PC 4000 and HP4 head

[honda400ex2003]

So does anyone have all of the duncan racing stuff on their machine on their 400ex? I mean the cylinder and the head and cam and the JE piston. I am looking at the whole kit in the 440 but am wondering if everything is worth the 2 grand? Any help would be great. thanks in advance, Steve

[Smoker]

Just have HD studs installed at Gt Thunder, same difference. If your spending 2 grand on a motor, I would sell your bike and get something faster.

[rob-u/21]

I have a full duncan 440 national kit. But I dont have a PC4000 cylinder. I think it runs great. You really feel a difference when comparing to stock 400's. I'm really thinking of switching to a PC4000 cylinder.

[honda400ex2003]

Thanks for the info on the duncan motor. Steve