A W650 has about the smoothest idle of any bike I've ever had or heard.? Should sound something like a Singer sewing machine at under 1,000 RPM.? Nice, smooth, with very linear throttle response all the way through the rev range.? Zero hesitation and very smooth from bottom up.? Here's a link to my first foray into the carbs back in 2011.
The W has a couple unique features.? One is the clam style air box which is hard to understand until you see how it goes together.? Finding a shop manual is really the best place to start.? As you can see by the link there's a bit of work to taking off the carbs on these bikes.? Like anything, once you've done it not such a big deal.? By installing an on - off fuel petcock I'm able to run the carbs dryer so the ethanol can't work it's magic.? The only way to avoid this type of motorcycle maintenance is to have a fuel injected bike.
