Easy bolt-on power. This is the largest bore kit available that does not require boring your engine cases for additional cylinder sleeve clearance. New aluminum cylinder with plated aluminum liner, high performance BBR MX camshaft with lightweight piston and gaskets are included in this complete and ready to go kit. BBR timing gear adjuster is included in this kit, allows the buyer to adapts 2003–2009 camshafts to 2017+ heads. Aluminum cylinder with plated aluminum sleeve BBR high-performance camshaft  Timing gear adjuster, Adapts 2003–2009 camshafts to 2017+ heads 60mm lightweight aluminum piston Gasket kit including cylinder head, cylinder base and LH ignition cover gaskets Application Notes:  This kit will not work with 2010-2016.  We have found that a very small number of KLX110's (about 1 out of 100) have cases that run a little tight and do not allow the oversize sleeved cylinder to be installed. This is a very rare case scenario and BBR has a cure for this. Please call 253-631-8233BBR General Jetting Guidelines ChartStock KLX110 - 53.0mm bore, 50.6mm stroke BBR KLX/DRZ110 143cc Big Bore Kit Instructions