This papercraft is a life size Kamen Rider Accel's Bike Form Helmet, from the Kamen Rider W (Kamen Rider Double), a 2009-2010 Japanese tokusatsu drama, the eleventh series in the Heisei period run of the Kamen Rider Series, the paper model was created by PepMaster.
The power of the Accel Memory allows Kamen Rider Accel to assume a motorcycle-like form called Bike Form, transforming quite literally into a motorcycle. This form is accessed by removing the Accel Driver buckle from the belt when the Face Flasher lights up and when transformed, it allows Kamen Rider Accel to reach speeds of 920 km/h. In Kamen Rider W Forever: A to Z/The Gaia Memories of Fate, Bike Form has its own Maximum Drive after the Engine Memory is inserted in the Accel Driver and Accel switches to Bike Form: a super-powered dash through the target.
- AccelTurbuler: Other than his own Gunner A unit, Kamen Rider Accel Bike Form can combine with the RevolGarry's Turbuler unit to become the AccelTurbuler. Not only does Accel have use of the Scramble Cutter guns, he can also transform his upper body out of Bike Form to execute a Maximum Drive in which he pierces through his target in the shape of a burning letter A.
- Bike Form can also combine with Kamen Rider Double's Boilder or Splasher units to become the AccelBoilder or the AccelSplasher respectively. These forms were not shown in the series itself. [Source: wiki]
You can download this paper model template here: Kamen Rider W - Life Size Kamen Rider Accel Bike Form Helmet Papercraft Free Download