uhoh0573 Posted January 6, 2011 Report Posted January 6, 2011 So i pulled the head to change head gaskets the other night, found the pistons to be very loose so i figured great time to rebuild. I resealed and torqued the head and did a leakdown test which it passed with flying colors, pulled the jugs off and the right cyl had a very large portion of the ex. Side skirt was gone. How can i be sure there are no pieces in the case without splitting the case halves? Quote
dirtydownunder Posted January 6, 2011 Report Posted January 6, 2011 haha can you build a complete piston with all the broken bits you have . id be stripping it man, your half way there, throw some seals in it and call it a rebuild. i rather not wonder and just know. Quote
uhoh0573 Posted January 6, 2011 Author Report Posted January 6, 2011 I found several of the pieces in the head pipe, what i dont understand is the piston is beat to death on top but the ports are not nicked up nor is the head, there are no visible signs of pieces rubbing the crank. Im trying to avoid splitting this thing like the plague. Quote
Larry's Shee Posted January 6, 2011 Report Posted January 6, 2011 Doesn't take a very big piece to take out a bearing, bigger piece to take out a brand new piston/fresh bore. $25-30 for a Clymers manual , couple hours to split = peace of mind . You can leave trans in case , flush crank brgs , oil them up ,put it back together. JMHO, your results may vary. Quote
hnb Posted January 6, 2011 Report Posted January 6, 2011 sounds like a severe case of detonation on one cylinder or both --- mabye too lean on the top end of the throttle?? did both cylinders do the same thing Quote
midlifecrisis Posted January 6, 2011 Report Posted January 6, 2011 X2, strip it down man. Give yourself confirmation that the cases are clean. Its not a difficult thing to do, and youll have piece of mind. Quote
uhoh0573 Posted January 6, 2011 Author Report Posted January 6, 2011 The nicks on the piston are very obviously strikes from pieces of the piston that made it into the pipe. Ill see about splitting it. Quote
f4istunna Posted January 6, 2011 Report Posted January 6, 2011 i agree id split the cases if it were me might cost a few bucks in gaskets and some time but think of how much your gonna spend if somethings in there and wipes out your motor. Thats the way i try and look at it in those situations. Quote
uhoh0573 Posted January 6, 2011 Author Report Posted January 6, 2011 While im in these cases, does anybody make a bolt kit to replace these soft screws holding clutch/stator covers on? Quote
midlifecrisis Posted January 7, 2011 Report Posted January 7, 2011 While im in these cases, does anybody make a bolt kit to replace these soft screws holding clutch/stator covers on? I used these guys, very pleased with the product http://cgi.ebay.ca/Yamaha-Banshee-Polished-Stainless-Steel-ATV-Bolt-Kit-/310284828828?pt=Motors_ATV_Parts_Accessories&hash=item483e6ac09c Quote
Jereme6655 Posted January 7, 2011 Report Posted January 7, 2011 im curious as to why you bolted the head back on and did a leakdown test followed by pulling the juggs off... why didnt you just leave the head off when pulling the cylinders? Quote
uhoh0573 Posted January 8, 2011 Author Report Posted January 8, 2011 i pulled the head to change a blown head gasket, found the pistons to be very loose, so i put the head on to do a leakdown before i tore the motor down. its fairly hard to check crank seals for leaks with the head and cylinders off. Quote
Jereme6655 Posted January 8, 2011 Report Posted January 8, 2011 haha....ya i got how to do the leakdown test lol.....i was just confused as to why you bolted it back on.....totally forgot that you said your head gasket blew and that's why you had the head off in the first place...lol Quote
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