The new HRP Lifter is built by Jesel and is a direct replacement for the XL Style Lifters. Measurements are .730” Body diameter with DLC coating, .855” Roller Diameter, .365” Roller Width, with a .375” Diameter Axle. Adjuster Screw is 7/16” diameter.
We now have a new grind for the 4-cam engines running the 86-90 XL style set-up. This includes the Overkill, PRP, our Derringer engines and others the use the 4-cam valve train. The injected cams (HR-J) are designed for 150 - 200 cubic inch Nitro engines. Improvements include a much larger diameter cam lobe that improves lifter roller to cam lobe contact. This design also allows the cam manufacturer more flexibility in designing the profile of the lobe. We spent many hours designing and testing our new injected grind with the main objective to relieve some of the extreme exhaust pressure the exhaust valve has to open against. This is the main reason for pushrod, lifter and rocker arm failure in these engines. The larger lobe diameter has allowed us to do that so the valve train has it a bit easier opening the exhaust valve. Valve lift is .865" with a 1.74 rocker ratio.
We CNC these Adjustable AIr Bleed assemblies from 6061 billet aluminum. We use a large knurl on the adjuster screw for easy adjustments. Threaded end is 1/8" NPT thread. These are installed in the injector or manifold to adjust cylinder temperatures.
The carbureted cams (HR-E) have the larger cam lobes as well and gives .745 inches of valve lift with a 1.62 rocker ratio, and a bit more duration that our HR-1 cams that have been in our Derringer engines for years. The E cam grind is also available for our Gen-4 upgrade.
Our 3-Way Fuel Shut-off Kit redirects the fuel flow back to the tank when activated to prevent dead-heading the fuel pump.
Pictured here is our remote belt drive kit with our 2-stage oil pump. We also offer a 3-stage oil pump that has a second scavenge section. This remote belt drive kit works well on the fuel pumps as well.
Hawaya Racing Products has a new "Big Rod" available for the injected Harleys. Our new rod has improved oiling in the wrist pin area to aid in preventing the pin from seizing in the rod. Inadequate oiling is a known cause of wrist pin flex as the pin no longer rotates in the pin bore. We have also beefed up the area around the wrist pin to help reduce distortion of the wrist pin bore. The "Big Rod" is designed to take the CB-1512 style rod bearing and 1.094 wrist pin. We can produce this rod with a center to center distance of up to 9.0". Contact HRP for more info.
We also positioned the WOT switch to activate coming off idle rather that wide open to ensure that management systems get turned on as soon as possible.
The throttle shaft rotates on sealed roller bearings instead of the body itself. This ensures a positive seal between the shaft and throttle body, eliminates wear in the throttle body and provides very smooth operation.
Throttle bodies are Billet Aluminum, and available in sizes of 2 1/2", 2 5/8", 2 11/16", 2 3/4", 2 7/8" & 3.0" in diameter.
One piece throttle bodies and linkage arms are CNC machined of Billet Aluminum providing a safe and light weight unit. These throttle bodies come complete with Barrel valve, billet throttle cable bracket, and all necessary linkage.
This is one of our fuel distribution blocks set up with the mounting bracket, On/Off safety valve and deadman cable and guide attached.
HRP now has the Gen-4 Valve Train Upgrade kit available to convert your Derringer to a high cam version. There are many advantages to the Gen-4 package, first off it is available in either a dry top end kit (like most all engines are), or a wet version that pressure feeds oil the top end. The Gen-4 upgrade moves the cams up about 3 inches.
We are a dealer for Waterman and Kinsler. We keep a large selection of fuel system parts and plumbing in stock including nozzle lines, nozzles, jet cans, barrel valves, pumps, distribution blocks, AN fittings and hose.
We carry a large inventory of Earls, AN fittings and hoses, as well as Kinsler fuel injection components.
Our pistons are available coated or un-coated.
Piston Skirt Buttons and Installation Tool. We offer these in 3/16" and 1/4" sizes.
We also have pistons for the 4-valve fuel engines.
We stock a large selection of exhaust tubing bends for any combination you can think of. We also carry exhaust head flanges for the most popular heads, along with our CNC machined Billet exhaust clamps.
We can also offer the 2 into 1 collectors in carbon steel or stainless steel.
We keep pushrod material and ball ends in stock.
We make custom pushrods in house.
We manufacture pinion shafts for the Overkill, PRP, and our own Derringer racing engines in house.
Intake manifolds for dual injector applications.
We have the largest inventory of Billet UPM heads on the planet.
Did I mention that we have the largest inventory of Billet UPM heads on the planet.
We machine custom cylinders as well as cylinders for all popular engine brands.
Aviaid oil pumps and repair parts in stock.
Our HRP oil pump is available in 2-stage or 3-stage , and can be remotely belt driven with our belt drive kit.
This is the TAR fuel management system. It is the best system I have ever had on a injected fuel bike!
Cometic makes cylinder shims for us for most of the popular engines.
We machine our Piston skirt buttons in Delron and Peek material in several sizes.
You can't get these anymore anywhere else but here. 4130 steel rod cages for the 1 1/2" crankpin type engines.
We offer SFI approved engine restraint systems from ECS. I have never seen one of these systems fail.