Z400Banshee Posted November 30, 2012 Report Share Posted November 30, 2012 I got mine new crank today and I know they say it comes balanced but what pistons do they use for balancing them. Thanks, Jason Quote Link to comment Share on other sites More sharing options...
421alkybanshee Posted December 2, 2012 Report Share Posted December 2, 2012 they dont use pistons. Quote Link to comment Share on other sites More sharing options...
Z400Banshee Posted December 2, 2012 Author Report Share Posted December 2, 2012 so does anyone get there crank balanced on a 421 before installing? just wondering. Quote Link to comment Share on other sites More sharing options...
Nieskes Posted December 3, 2012 Report Share Posted December 3, 2012 Is this a joke? Quote Link to comment Share on other sites More sharing options...
Finch Posted December 3, 2012 Report Share Posted December 3, 2012 ya mean true'd? Quote Link to comment Share on other sites More sharing options...
Nieskes Posted December 3, 2012 Report Share Posted December 3, 2012 ya mean true'd? I sure hope not, that would make this even more strange..... Quote Link to comment Share on other sites More sharing options...
Z400Banshee Posted December 3, 2012 Author Report Share Posted December 3, 2012 I meant balanced like on a car crank. They need the pistons to balance them so i wasn't sure if they did this for a small motors as well. I never saw a crank balanced before so I dont really know how it is done. I joined this site to learn how you guys build your race motors and to help me on my build. Quote Link to comment Share on other sites More sharing options...
Nieskes Posted December 3, 2012 Report Share Posted December 3, 2012 http://bansheehq.com/forums/index.php?showtopic=62717 http://bansheehq.com/forums/index.php?showtopic=31018 http://bansheehq.com/forums/index.php?showtopic=73234 Quote Link to comment Share on other sites More sharing options...
camatv Posted December 6, 2012 Report Share Posted December 6, 2012 i dint click those links. the only place i know for sure that does actual atv crankshaft balancing is crankworks. you have to send your pistons etc with the crank and they can do it .. if you want to do this give them a call.. a "true and weld" is a little differnt its not a balanced crank just setup so it turns true in the straight line bore. that is its not out of line across the center. most "hotrods" are setup to within factory spec or less. in my personall experience the better the true is the better it will run i usually shoot for .0005 or less that takes a long time to do and a lot of patience. there is also "phasing" that is the relationship of degree's the 2 sides are at. a 0 phase or 180 d phase is perfect any more and the timing can get all out of line and cause all kinds of issues.. i have seen a lot of crank out of phase especially if they were not welded inside OR have been rebuilt and had issues when going back together. its something not looked at very often. you can even have the cranks "pinned" thats where they are pperfect phased then a pin is cut into the webs to help they stay in true. its a great idear to do as much as you can with a GOOD quality crank if your serious about building a good drag motor. a well built crankshaft will go a long way. cheapo cranks and cheapo assembly will result in all kind of problems and issues.. Quote Link to comment Share on other sites More sharing options...
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