NOON
Noon started with modifying Harley Davidson motorcycles. We’re drawn to the brand due to the mechanical simplicity which allows for a lot of creative freedom when modifying and altering performance and aesthetic attributes. We offer some very unique products and build aspects that you won’t find anywhere else.
One of the things we specialize in is exhaust systems for Harley Davidson™ motorcycles. We’ve built exhaust systems for everything from the Pan America™ 1250 to the Harley Davidson™ Ironhead. Our exhaust systems exceed against other aftermarket systems in performance and quality. Thorough dyno testing, and an insatiable need to produce the highest quality available has netted us performance numbers that beat out every manufacturer we have tested against. Our Chambered line of exhausts has averaged 10% performance gains over any 2 into 1 exhaust system that doesn’t utilize an expansion chamber.
Harley Davidson™ Chamber Exhaust System
An exhaust systems job is simple, right? Well the concept is, at least. Its main goal is to move hot, compressed gasses and unburnt fuels out of the engine. Naturally, I wanted to improve the process. In an effort to increase flow I have incorporated an expansion chamber of sorts (theoretically a Helmholtz resonator) into the initial stage of both headers of the exhaust. The chamber allows the hot gas to expand into the chamber, cool into a denser gas, and re-enter the exhaust stream allowing more cooler, dense gas to flow through the exhaust. The chambers assist in exhaust scavenging, helping evacuate burnt fuel/gas so that they don’t pollute the next intake cycle (end of cycle extraction). This results in better flow and a cleaner burn on the next cycle.
Dyno tests have shown that the Noon Racing Chambered exhaust performs up to 10% better than the leading competition 2-1 exhaust. More specifically the chambers helped low end in a short primary length.
It’s common that a short exhaust system will increase top end performance, leaving something to be desired in low end torque. Add a set of chambers and they will help spread that top end power down to the bottom, improving a broad range of RPM. Add these chambers to a long exhaust and even better torque yields will be seen.
The No Friends Ironhead
…an on going project
While the Ironhead isn’t particularly known for its outstanding performance, our goal was simply to make it, well, perform. A motorcycle is not just a tool for transportation, it’s a statement. With all of that in mind we set out to create a visually stimulating vehicle that could compete with the handling of modern motorcycles.
Many changes were made to the original production frame. The entire chassis from the back of the engine to the swingarm was completely cut off. A minimal subframe was built, new mono-shock mounts were created, and an entirely new swingarm was built. These changes completely changed the geometry of the bike to something more closely resembling modern sport bikes than Harley sportsters from the era. Modern front end components were utilized including inverted suspension forks, custom CNC machined triple trees, and large diameter dual floating rotor brakes with 4 piston calipers.
A complex mechanism was designed to allow the use of a rear-set design while maintaining full use of the factory kick start location.
The rider position was drastically modified to a more aggressive position to lower rider center of gravity. That included creating an entirely new seat section that was combined with a stainless oil tank at the rear. New footpeg, shifter and kickstart mechanisms were designed and created to aid in this position change. A new exhaust was built up and away from the ground to help with lean angle clearances. All of these changes amassed to a motorcycle that is hard to take your eyes off of. Aside from the aesthetic differences the riding experience is something that you would never expect from a motorcycle manufactured in the early 70’s with the nomenclature “Ironhead”.
More photos and updates on this project coming soon.