| Darren is the 16hp whats quoted by the manufacturer or is that tested with dyno graphs provided ?
& are we talking engine or real wheel hp ?
i ask because the manufacturers over rate the engines to sell more & of course the PR blurb, i know this because BZM quote 15.5 & i have never seen a stock BZM out out 15.5 hp more like around 12 hp rear wheel in standard form & that's on a dyno | 
