H.S.I. water restricting kit for a stock OEM 61X exhaust chamber on a Yamaha SuperJet, WB1, or any twin cylinder Yamaha engine.
Restricting the water to the exhaust is a MUST for a lites racing class setup SuperJet, and is great on a recreational ski where you want to keep the stock exhaust. This will help "wake up" the stock exhaust with giving throttle response - helping the "potato stuck in a tailpipe" issue.Reduces the amount of water going to the exhaust while maintaining a SAFE temperature for the chamber and exhaust hoses.
Improve throttle response and gain acceleration with this simple mod. This is not just a couple tee fittings with hose to direct water overboard, we do actually have a restrictor in place. You will not be disappointed in it - especially for the cost!
Now included - the needed 5-foot of extra cooling line (OEM style black) and Qty-6 stainless 3/8" hose clamps.
PLEASE NOTE - A bypass fitting for a 2nd outlet is NOT included in the bundle - this will need to be added. It is recommended to run TWO billet bypass fittings so that the exit diameter is the same size (stock size is smaller).
To work in hand with the water restricting kit to "wake up" the stock exhaust, we also have our exhaust stinger reducing sleeve here.
Part Number: HSI-75-0007