Poolman Posted January 29, 2012 Report Share Posted January 29, 2012 Hey Guy's, I have done allot of research on this forum and am in need of some experienced advice. I have made a video today and would appreciate anyone interested to watch it and give me some feedback. I am putting a milled head on my Banshee that I purchased from Jeff (Fast Farm and Sand toys). I decided to clean the top's of the pistons with some degreaser and steel wool when the piston started wiggling. I don't think this is good but maybe it's within spec. I know you guy's will know. Thank You so much for your experience and interpretation. Also if you deem this needs machine work would you please advice with who. Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted January 29, 2012 Report Share Posted January 29, 2012 I didnt watch the entire thing. Get a set of calipers and measure the bore of the cylds.. Then get the numbers off the top of the pistons.. see if they are infact the proper pistons for the bore. Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted January 29, 2012 Report Share Posted January 29, 2012 If you can move it enough to hear piston slap imajine what it's like running. If I heard right it's 64mm bore. Have your jugs micked and figure out what size to bore, or just send them off to Jeff. Quote Link to comment Share on other sites More sharing options...
crustydemon Posted January 29, 2012 Report Share Posted January 29, 2012 Yeah thats not good, and thats more than a little side to side. I'd recommend Jeff also, he'll get you fixed up. Quote Link to comment Share on other sites More sharing options...
shakar Posted January 29, 2012 Report Share Posted January 29, 2012 id guess.... time for a topend Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted January 29, 2012 Report Share Posted January 29, 2012 Looks Ike too much in those pistons if you ask me......only way to really tell is to get them mic'ed at a machinist......I'd recommend any site sponsor on here for the rebuild and bore/hone Quote Link to comment Share on other sites More sharing options...
themechanic Posted January 29, 2012 Report Share Posted January 29, 2012 time for a bore job and new pistons, option 2 is run it like that and the piston skirt will break off and you will have major dammage. dont make the mistake of slapping a set of pistons in either Quote Link to comment Share on other sites More sharing options...
themechanic Posted January 29, 2012 Report Share Posted January 29, 2012 ps. have em ported too since they are off and at the machine shop Quote Link to comment Share on other sites More sharing options...
blowit Posted January 29, 2012 Report Share Posted January 29, 2012 Wiseco or otherwise forged pistons are neither concentric or cylindrical. You are inspecting the clearance at the timing edge which will certainly be more than other places on the piston. I too would recommend that someone mic the cylinders and pistons to determine the actual clearance. It is normal to see some wiggle on the top. The amount should be measured. Quote Link to comment Share on other sites More sharing options...
mike0chek Posted January 30, 2012 Report Share Posted January 30, 2012 could be egg shaped now too, either way get it bored and probly ported too if your already gettin some work done Quote Link to comment Share on other sites More sharing options...
Poolman Posted January 30, 2012 Author Report Share Posted January 30, 2012 Thank You everyone who responded with your expertise and oppinions to my question. I talked to Jeff today and I'm sending the cylinder's to him in the morning. I've got them off the bike and soaking in soapy water in the wash basin in the laundry room. Jeff told me to send them in clean and packed good and tight. Some of you mentioned getting them ported since they needed work anyway. The previous owner did have an MX trail port done to the cylinders when he had the topend done four years ago. I'm having Jeff check the port job while he has the cylinders. Do you guy's replace the cylinder stud's when you do your top ends ? Just curious because mine look kind of corroded/rusty. I have another question. My air mixture screws on both carburetors are screwed all the way in for the Banshee to run it's best. I know that they should be both set to 1 1/2 turns out to start tuning but they end up all the way in to run it's best. Any suggestions ? Quote Link to comment Share on other sites More sharing options...
FASTOYS Posted January 30, 2012 Report Share Posted January 30, 2012 studs should be fine just need wire brushed/cleaned.. Prolly need bigger pilots, 27.5 if stock carbs. Quote Link to comment Share on other sites More sharing options...
Poolman Posted January 30, 2012 Author Report Share Posted January 30, 2012 studs should be fine just need wire brushed/cleaned.. Prolly need bigger pilots, 27.5 if stock carbs. Thanks Jeff, I'm leaving right now for the post office. I included a list of the things I need in the box. I added 2 - 27.5 pilots. I also put 2 - 280 main jets. I just dropped the float bowl on both carbs and both the pilots are reading 25. Mains are 260. Quote Link to comment Share on other sites More sharing options...
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