http://www.knology.net/~klkman/ValveAdj_Yam660.pdf
http://www.knology.net/~klkman/Yamaha_SZR660_Service_Manual.pdf
http://www.knology.net/~klkman/Service%20Manual_Engine4NN_MZ660.pdf
http://www.knology.net/~klkman/mz660_wiring_diagrams.pdf
http://www.knology.net/~klkman/Baghira-MastiffPartsList.pdf
http://www.knology.net/~klkman/MZBaghira_altparts.mht
And this particular tool makes doing valve adjust a pure cinch
http://www.motionpro.com/motorcycle/tools/tappet_tool_set/
enjoy
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Kyle