The other part is if you want to make the HP that goes with it.
cam, head work, exhaust, etc etc
have a look here
http://www.aircooled.net/gnrlsite/resource/articles.htm
and have a browse through a few of the articles.
Bizarre ·