I was hoping valves got bigger so there would be a head upgrade in my future. there is no new part numbers for complete head or valves. so I would assume the only real changes are the muffler and the larger improved airbox tube. the latter being a disappointment as removing tube from early box is a very substantial and prolly gets you pretty close to that 44hp figure. and I would think the early muffler is already optimized for the engines power band, so the new twin outlet muffler may be more about fluff than an actual improvement.
anyone with some actual data? or will this thread be an opportunity for an over blown opinion fest?