Takegawa high performance drop in K10 camshaft.  Works with stock or aftermarket valve springs.  Not for use with roller rockers.  This is a great cam for your KLX110 if you are keeping the stock head.  

For 2002-2009 KLX/DRZ110 - no additional parts needed.

For 2010-2016 - You will need a cam gear and bearing adapter such as #TBW9220

For 2017+ - You will need a cam gear such as #TBW0645