I am talking about just the block only... No side cover or internals... The new Honda blocks are very nice... Extra ribbing, supports, and built up in a few places... Really,nice pieces!!!
Because clone and predator parts are cheap and easy to find...
A Predator crank for $20.00 and a extra 40mm stroke for free...
I have broke Honda cranks and billet cranks... So for $20 bucks I will use a predator crank... A 2.756 piston with rings for $20.00 sure why not...
If going that route you want a billet rod and flywheel anyway... So get one to fit whatever predator crank you have...
You can build a good 20hp motor for not all that much if you shop,around...
Search the Internet they have Honda blocks on special all the time...
One place that is a bit more $$$ but has sales and free shipping sometimes is
Motorcycle, Snowmobile, and ATV Parts & Accessories. Part#12000-Z4V-406 CYLINDER ASSY.
I will have to check my home computer to find the cheaper place...