jackvx2k Posted August 2, 2014 Report Share Posted August 2, 2014 hey guys ive had a problem recently when i bought my new fmf fattys. i installed them and the i took the carbs out to change the jets. i only changed the main jets to 260 and left the pilot jet at 25. but when i rode the bike it wouldn't hit power band. so i went back and changed the jetting to the 200 that were recently in there. i also decided to take of the snorkel on the air filter box. but when i rode my bike it was perfect but my banshee over heated so bad that the plastic has now melted and the rubber that was connected to the pipes and the exhaust was smoking. i stopped the bike and shut it off and smoke was coming out of the exhaust with like a plastic smell. any ideas to what i can do? i think i have to change my jetting back to 260 but change the pilot jets to #30 if that is the problem? but please help because i dont want to destroy my banshee thanks for anyone that replies and gives me help Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted August 2, 2014 Report Share Posted August 2, 2014 Too late. Pilot should have been 27.5 200 main was too small too. I would do some serious inspection of the motor at this point. Do you have a Clymers manual? Quote Link to comment Share on other sites More sharing options...
sick421 Posted August 2, 2014 Report Share Posted August 2, 2014 27.5 pilot and 280 to 310 main Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted August 2, 2014 Report Share Posted August 2, 2014 ^^^ sounds good. As Windy said, you might have already damaged it. Might want to read the sticky "What jetting is" and "What jets are you using" GL, let us know how it turns out. Quote Link to comment Share on other sites More sharing options...
jackvx2k Posted August 2, 2014 Author Report Share Posted August 2, 2014 thanks heaps guys haha i knew i messed up when i saw that my plastic had melted. and i dont think i would have done much damage to the engine because i only rode for like 10 mins. but as you all know 10 mins can do a lot of damage. now that is my next problem, hopefully there is nothing wrong with my engine. and if there is how can i know? Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted August 2, 2014 Report Share Posted August 2, 2014 thanks heaps guys haha i knew i messed up when i saw that my plastic had melted. and i dont think i would have done much damage to the engine because i only rode for like 10 mins. but as you all know 10 mins can do a lot of damage. now that is my next problem, hopefully there is nothing wrong with my engine. and if there is how can i know? If you want to be the guy who just throws in the correct jetting, then fires it up and takes it for a rip....go ahead. But if you wanna get a manual and be willing to spin some wrenches.......members will walk you through an inspection. I personally feel you cooked it good enough to need to freshen the top end and put in a fresh water pump. On the otherhand.....you could hope for the best and maybe it's fine.......or maybe you fire it up and it turns into a full rebuild. Guess it comes down to deciding how much you wanna learn and when. Some lessons in life can get expensive. ...... Quote Link to comment Share on other sites More sharing options...
jackvx2k Posted August 2, 2014 Author Report Share Posted August 2, 2014 thanks for the help windy. but if i do just fire it up with the correct jetting and its all good does that mean there is nothing wrong or will there be damage that i cant see unless i take it apart Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted August 2, 2014 Report Share Posted August 2, 2014 How did I miss this gem? That thing is toast. Compression test it, take the pipes off and shake them to see if any debris comes out. Look in the exhaust ports, hell might as well just pop the head off, as an over heating like that has at a minimum warped the head. Get it milled flat, and install a new gasket if all is well. Make sure to read directions in the future. I'd be surprised if it's not toast though. Quote Link to comment Share on other sites More sharing options...
jackvx2k Posted August 2, 2014 Author Report Share Posted August 2, 2014 my day just keeps on getting worse Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted August 2, 2014 Report Share Posted August 2, 2014 I believe it needs to be inspected. Yes it's work. But after getting that hot it might need a bore/hone, fresh pistons. Or.....you roll the dice and it all goes bad and you end up needing to split cases and replace crank and seals too. Either way, EVERYONE here would agree that the owner of a machine (new to them) should verify jetting rather than trust the previous owners tune job. Part of that is to do a leakdown check. I know your gut wants to hope for the best. But if it got that hot........well.......you know my stance. It's your call. Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted August 3, 2014 Report Share Posted August 3, 2014 I know….It was all bad news right? We've all been there a time or two. You ran the wrong jets and cooked it good. You don't want to break out the wallet and start spending money, so you don't want to look for the true extent of the problems. But you are going to have to learn about that machine sooner or later. When your depression lifts…..come on back and we'll walk you thru it. Quote Link to comment Share on other sites More sharing options...
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