houghkyle Posted February 5, 2013 Report Share Posted February 5, 2013 I am planning on doing the first top end rebuild on my 06 banshee and I need to know what size pistons I need to buy. I am just going to hone the cylinders because they are in good condition. If I just hone the cylinder, cant I buy a stock 64mm piston or do I need to go up to the 64.5mm? Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted February 5, 2013 Report Share Posted February 5, 2013 How do you know the cylinders are good? Did you measure them 6 ways? They may look good, but you can't see an egg shaped bore. What started this top end rebuild? Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted February 5, 2013 Report Share Posted February 5, 2013 And no, you would need to bore them for 64.5 Quote Link to comment Share on other sites More sharing options...
houghkyle Posted February 5, 2013 Author Report Share Posted February 5, 2013 I did not measure them 6 ways. What started the rebuild was when I revved the motor up it made this swoosh sound out the exhuast with a cloud of smoke. It also wouldn't run without the choke on unless I held the throttle on. And it spit what looked like oil out the other exhaust. It is a totally stock 06 banshee that has never been rebuilt. I thought it was time and I am hoping the rebuild fixes the issues. Quote Link to comment Share on other sites More sharing options...
houghkyle Posted February 5, 2013 Author Report Share Posted February 5, 2013 Probably a stupid question but why do I need to go up in piston size if I am just doing a hone on the cylinder? Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted February 5, 2013 Report Share Posted February 5, 2013 Like I said, how do you know you cylinder in round? You should send it to a builder before you do this then get mad that it didn't work. Quote Link to comment Share on other sites More sharing options...
oldskool Posted February 5, 2013 Report Share Posted February 5, 2013 It sounds like you might have some carb issues(not sure). A couple things you should do before tearing it down is a compression test and a leakdown test. If your engine passes a leakdown test and then you have, lets say at least 110lb of compression, then your ok. If your compression is below 100lbs, its about time for a top end. At this point you need to take your cylinders to a machine shop, and they can measure your cylinders and tell you if they need a bore and then order pistons to match Quote Link to comment Share on other sites More sharing options...
Paulie B Posted February 5, 2013 Report Share Posted February 5, 2013 How many hours guesstimate do you have on your top-end? A compression test is good advice. I might be wrong but I think you can get under over sized pistons from ProX if your bore isn't tore up, gouged, or out of round. Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted February 6, 2013 Report Share Posted February 6, 2013 If you are less than half the "service" limit on bore/piston specs you could do just hone and rings. However, I wouldn't waste new pistons in an old bore, only another $100 or so to bore. You should be able to find a local shop/machine shop/dealer who can do the bore. You don't need to ship your shit to just get a simple rebuild done. Not like you're a high HP nut swinger. Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted February 6, 2013 Report Share Posted February 6, 2013 Never hurts to help support your local economy . JMHO, your results may, and will vary. And I DGAF either way . Quote Link to comment Share on other sites More sharing options...
houghkyle Posted February 6, 2013 Author Report Share Posted February 6, 2013 Does anyone know of a good shop around Wichita Kansas that would do this work for me? Quote Link to comment Share on other sites More sharing options...
Paulie B Posted February 6, 2013 Report Share Posted February 6, 2013 Never hurts to help support your local economy . JMHO, your results may, and will vary. And I DGAF either way . Hard day bro? I get mine done locally. He charges $50 a hole. Sometimes he hones my stuff for free too. Local is good! Quote Link to comment Share on other sites More sharing options...
houghkyle Posted February 6, 2013 Author Report Share Posted February 6, 2013 Anyone in the Wichita area know of a good shop??? Quote Link to comment Share on other sites More sharing options...
Starwriter Posted February 6, 2013 Report Share Posted February 6, 2013 Mull Engineering is right there in Wichita. Don't know if they bore cylinders, but if they don't I'm sure they can hook you up with someone good in your area. Quote Link to comment Share on other sites More sharing options...
houghkyle Posted February 8, 2013 Author Report Share Posted February 8, 2013 Thanks guys! I found a great local shop called JSR Performance (www.bigboremotors.com). Come to find out, it is run and owned by 5 time Pikes Peak Champion John Stallworth. Super nice guy and very knowledgeable. This guy knows his way around a banshee. I decided after JSR is done boreing the cylinders, I will have them port them and also mill the head. A new timing plate, lightened flywheel, K&N filter, new clutch and I should be ready for the dunes come spring. Anyone in the Kansas area looking to have their atv's or utv's worked on should really give John a call. Quote Link to comment Share on other sites More sharing options...
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