win 64-bit. Which means it’s designed to be a great all-rounder motorcycle helmet at an affordable price. The C70 features an internal sun shield with a manual, easy-slide lever mechanism. Sena Device Manager for HJC for Microsoft® Windows XP, Vista, 7, 8 series and 10. win 32-bit. In 1971 the factory turned all of its attention to motorcycle helmets and set itself the simple goal of providing high quality, comfortable, and reasonably priced helmets to motorcyclists throughout the world. HJC C70 - Koro . Based on the incredibly popular and best value IS-17, the new C-70 features smooth lines for reduced noise and incorporates an all-new drop-down sun visor system. MAC. In 1971 the factory turned all of its attention to motorcycle helmets and set itself the simple goal of providing high quality, comfortable, and reasonably priced helmets to motorcyclists throughout the world. The Advanced Polycarbonate Composite Shell provides a lightweight helmet, with superior fit and comfort using advanced CAD technology. online manual. STEP 2: UPDATE. Based on the popular IS-17, this everyday helmet by the premium brand features a lightweight and aerodynamic design, a wide field of vision, drop-down sun visor among other innovative mod cons- and its available for under £150! HJC have been designing and manufacturing high quality protective helmets since the early 1950s. It also means it has one heck of a job to do – to replace one of their best selling, highest safety rated and fullest-featured crash helmets on the market. The HJC C70 is HJC’s replacement for their IS17 helmet. online manual. HJC have been designing and manufacturing high quality protective helmets since the early 1950s. The C70 is part of HJC's latest range of full-face helmets. The “ACS” Advanced Channeling Ventilation system allows full front to back airflow to flush heat and humidity up and out. video guide. MAC OS X. video guide. Sena Device Manager for HJC for Mac ® OS X Snow Leopard, Lion, Mountain Lion, Mavericks, Yosemite, El Capitan, Sierra and High Sierra.