I was planning on the dryer exhaust vent method. Dryer vent in the wall, ducting, and an inline fan (http://t.homedepot.com/p/Suncourt-Corded-4-in-In-line-Duct-Fan-DB204-CRD/203227157/ or similar) to help pull fumes. This is just for a 600cc bike exhaust, so probably the low end of what you...