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Discussion Starter #1 (Edited)
Dear Friends
I have a Kawasaki STX-R 2004 with ADA Cylinder Head with 40CC Domes and 14/24R Impeller, Novi 48 Carbs,Modify Water Box, Advent Ignitions, Water Injection system, Reed Valves,Air Filter Kit.
What I need to know is why these machine with all these aftermarket parts only runs 66MPH with a Speed Gun it reach 7170 RPM.
Any suggestions.
 

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gallitos98 said:
Dear Friends
I have a Kawasaki STX-R 2004 with ADA Cylinder Head with 40CC Domes and 14/24R Impeller, Novi 48 Carbs,Modify Water Box, Advent Ignitions, Water Injection system, Reed Valves,Air Filter Kit.
What I need to know is why these machine with all these aftermarket parts only runs 66MPH with a Speed Gun it reach 7170 RPM.
Any suggestions.
You may need to repitch the impeller, or try a diffrent one like a aftermarket solas or skat-trak.
 

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Discussion Starter #4
Kawasaki stx-r

Dear Friends
After we verify the unit we discover that the Impeller was bent. We install a new Skat Track impeller 14/24R and the RPM increase to 7240.

We replace the OEM Plate for a new R&D.

At these time I can Race with GTX limited superchargesrs with 215HP and I can be at front about 5 Jetski.

I will port my engine to get better performance and also I will replace domes for a 38CC.

My mechanic in Puerto Rico have one stx-r running 72MPH and is great.
 
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