The naraku piston kit for derbi gpr 50 nude 2006-2011 is part of the latest collection from naraku.Features: naraku performance quality piston set the naraku piston has a molybdenum coating to reduce wear and shorten the running-in period the cnc-machined grooves in the piston skirt ensure continual lubrication piston kit comes complete with rings, oil scraper rings, gudgeon pin and circlipshigh-quality replacement piston for 50cc original and 50cc naraku cylinders for derbi d50b0 engines. Special molybdenum coating for protecting the cylinder and piston during the run-in period. It is a good rule to change the piston in a 50cc 2-stroke engines after about 6,000 miles. This will help engine performance and reduce fuel consumption.Specifications: product name: piston kit skirt coating: moly coated units: kit to fit: aprilia rs4 125 2011 replica european models aprilia rs4 125 2011 european models aprilia rs4 125 2012 replica european models aprilia rs4 125 2012 european models aprilia rs4 125 2013 replica european models aprilia rs4 125 2013 european models aprilia rs4 125 2014 replica european models aprilia rs4 125 2014 european models aprilia rs4 125 2015 replica european models aprilia rs4 125 2015 european models aprilia rs4 125 2016 replica european models aprilia rs4 125 2016 european models aprilia rs 50 2006 european models aprilia rs 50 2007 european models aprilia rs 50 2008 european models aprilia rs 50 2009 european models aprilia rs 50 2010 european models ap...