I have 2 of Cheez kits kits.
My first I got about 1800miles, got hit and cracked the case.
Engine was a monster up till then.
Stock kit comes with,
NT Speed carb, 41t sprocket, Allen key cap screws in the engine, rag joint hardware is upgraded, 415 HD chain, stronger mounting studs.
The cases are clean casts, cranks are super well balanced from the factory, and Cheez himself goes thru each engine before shipping..
Upgrades available, 36t sprocket, RT carb, 2 different expansion chambers(not Hardcore, but better than stock.
He has cnc heads and parts coming at months end as well.
This is his site, not complete.
http://cheezypks.com/
Maniac57 has also gotten 4 or 5 Cheez kits, and loves them.
There hasn't been one complaint about them. Cheez takes care of his customers.