eldreder Posted May 27, 2011 Report Posted May 27, 2011 i've got a banshee that's had 3 new cranks through it and all three have had the same rod bearing go out, any ideas why? the guy i got it from thinks that the bore might be crooked or something, i have no idea. whats your guys' thoughts? Quote
camatv Posted May 27, 2011 Report Posted May 27, 2011 are you mixing oil with the fuel Is it running lean are you reusing gaskets, seals.. ?? cases have a problem? leak test? bad parts ( doubtfull) Quote
AKheathen Posted May 29, 2011 Report Posted May 29, 2011 it's because it hates you........... well, normal people might be inclined to describe their steup to get real answers, lol. are they factory matched cases? have they been worked? (oil holes epoxied, etc) is the lower case chattered out? which bearing? hp, or at least mods so we can estimate hp/load? why is my finger pink? we can tell you things, but anything we tell you will be based off the fact that we don't know anything because you did not tell us.... Quote
2strokespirit Posted May 29, 2011 Report Posted May 29, 2011 Banging the head maybe, whats the squish? Quote
eldreder Posted May 29, 2011 Author Report Posted May 29, 2011 i really dont know that much about it, i just got it for free the other day, i think the only things done to it is toomey pipes a uni filter, vents in the air box, and boyesen reeds. they were all hotrod cranks and the rod bearing on the left side, the one on the crank itself, not on the piston Quote
Larry's Shee Posted May 29, 2011 Report Posted May 29, 2011 Ok, so the guy you got i from went thru 3 cranks, including a bad one right now? Have you torn it apart yet? If not do a leak-down before, just in case. What mix ratio was he/you using? If you've taken it apart what does head/piston look like on that side? How much time was on these cranks before they failed? X-2 on matched cases and squish if possible. Post pics if you can. Quote
eldreder Posted May 30, 2011 Author Report Posted May 30, 2011 yes i've torn it apart, the head was pretty awful, the cases are matched, it didn't look like there was much time on the new pistons, i'm not sure what a squish is? but here's a picture of the head Quote
bebetekbanshee358 Posted May 30, 2011 Report Posted May 30, 2011 yes i've torn it apart, the head was pretty awful, the cases are matched, it didn't look like there was much time on the new pistons, i'm not sure what a squish is? but here's a picture of the head detonation is killing all ur motors.. and yes detonation does fuck upo bearings if u didnt know.....looks pretty bad i thought mine was bad..maybe u put a degree key in backards maybe its at +10 lol who knows more info man would help everyopne else and u...... Quote
sleeper06 Posted May 30, 2011 Report Posted May 30, 2011 Dude stop putting cranks it it.Get all your shit checked out,cases, cylinders,possible shits just wrped but looks like you cooked it from lean condition Quote
eldreder Posted May 30, 2011 Author Report Posted May 30, 2011 haha calm down, i didn't put any cranks in it, i got it for free. i think what might've happened is the detonation, or if the guy that had it replaced the crank but left the stock bearings in it. Quote
camatv Posted May 31, 2011 Report Posted May 31, 2011 air leaks from bad assembly,, bad gas oil mix?/ redneck dirtroad fullthrottle runs to prove to drunk friends how "fast" it is.. wish i could get one for "free" Quote
AKheathen Posted June 1, 2011 Report Posted June 1, 2011 hard to tell in the pic, but it kind of looks like the had has been beat back down by the piston after running the bearing pieces through. i would have things mic'd out, and replace the head/pistons. check for dirty/plugged/contaminated fuel system, just go over everything untill you have ruled out more than piston and head clearance Quote
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