2008 Hot Products Catalog

76 INTAKE SYSTEMS ENGINE/ GASKETS EXHAUST DRIVE LINE HANDLING ELECTRICAL WATERLINE /BILGE STEERING & CONTROLS BODY ACCESSORIES SERVICE TOOLS /HARDWARE CHEMICAL The Flow Control Valve provides improved throttle response and much quicker starts by drying out your waterbox at low rpm and idle speeds. Tests have shown an average acceleration improvement of 10 feet over a non-equipped model in the first 50 feet. The Flow Control Valve allows unrestricted water flow to the Stinger for better top speed.Yet it controls the amount of water at low speeds for better response. It also allows for an easier tuning of the Carburetors. It does not interfere with normal engine or exhaust pipe cooling and is compatible with all electronic water injection systems. Race Legal for All Classes.Two Models are available. Both are adjustable. The Standard Flow Control Valve is preset at 3.5 p.s.i. and is adjusted by adding the supplied stainless steel shims to increase the spring tension. The Pro-Series is externally adjustable by turning the outer housing by hand. Pressure can be tested with pop off gauge. All PWC w/OEM or aftermarket exhaust systems (except Yamaha’s w/OEM exhaust) Part No. 52-3118 52-3119 52-3122 Description Standard Flow Control Valve 3/8” Pro Flow Control Valve 3/8” Pro Flow Control Valve 1/4” RIVA EXHAUST STINGER WATER FILTER/RESTRICTOR Features fine mesh stainless filter screen that is threaded to accept Mikuni main jet (not included) for water restriction. Allows removal of restrictive filter screen in water distribution manifold of single, twin and triple exhaust systems, providing increased cooling water to motor. Part No. RY15-SF38 Description Exhaust Stinger Water Filter/Restrictor 3/8” JETWORKS QUICK DISCONNECT WATER RESTRICTOR QD-38 comes with 4/3/2mm restrictor inserts used for controlling water flow through exit passes, stinger, head pipes, etc. QD-14 is for use with Mikuni Jets (not included), and allows quick change in small increments of water flow. Part No. QD-38 QD-14 Description Quick Disconnect Water Restrictor 3/8” Quick Disconnect Water Restrictor 1/4” QD-14 QD-38 JETWORKS FLOW CONTROL VALVE Our adapter kit is designed to improve bottom end response and get the craft into high speed quickly and gives more acceleration out of turns. By allowing the craft to get up on a plane quicker, less time is spent pushing or plowing the craft through the water. This is especially true on the XL models. The quicker you get the craft up and on the water, the quicker the boat will accelerate because you can use or free up the horsepower that is being used up to displace or push aside the water. The water drag - frictional loss of the wetted surface - is reduced and this is when the craft actually starts to really accelerate. One of the main reasons the GPR and XL are sluggish or experience a lag on acceleration is due to the large amounts of water that enter the water box. This water backs up in the water box to be purged or blown out upon acceleration. The water box can hold a considerable amount of water. This can not be purged or blown out since the hoses and resonators are located at a higher level than the water box. The water must be pushed upwards and through the resonators. Since the water box is fairly large it can hold a good amount of water. It is not until all this water is blown out that the exhaust can be free flowing. During all this time the craft is trying to get on a plane which causes more load on the engine and further lengthens the process. What we do is to block the water reaching the original spray orifices and use a water pressure sensitive flow control valve to control when water is injected through the OEM stinger outlet. By using this kit, you can reset the RPM when you want the water to start flowing. By setting the RPM point to 3400 RPM, you have eliminated the water flow at idle and in a sense have a dry water box upon acceleration.The craft can now get on a plane quicker and accelerate much much quicker. We don’t need water flow below these RPM’s mostly because the firing pulsations are too weak and too far apart to create any considerable heat at this location (too far away).This also increases acceleration in the mid-range to upper mid-range and greatly improves acceleration coming out of turns.This is accomplished primarily because we also have completely shut down the water flow through the orifices in the OEM stinger outlet at the moment of deceleration. (NOTE: This kit is designed to be used on watercraft that have a catalytic converter removed and also using a straight tube in place of the plastic sound suppression resonators.) There are two kits available: The 155-SPK kit requires the removal of the cooling system overheat sensor. The 155-SPK-TS kit retains the overheat sensor but requires you to drill and tap the water jacket of the exhaust system and install a calibrated bypass fitting on the craft. This kit comes complete with all the bypass fittings, hoses, tees and clamps. JETWORKS GP1200R/XL1200LTD FLOW CONTROL ADAPTER KIT Part No. 155-SPK 155-SPK-TS Yamaha Flow Control Adapter Kit Flow Control Adapter Kit