SyNtAxx Posted January 19, 2004 Report Share Posted January 19, 2004 Hey all, I just tore my engine apart for the first time...putting on new topend for sure... was considering a +4 stroke if my stock crankshaft is shot. How do I tell for sure if i need a new crank shaft. If my stock shaft is still good...should I port it and what type of port?? I ride hillclimbs and trail/woods. If I port and decide to get a stroker later...will they be able to make my porting work for the stroker or will i need new jugs and have to start form scratch ? Thanks for you help, Nick Quote Link to comment Share on other sites More sharing options...
thecabinboy Posted January 19, 2004 Report Share Posted January 19, 2004 the amount of play on the rods will tell you if the journals have spread. Quote Link to comment Share on other sites More sharing options...
wheeleymaster99 Posted January 19, 2004 Report Share Posted January 19, 2004 the amount of play on the rods will tell you if the journals have spread. how much play should there be if any Quote Link to comment Share on other sites More sharing options...
spoin39 Posted January 19, 2004 Report Share Posted January 19, 2004 Measuring from side to side at crankshaft .25-.75. Anymore and junk it. Quote Link to comment Share on other sites More sharing options...
PassionRE Posted January 19, 2004 Report Share Posted January 19, 2004 There are definately limits on porting for a 350 platform and then going to a stroker later. Get with your builder before hand and let thim know this if you want to run a stroker later.....Jim Quote Link to comment Share on other sites More sharing options...
boonman Posted January 19, 2004 Report Share Posted January 19, 2004 .25-.75 what??? If that is inch measurement, that would be alot!!!!! I am thinking you mean .25mm-.75mm. That wouldn't be bad. .00985"-.02955" would be what feeler guage you would use.... Quote Link to comment Share on other sites More sharing options...
spoin39 Posted January 19, 2004 Report Share Posted January 19, 2004 mm, not inches. I guess I should have been more specific. Sorry about that. Quote Link to comment Share on other sites More sharing options...
boonman Posted January 19, 2004 Report Share Posted January 19, 2004 I was just pickin' on ya. Quote Link to comment Share on other sites More sharing options...
spoin39 Posted January 20, 2004 Report Share Posted January 20, 2004 Pick away boon, I can take it! I hope to meet you if I make it to the dunes. Quote Link to comment Share on other sites More sharing options...
Nighty Posted January 31, 2004 Report Share Posted January 31, 2004 so the .25mm to .75mm play can be between the rod and the side of the crank? any more and its seperating? Quote Link to comment Share on other sites More sharing options...
Nighty Posted February 8, 2004 Report Share Posted February 8, 2004 So in fact the crank separation can be measured by lifting the top end off? would be good to know, ill be doing a top end rebuild soon and id like to check my crank out, I'm a bit worried. Quote Link to comment Share on other sites More sharing options...
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