Can anyone help me here, i'm wondering if 80" jugs will fit onto a 74" engine with the 74" head, is it the same stroke as a 74", just looking to add a little more to it and get grab anew 80" setup cheapo????

Thanx

 

man I can't type today

 

Yes they will and of course you will have to match pistons to the new bore Now sometime down the road you should get a 43/4 stroker wheels and rods Now we have a 93CI stroker What an *** kicker this combo is !

 

they`ll fit fine,but you`ll have to run .060 74" pistons(3.5 bore).the 80" has a 4.25 stroke,so 80 pistons aint gunna work with a 74" lower end(unless you want about 5.0-1 compresion)
kirby
vee twin racing

 

I ran a 61 CI bottom end with 74 CI cyls on my knuck for 5 years and I was able to kickstart the bike with my arm ! (paying for that now ) Loooow compression Finally did an S&S 80 CI bottom end What a difference ! Did low compression pistons so I could still start it by hand But got too old and weak to use that arm starting method What a difference in power ! As I remember with the orig 61 bottom end with 74 cylinders at TDC the pistons were a 1/4 in from the top of the cylinders !