fredsaprilia Posted January 25, 2009 Share Posted January 25, 2009 What purpose do they serve? thanks. Quote Link to comment Share on other sites More sharing options...
Bill_on_a_bike Posted January 25, 2009 Share Posted January 25, 2009 They drive the balance shafts, which are shafts with eccentric weights attached. They spin in anti-phase with the crank shaft so as to reduce vibration as much as possible. Quote Link to comment Share on other sites More sharing options...
fredsaprilia Posted January 26, 2009 Author Share Posted January 26, 2009 Gotcha cheers, and just to double check, when refitting counter balance gears the wieght needs to be down verticaly, and the piston needs to be top dead centre right? Does it have to be absoulutly presice? Thanks Quote Link to comment Share on other sites More sharing options...
Bill_on_a_bike Posted January 29, 2009 Share Posted January 29, 2009 Gotcha cheers, and just to double check, when refitting counter balance gears the wieght needs to be down verticaly, and the piston needs to be top dead centre right? Does it have to be absoulutly presice? Thanks Not sure about counter weight orientation, but I think the two cogs usually have marks on that align them. How you align them to the crank and balance shaft, i'm not sure, woodruft key?If you've read that somewhere it may well be correct. Quote Link to comment Share on other sites More sharing options...
Guest Posted February 2, 2009 Share Posted February 2, 2009 I have one and it is still like riding a jack-hammer... Quote Link to comment Share on other sites More sharing options...
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