Trouble T Posted January 27, 2004 Report Posted January 27, 2004 OK here is the story. I put FMF Fatties and K&N air filter on a stock 2002 Banshee. I moved the slide up one position and put 290 mains in it. It ran perfect from 90 degree days in the summer to 4 degree days this winter. I took it out in a snow storm recently and it suddenly started revving really high and then going back to an idle then back to revving really high all by itself. It did this for about 20-30 seconds. It ran perfect after that Ever since then it will run perfect up to half throttle. As soon as I give it more than half throttle it bogs and backfires. I disconnected the tors brain under the gas tank. The sensors on the p-brake and carbs are still on but not functional because the brain is disconnected right? Here is the really starnge part. When I check the plugs they are brown on one side and white on the other. Each plug has a white side and a brown side. I am begining to wonder if it may be electrical. I am always burning through headlights. It has always burned through headlights even long before this problem developed. It sounds like it is not getting enough fuel for some reason. Any ideas what could restrict the flow of fuel? I checked the choke tube between the carbs. Any suggestions are very welcome. I tried everything I can think of. If anyone can figure it out it will be someone on this board. Thanks, Troy Quote
sheeBASTARD Posted January 27, 2004 Report Posted January 27, 2004 I had this happen, I check everything to the line...came out to be a clogged main jet...lol get some high presure air tru them. (Pilot jet) better tru all the inside of the carb...laters Quote
Trouble T Posted January 27, 2004 Author Report Posted January 27, 2004 What was clogging your main jet. They are pretty big jets. It would take a small rock to clog them. Clogged mains would make sense but I can not imagine anything big enough to clog my main jet got into my carb in the first place. Quote
01bansheefox Posted January 27, 2004 Report Posted January 27, 2004 I had almost the same exact problem, when i installed my FMF SST's all i did was take it to the shop and they put in 290 main jets. They were stock at the time,solved everything. So if i could take a guess it has something to do with your jets. Quote
boonman Posted January 27, 2004 Report Posted January 27, 2004 Jetting needs to be richer for the cold weather. Also, check the reeds. They may be cracked... Quote
1_bansheenutt Posted January 27, 2004 Report Posted January 27, 2004 I agree on the reeds, if its ran fine thru the weather changes and you just noticied a problem, I'd say a cracked reed also, although I may be wrong....did you do the jetting, how did it run after you did the pipe change and jetting, check the reeds and be sure you got the carbs cleaned and everything installed correctly. You should consider yourself lucky to have a bike that runs good in weather that cold...LOL...it takes a pull from another quad to get mine going in cold weather, but when its running, its ssssssscccccccrrrrreeeeeeaaaaaammmmmmmingggggggg. Quote
1_bansheenutt Posted January 27, 2004 Report Posted January 27, 2004 You may want to try a plug change as well, both of 'em. Quote
ledofthezep Posted January 27, 2004 Report Posted January 27, 2004 Same sounding symptoms as mine...not the revving up & down though. Mine just backfires & spits at WOT. I've got it narrowed down to the stator, don't know what else it could be...will be replacing it soon to see if that fixes it. I've already replaced it once when the stock one took a shit on me. Quote
Nighty Posted January 27, 2004 Report Posted January 27, 2004 hey led, Did you check your pickupcoil clearance? Quote
Trouble T Posted January 28, 2004 Author Report Posted January 28, 2004 Thanks for all of the help. I had to brave the freezing cold garage and pulled off both carbs. I was right and wrong. The jets are too big to get clogged with dirt. Apparently they are not too big to get clogged with a piece of grass! How the ^%$# did that get in there???? Anyway I took the piece of grass out and it runs better than ever. Now I just need to figure out why I keep burning out the headlights. Thanks again. If it were not for this site I would be dragging my Banshee to the dealer every other weekend. Troy Quote
boonman Posted January 28, 2004 Report Posted January 28, 2004 Now I just need to figure out why I keep burning out the headlights. Check your voltage regulator... Quote
ledofthezep Posted January 28, 2004 Report Posted January 28, 2004 hey led, Did you check your pickupcoil clearance? Sure did, even tried moving it both in closer & out a bit,...same problem. It's got to be the stator, if it's not I'm going to sell the fucker! j/k,...will just spend more money until I get it right! Quote
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