lokisbuddy Posted March 18, 2009 Report Share Posted March 18, 2009 I had my 300 mains in it for a while and then it started backfiring and not running. I pulled the carbs apart a few weeks ago and found a small chunk of rubber under the needle seat, pulled it out and re-assembled now it don't run. I tried 290's today and it ran for about 20 seconds then got really hot and started backfiring so I shut it down. I don't know what the hell to do I checked the reeds they are fine, I have tried 290's, 300's,310's and 320's I can't get the damn thing to stop back firing. I have pods/outerwears, pro circuit platinums with factory sound silencers I am riding in around 50-60 degrees at 330ft, Since I can't get the damn thing to run long enough to do a plug chop I don't know how to check my jetting. Also is 290 kinda big? My buddy got a 01 yesterday and other than low end bog it runs great it has fattys and a k&n air box filter with the lid and outerwear and its @ 240 mains? I am seriously about to sell mine and get a single two stroke dirtbike or something. Quote Link to comment Share on other sites More sharing options...
F.T.W. Banshee Posted March 18, 2009 Report Share Posted March 18, 2009 Clean the carbs prolly the piliot jet clogged. Quote Link to comment Share on other sites More sharing options...
killshee Posted March 18, 2009 Report Share Posted March 18, 2009 Clean the carbs prolly the piliot jet clogged. i had this problem it was a clogged pilot jet Quote Link to comment Share on other sites More sharing options...
lokisbuddy Posted March 18, 2009 Author Report Share Posted March 18, 2009 (edited) Nope. I cleaned every orfice in these damned carbs. I have had a lot of bikes and shit and never had problems like this thing is giving me. (That may be a slight exageration lol) I will pull the pilot again and check but I just had the carb apart like 45 seconds befor I started it I blew through the pilots and i could see right through them. Also I only had it running for a good 45 seconds, 20 of which was running crappy and it was hot as hell. Edit: I tried putting the 27.5s in it and it runs even shittier. wont even start just back fires. Edited March 18, 2009 by lokisbuddy Quote Link to comment Share on other sites More sharing options...
LS1Inferno Posted March 18, 2009 Report Share Posted March 18, 2009 if youve been through the carbs that many times id have to say its an electrical problem not a fuel problem. another suggestion would be put a fuel filter on it. just to keep them clean. Quote Link to comment Share on other sites More sharing options...
jjn56 Posted March 18, 2009 Report Share Posted March 18, 2009 do you have a good spark on both plugs? are you sure both cylinders are firing? Quote Link to comment Share on other sites More sharing options...
killshee Posted March 18, 2009 Report Share Posted March 18, 2009 i cleaned my pilots 3 or 4 times b4 mine stopped Quote Link to comment Share on other sites More sharing options...
killshee Posted March 18, 2009 Report Share Posted March 18, 2009 have u synced your carbs at all not saying that its the problem but i did mine and it took my bike from like 65% to like 90% lol big big differance Quote Link to comment Share on other sites More sharing options...
lokisbuddy Posted March 18, 2009 Author Report Share Posted March 18, 2009 Both cylinders fire good and run evenly, carbs are sync'd I put the 300's back in cleaned the pilots, started it up and it ran good I pulled it off the choke and it ran for 5 seconds and started bogging out then died. I think I am gonna get a stock airbox and throw the stock pipes back on. I have had nothing but a headache since I put the pipes on it. Also I checked the reeds and they look great no gaps or nothing but there is a little bit of air bubbling through them. Seriously I will give my assassins creed game to the first person that figures this out, I am literally gonna give it a week if I can't fix it by then I am gonna sell it and buy parts for my car. Quote Link to comment Share on other sites More sharing options...
lokisbuddy Posted March 18, 2009 Author Report Share Posted March 18, 2009 I am pretty sure it is a low end problem because last time I rode it she was bogging hard on low end and top it would scream. wish I had some non bent carb needles I would try that. But it ran good before with the slightly bent needles. Quote Link to comment Share on other sites More sharing options...
lokisbuddy Posted March 18, 2009 Author Report Share Posted March 18, 2009 My dad said maybe my floats need adjusting since I messed with them. Does that sound like it could be the problem? Where can I get a float adjustment tool? I made one using a 21mm socket but I guess that might be off. Quote Link to comment Share on other sites More sharing options...
boneyardbanshee. Posted March 18, 2009 Report Share Posted March 18, 2009 If its a low end bog it should not be caused by your mains. Try messing with your air screws or pilots. Quote Link to comment Share on other sites More sharing options...
boneyardbanshee. Posted March 18, 2009 Report Share Posted March 18, 2009 Justt noticed you said your needles are bent. That very well may be causing it also. Your needles change things not only in lenth but the shape of the needle. Quote Link to comment Share on other sites More sharing options...
BlasterKX Posted March 18, 2009 Report Share Posted March 18, 2009 now this might be a shot in the dark but you said a chunk of rubber was inside of ur carb? have you checked your float needle cuz the tips of those have some rubber on it. maybe it rotted out and broke apart and would cause it to run to rich or to lean or some shit. just a guess Quote Link to comment Share on other sites More sharing options...
dragbanshee Posted March 18, 2009 Report Share Posted March 18, 2009 I dont know about it running good with the choke on, but anyways have you mixed different types of oil in the same tank of gas? I done this once on my 1st banshee and made it backfire and ran like crap. :shrug: I also was wondering about that chunk of rubber, and thats the only place I could think of that it would have come from. Quote Link to comment Share on other sites More sharing options...
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