![]() ![]() It can change fuel and ignition timing, depending on the engine modifications you have done and type of riding you are doing. On the pricey side, this thing is like a mini computer. For this project, the machine was equipped with a $799 programmable, multi-map-carrying Vortex ECU. Now, you are not going to get more horsepower from increased airflow unless you increase the fuel supply as well. The Pro Design filter unit is an easy-to-clean, foam style. This aluminum adapter plate increases airflow and allows you to clamp on any air filter you wish. To match the increased airflow exiting the motor, the Duncan crew installed a Pro Design Pro Flow intake and air filter kit. This system has a large aluminum muffler and stainless steel head pipe. ![]() What they did do is install one of their $599, complete Fat Boy 4 Exhaust systems. Duncan Racing builds some of the most reliable race and play engines on the planet.įor this project, they left the internals of the motor alone. The first is they know how to increase the horsepower and torque of any powerplant without creating a hard-to-ride animal. ![]() To massage the Honda engine, we called on Duncan Racing for two reasons. We also wanted it to have a long range, good lights for night travel and a GPS for navigation. It needed to be comfortable for long hours in the saddle with bulletproof suspension. It has to be fast and powerful for high top speeds and high-altitude travel. When we embarked on this project, we didn’t want to build a machine that could win a big desert race, we wanted a machine we could use for exploring Baja and beyond. Baja-well, SoCal, Nevada and Arizona-has a lot of that. The 700XX is at home on long, straight, dirt roads and over nasty, rocky terrain. You can see a complete test of a sand dune-equipped 700XX at In Baja, the beast is good. We slowed down the slow speed compression on the rear Elka shock to make it perform as well as a straight axle machine. The heavy 700XX even works well in the sand with the Duncan Racing upgrades. But, on the other hand, we wonder if Matlock will choose the big beast this year when Honda doesn’t have a say in the matter because they will not be his sponsor. If you ask the winner of the last two Baja 1000s, Wayne Matlock, you might get a different story. It’s comfortable and capable of going almost anywhere. It has lots of ponies and more than a handful of torque. It’s hard to compare this monster to anything else on the planet. ![]()
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March 2023
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