shee_rider350 Posted July 19, 2015 Report Share Posted July 19, 2015 Hello, I have a 1990 banshee that was freshly rebuilt, it has fmf pipes and proper jetting, it had some spark issues but we found out the key switch went bad. it now starts up and idles, sometimes other times it will back fire when you kick it. But once it is idling it sounds fine until you hit the gas and then its bogs down, we are messing with the timing. but to be completely honestly im clueless what could be causing it ,the carbs are in time and clean, any ideas would really appreciate it. Quote Link to comment Share on other sites More sharing options...
Atomic Monkey Posted July 19, 2015 Report Share Posted July 19, 2015 What other mods, and list what isn't OEM. Quote Link to comment Share on other sites More sharing options...
shee_rider350 Posted July 19, 2015 Author Report Share Posted July 19, 2015 We removed the key. It has a vetos pro crank, wiesco pistons. It also has the toris system removed off the carbs. Quote Link to comment Share on other sites More sharing options...
shee_rider350 Posted July 19, 2015 Author Report Share Posted July 19, 2015 Also bought a stock cdi box thinking that was the issue but no. I have an extra stator and we tired it, but it also ran the same. Quote Link to comment Share on other sites More sharing options...
Posterizer Posted July 19, 2015 Report Share Posted July 19, 2015 Show me a banshee that doesn't bog an il show you a banshee that doesn't start. Quote Link to comment Share on other sites More sharing options...
shee_rider350 Posted July 19, 2015 Author Report Share Posted July 19, 2015 That made no sense. I'm looking for real help here. Quote Link to comment Share on other sites More sharing options...
Posterizer Posted July 19, 2015 Report Share Posted July 19, 2015 (edited) If your looking for real help you should of said mate give deadbeat a pm he knows these banshees like the back of his hand (he's a wanker) all these other guys will have you chasing rainbows. Edited July 19, 2015 by Posterizer Quote Link to comment Share on other sites More sharing options...
wayne_smith97 Posted July 19, 2015 Report Share Posted July 19, 2015 That made no sense. I'm looking for real help here.List your exhaust, jet sizes, elevation and air box mods. And temp your riding in Quote Link to comment Share on other sites More sharing options...
shee_rider350 Posted July 19, 2015 Author Report Share Posted July 19, 2015 I have fmf Rev pipes, mine jet is 260 pilot is 60, I live in the PA so it fair weather and no crazy elevation. It's around 70-85 when I'm rideing. And it has stock air box Quote Link to comment Share on other sites More sharing options...
wayne_smith97 Posted July 19, 2015 Report Share Posted July 19, 2015 I have fmf Rev pipes, mine jet is 260 pilot is 60, I live in the PA so it fair weather and no crazy elevation. It's around 70-85 when I'm rideing. And it has stock air boxNeed to double check that pilot size. It's should be either 25, 27.5 or 30. Does air box still have the snorkel? I take it that you stay under 1500 ft of elevation? You either have fmf gnarly, fatty's or sst. Not sure they made a rev pipe for banshee. Quote Link to comment Share on other sites More sharing options...
shee_rider350 Posted July 19, 2015 Author Report Share Posted July 19, 2015 Yea you were right, it's 30. And no it dose not have it on the air box. Quote Link to comment Share on other sites More sharing options...
wayne_smith97 Posted July 19, 2015 Report Share Posted July 19, 2015 Set your af screw to 1 1/2 turns out if the bog doesn't go away, start turning it out a 1/4 turn at a time. If it gets better the pilot is too big. I know fmf calls for a 30 pilot, but your air box is still on and you're not ported. Check on pipes. Gnarly, sst or fatty. Also this is assuming your carbs are squeaky clean. Quote Link to comment Share on other sites More sharing options...
shee_rider350 Posted July 19, 2015 Author Report Share Posted July 19, 2015 Allright, and they are fatty pipes. But I will work with the af and see what's up, but I don't believe it will be the pilot jet because I just randomly started doing this. It was fine before hand. Quote Link to comment Share on other sites More sharing options...
wayne_smith97 Posted July 19, 2015 Report Share Posted July 19, 2015 Then you should really tear the carbs down and clean the crap out of them. Get all parts out of the and boil them. That's what I do. If it just started it then chances are that the carbs are dirty. Once you get the carbs off go ahead and leak down test it. Cheap insurance. Would hurt to check compression too. Quote Link to comment Share on other sites More sharing options...
shee_rider350 Posted July 19, 2015 Author Report Share Posted July 19, 2015 Yeah that did no help. It was already at 1/1.2 turns. I believe it's out of time. My question for you is, the fly wheel. Is it spose to be tight or have a little play/jiggle to it. Quote Link to comment Share on other sites More sharing options...
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