Chainsaw Repair

the husq patent differs from the aprilla.  the aprilla is a case reed, with no starting carb or FI.  husq has no reeds, needs a carb or FI, and still has at least one transfer port and exhaust port like a traditional piston ported motor.

husq patent claim says "ease of starting" which is vgood.

unlike the aprilla motor which cannot be modified for extra power, the husq may(?) potentially be modified, since it uses a carb to FI to provide extra starting fuel for the savvy power mongers, if it can be fed more fuel.  guessing that the DI will not be adjustable here folks, unless you are good with computer code and/or have a supply or higher #/hour injectors.

images of original patent application here:  http://www.freepatentsonline.com/20120024275.pdf
verbage here: http://www.freepatentsonline.com/y2012/0024275.html

actual approved patent here:  http://www.uspto.gov/web/patents/patog/week12/OG/html/1400-4/US08677954-20140325.html