Duncan racing PC 4000 4-stroke power cylinder

[LI400EX]

Is any one running a Duncan Racing PC 400 power cylinder, the 440 kit that is a bolt on? If so any info you have will be helful, which compression, pump gas, reliability? Also if you heard anything on it as well on how it performes please let me know, and if the kit is going to still get ripped by the new 450's. Thanks

[Rootar]

you can rest assured that if its from Ducan and its for a 400ex motor its reliable and if you want to run premium pump gas stay at 11:1 or below on the compression. i plan on running the Ducan cylinder coupled with a Hotrods 460 crank and Hotcams set up when it time to rebuild my 416 motor