Who ports cylinders for DDM?

[Clubin]

Just curious, I just bought one and I am less than impressed. I was just wondering if the person that is doing it knows what they are doing. Physically compared to a stock cylinder there is almost nothing done.
This is the one I am refering to: http://www.davesmotors.com/store/product1270.html

 

[cyclops1970]

if im not mistaken the pum engines are race ported from Zen ..
unless can you see the grind marks inside the jug ? if so i'd like to no as well but im just guessing though

 

[Clubin]

It definetly had some grinding done on the intake exhaust and transfer ports, but it doesn't appear to be anything excessive.

 

[Timmahh]

they have an inhouse porter. He does a decent job, but its not an aggressive porting job. just helps to spool up faster and have some gains in the torque and top rpms over stock units.


im not sure if there is much room for very aggresive porting done due to the different porting specs used when the cylinder is manufactured.

 

[marderbeet]

is there a vid anywhere that shows how its dine to port and polish zen motor?

 

[Timmahh]

not that im aware of. but one of hte member on HBF/Here, Cabbie made a how to port your motor thread on HBF.