Proudly Hand-Built in America!
Porting, Kawasaki Z1, KZ900, KZ1000 & KZ1100.
PitStopPerformance.com port work is not called “porting and polishing”. It is called “porting” because there is no “polishing”. My thirty five years of work with a flow bench has proven to me that polishing serves no useful purpose. Polishing will not yield any higher flow numbers on the flow bench than no polishing. For this reason, I am not going to waste my time and your money polishing.
Stage I Porting:
- Increase flow by 15% – 20% over stock.
- This level of porting uses stock sized valves and stock sized carburetors.
- This port work must be performed with a valve job and valve guide installation.
- On the intake, most of the port work is from the valve guide to the valve seat, for that reason, the seat must be as large as the valve diameter allows in order to obtain the full increase in flow.
- On the exhaust, the entire port is reshaped, again having the seat as large as the valve will allow is the only logical way to start.
- The port work comes complete with a flow chart for one intake port and one exhaust port.
Stage II Porting:
- Increase flow by 25% – 30% over stock intakes and 20% – 25% over stock exhausts.
- This level of porting uses over sized valves and over sized carburetors.
- This port work must be performed with a valve job and valve guide installation.
- The port work is from the carburetor manifold to the valve seat on the intake and from the valve seat to the gasket surface on the exhaust, the seat must be as large as the valve diameter allows in order to obtain the full increase in flow.
- The port work comes complete with a flow chart for one intake port and one exhaust port.
Contact us at joe@PitStopPerformance.com with your specifications to receive a quote.